---
title: "What is the typical lifespan of 718H mold steel components for high volume plastic production?"
description: "Tired of unexpected mold component wear, inconsistent surface finish and unapproved material substitutions in recent injection molding projects? Get clear actionable criteria for 718H mold steel selection, verification, lifespan estimation and cost tradeoffs to avoid production delays and extra maintenance costs."
url: "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html"
language: "en"
type: "Q&A"
category: "Injection Molding Q&A"
datePublished: "2026-09-19"
dateModified: "2026-09-19"
brand: "OK TOOL"
manufacturer: "OK TOOL"
answerCount: 9
---

# What is the typical lifespan of 718H mold steel components for high volume plastic production?

## Question

 Last quarter we switched 3 mid-size ABS household appliance part molds to non-brand imported P20 steel components to cut tooling costs 12%, but we ran into 2 unexpected issues: first, the fine textured surface on the product side wore out after only 32,000 cycles, requiring full re-polishing that delayed our mass launch for 8 days, second, 1 out of 6 mold inserts had uneven hardness that caused consistent flash on 2 wall positions, adding 15% of post-process labor for the parts. Our engineering team suggests moving all 12 upcoming new mold projects to 718H mold steel components, but we have limited past experience with this grade, and there are 3 different quoted prices from our existing suppliers that differ by up to 28%. I need to figure out where the actual performance gaps are, what non-negotiable verification steps we should add to our incoming inspection, and whether the higher upfront cost of 718H will actually deliver net savings over the full mold lifecycle, so I can lock the right material standard and approval process before we release the new mold POs. 

## Answers
                            
### Answer 1 — Best Answer

The core root of your recent P20 performance failure comes from two mismatches between material grade and production demand: standard pre-hardened P20 has a typical hardness of 28-32 HRC, while 718H is consistently pre-hardened to 33-37 HRC with adjusted nickel content that delivers far better texture retention and uniform hardness across the full cross section of steel blanks up to 400mm thick. The 28% price gap across supplier quotes does not come from base steel cost alone; most low-priced options use re-smelting recycled 718H feedstock that leaves non-metallic inclusions inside the steel, which will cause pitting during texturing, or even crack under repeated injection pressure after 80,000 cycles.

For immediate decision making, you can run a simple lifecycle calculation first to verify net cost. **Take your 3 mid-size appliance molds as reference group, calculate total accumulated cost including initial component cost, unplanned polishing downtime, scrap loss from defective parts, and rework labor for 300,000 target cycles.** The number will almost always show that 718H delivers 18-25% lower total cost than standard P20 for this production volume, even if the upfront component cost is 20% higher. The 33-37 HRC hardness range of 718H eliminates the uneven hardness problem you encountered with the low quality P20 inserts, as long as you specify that all steel blanks must come from a first grade mill certified with cross section hardness deviation no greater than ±1.5 HRC.

Add two non-negotiable incoming inspection steps that take less than 2 hours per batch, no extra outsourcing required. First, use a portable Rockwell hardness tester to take 5 measurement points across the full machined surface of each key insert, reject any part with deviation over 2 HRC. Second, run a 10x magnifier surface check right after receiving components, to spot any hidden fine lines or uneven polish marks that indicate unremoved inclusions under the surface.

**Set a minimum 120,000 cycles guaranteed service term as a mandatory clause in your 718H mold component POs, excluding only damage caused by improper operation or foreign object hit inside the mold cavity.** This clause will naturally filter out suppliers that try to use recycled feedstock to cut prices. For texture matching, 718H can reliably achieve SPI-SPE A2 finish for most mid volume consumer products without extra pre-treatment, and it supports 2-3 rounds of full re-texturing during the mold lifecycle, which is impossible for standard P20 after 60,000 cycles.

To avoid common misunderstandings, do not purchase 718H components that offer post-hardening to 48-52 HRC for your household appliance projects. **Pre-hardened 718H that requires no further heat treatment after component machining will eliminate 100% of the hidden deformation risk that comes with secondary heat treatment.** This will cut your lead time for mold component delivery by 3-5 days, and remove the extra cost of post-heat treatment distortion correction. After you roll out this standard, you will see your unplanned mold maintenance downtime drop by over 60% for all 12 upcoming projects.

**status:** accepted
**Author:** Jason Zhou
**Date:** 2026-09-19

### Answer 2

You can run a small batch trial first using one 718H test insert in an existing mold that is already running the ABS appliance parts, before committing full volume to new molds. Run 50,000 cycles with the standard production parameters, then pull the insert out to measure texture roughness, check for any wear marks, and compare part dimensional consistency with the old P20 insert you removed. This trial will give you real field data specific to your material, injection pressure and cycle time, instead of relying on generic steel mill datasheets.

For glass fiber filled ABS compounds that you might introduce for future product upgrades, 718H also offers 30% better abrasion resistance than standard P20, so you will not need to rework all your mold components when you switch resin grades later. Even for parts that only need 50,000 total production cycles, the better texture consistency from 718H will reduce part rejection rate related to surface defects by 10-12% directly.

**status:** suggested
**Author:** Rachel Huang
**Date:** 2026-09-19

### Answer 3

Align the 718H material specification lock step with your existing mold approval workflow to avoid unplanned delays. Add the 718H mill certificate requirement as a pre-condition before any mold component machining starts, so your suppliers can not substitute lower grade steel without your prior notice. Reserve 1 extra business day in your sample confirmation timeline to run all the 718H component checks before mold trial, so you do not have to push the whole project timeline back 7-10 days if a defective component needs rework.

Define a clear change control rule that any substitution of 718H steel blank source must be submitted for written approval 3 working days in advance, no verbal notification will be accepted. This will eliminate the most common source of unexpected quality issues during multi-project concurrent execution, and help you hit all your mass production launch milestones on schedule.

**status:** suggested
**Author:** Emily Chen
**Date:** 2026-09-19

### Answer 4

When you release the 718H mold component drawing standard, adjust your existing design tolerances slightly to leverage the material advantages fully. 718H has much lower residual stress than standard P20, so you can reduce the draft angle requirement for textured surfaces from 1.5 degrees to 1 degree for most of your ABS parts, without adding any ejector mark risk.

This will free up extra design space for your product team to add small structural features that would otherwise cause demolding scratches. You also do not need to add extra 0.03mm polishing allowance on the cavity surface for 718H components, as the uniform steel structure will not create uneven polishing marks that you often see on low grade P20 blanks. This adjustment will cut your total machining time for each mold component by around 8%, further reducing extra production cost for the 718H parts.

**status:** suggested
**Author:** Eric Zhao
**Date:** 2026-09-19

### Answer 5

Adjust your regular mold maintenance schedule to match 718H performance characteristics to extend its full service life. You can extend the full mold tear down and preventive maintenance interval from every 20,000 cycles to every 40,000 cycles, as the 718H steel structure is far less prone to fine corrosion spots that form from moisture inside the cooling lines.

When you do polishing during maintenance, you will not need to use extra coarse abrasive papers to remove worn layers on the cavity surface, medium grade 1200 grit polishing sheets are enough to restore the original texture finish after 40,000 cycles. The inserts can be re-shimmed 3 more times than standard P20 inserts after minor wear, before you need to replace them completely. This will reduce your annual mold maintenance labor cost by nearly half, compared to your previous P20 mold fleet.

**status:** suggested
**Author:** Amy Li
**Date:** 2026-09-19

### Answer 6

Map all the past mold related scrap and downtime records from the last 6 months, and sort out all cost items that are directly related to material hardness inconsistency, texture wear, or unplanned polishing. You will find that most of these cost items are hidden in separate departmental accounts, from production line downtime cost to post process rework labor, which are not counted into the original tooling budget.

Once you switch to 718H components, you can set a baseline of these cost metrics, and track the monthly improvement progress after the new molds are put into production. You will notice that the total process waste related to mold issues will drop steadily over 3 months, which creates extra capacity for your injection molding lines to take on more new orders without extra capital investment. You can also roll this 718H standard across all existing old molds during their next maintenance period, to upgrade the whole mold fleet step by step.

**status:** suggested
**Author:** Olivia Chen
**Date:** 2026-09-19

### Answer 7

Build a dedicated 718H mold component inspection checklist that adds three new checkpoints that are not in your current P20 inspection document. First, cross verify the steel mill heat number printed on the steel blank surface against the number on the material certificate, to make sure there is no mismatch that indicates a substituted blank. Second, take additional hardness measurement points at the gate impact position on each cavity insert, as this area receives the highest abrasion from incoming molten plastic, so even a small hardness deviation here will cause early wear.

Third, do a quick acid etch test on a small non-critical edge of the component, the uniform fine grain structure of genuine 718H will show no dark spots or uneven color patches after etching, which is the easiest on site way to rule out low quality recycled material. All these checks can be done on site in your incoming quality control area, no third party lab testing is required for regular batches.

**status:** suggested
**Author:** David Zhang
**Date:** 2026-09-19

### Answer 8

Compare the total material cost difference between 718H and other similar pre-hardened mold steel grades to avoid overpaying for unnecessary performance. You do not need to select the higher hardness 738H grade for your current ABS household appliance projects, as it adds 18% extra material cost while delivering only 5% higher abrasion resistance, which brings no tangible benefit for your production volume. If you do have 2 upcoming projects that will run 1 million + cycles of glass fiber reinforced PP parts, you can reserve the higher grade steel only for those specific projects, rather than applying it across all 12 projects.

The 28% price gap between supplier quotes can be broken down clearly: low quotes usually use recycled feedstock material at 30% lower base cost, mid range quotes use genuine first grade mill 718H, and very high quotes usually add unnecessary heat treatment or extra machining operations that you do not actually need for your application. This breakdown will help you select the cost performance sweet spot that fits your exact project requirements.

**status:** suggested
**Author:** Daniel Yang
**Date:** 2026-09-19

### Answer 9

When you design the 718H mold components, adjust the gate position and runner layout slightly to maximize the material strength advantage. 718H has better impact toughness than standard P20, so you do not need to add extra support ribs behind the gate area to prevent cavity deformation under high injection pressure. This will reduce the total steel volume of each mold insert by 7-10%, cutting the total material cost of the 718H components even further, to narrow the gap between your old P20 budget and new 718H budget.

You can also integrate more small venting slots directly on the 718H cavity surface, as the material will not burr or chip easily during slot machining, which will reduce part burn defect rate without adding extra post machining work. For large size components over 300mm, you do not need to split the insert into multiple smaller pieces for hardness consistency, as 718H maintains uniform hardness across large cross sections, which reduces total mold assembly tolerance stack up risk significantly.

**status:** suggested
**Author:** Kevin Liu
**Date:** 2026-09-19

## Related Resources

- [Injection Molding Q&A](https://www.ok-tool.com/qa/injection-molding/)
- [Plastic Injection Molding](https://www.ok-tool.com/capabilities/plastic-injection-molding/)
- [Injection Molding Guide](https://www.ok-tool.com/manufacturing/injection-molding/)
- [Injection Molding Buying Guides](https://www.ok-tool.com/buying/injection-molding/)
- [Products](https://www.ok-tool.com/products/)
- [Custom Manufacturing](https://www.ok-tool.com/custom-manufacturing/)
- [Manufacturing Knowledge Base](https://www.ok-tool.com/knowledge/)
- [Injection Molding](https://www.ok-tool.com/knowledge/injection-molding/)

## Structured Data

```json
[
    {
      "@context": "https://schema.org",
      "@type": "QAPage",
      "mainEntity": {
        "@type": "Question",
        "name": "What is the typical lifespan of 718H mold steel components for high volume plastic production?",
        "text": "Last quarter we switched 3 mid-size ABS household appliance part molds to non-brand imported P20 steel components to cut tooling costs 12%, but we ran into 2 unexpected issues: first, the fine textured surface on the product side wore out after only 32,000 cycles, requiring full re-polishing that delayed our mass launch for 8 days, second, 1 out of 6 mold inserts had uneven hardness that caused consistent flash on 2 wall positions, adding 15% of post-process labor for the parts. Our engineering team suggests moving all 12 upcoming new mold projects to 718H mold steel components, but we have limited past experience with this grade, and there are 3 different quoted prices from our existing suppliers that differ by up to 28%. I need to figure out where the actual performance gaps are, what non-negotiable verification steps we should add to our incoming inspection, and whether the higher upfront cost of 718H will actually deliver net savings over the full mold lifecycle, so I can lock the right material standard and approval process before we release the new mold POs.",
        "answerCount": 9,
        "upvoteCount": 8,
        "datePublished": "2026-09-19T06:23:12Z",
        "dateModified": "2026-09-19T06:28:47Z",
        "author": {
          "@type": "Person",
          "name": "Anonymous",
          "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html"
        }
                ,"acceptedAnswer": {
            "@type": "Answer",
            "text": "The core root of your recent P20 performance failure comes from two mismatches between material grade and production demand: standard pre-hardened P20 has a typical hardness of 28-32 HRC, while 718H is consistently pre-hardened to 33-37 HRC with adjusted nickel content that delivers far better texture retention and uniform hardness across the full cross section of steel blanks up to 400mm thick. The 28% price gap across supplier quotes does not come from base steel cost alone; most low-priced options use re-smelting recycled 718H feedstock that leaves non-metallic inclusions inside the steel, which will cause pitting during texturing, or even crack under repeated injection pressure after 80,000 cycles. For immediate decision making, you can run a simple lifecycle calculation first to verify net cost. Take your 3 mid-size appliance molds as reference group, calculate total accumulated cost including initial component cost, unplanned polishing downtime, scrap loss from defective parts, and rework labor for 300,000 target cycles. The number will almost always show that 718H delivers 18-25% lower total cost than standard P20 for this production volume, even if the upfront component cost is 20% higher. The 33-37 HRC hardness range of 718H eliminates the uneven hardness problem you encountered with the low quality P20 inserts, as long as you specify that all steel blanks must come from a first grade mill certified with cross section hardness deviation no greater than ±1.5 HRC. Add two non-negotiable incoming inspection steps that take less than 2 hours per batch, no extra outsourcing required. First, use a portable Rockwell hardness tester to take 5 measurement points across the full machined surface of each key insert, reject any part with deviation over 2 HRC. Second, run a 10x magnifier surface check right after receiving components, to spot any hidden fine lines or uneven polish marks that indicate unremoved inclusions under the surface. Set a minimum 120,000 cycles guaranteed service term as a mandatory clause in your 718H mold component POs, excluding only damage caused by improper operation or foreign object hit inside the mold cavity. This clause will naturally filter out suppliers that try to use recycled feedstock to cut prices. For texture matching, 718H can reliably achieve SPI-SPE A2 finish for most mid volume consumer products without extra pre-treatment, and it supports 2-3 rounds of full re-texturing during the mold lifecycle, which is impossible for standard P20 after 60,000 cycles. To avoid common misunderstandings, do not purchase 718H components that offer post-hardening to 48-52 HRC for your household appliance projects. Pre-hardened 718H that requires no further heat treatment after component machining will eliminate 100% of the hidden deformation risk that comes with secondary heat treatment. This will cut your lead time for mold component delivery by 3-5 days, and remove the extra cost of post-heat treatment distortion correction. After you roll out this standard, you will see your unplanned mold maintenance downtime drop by over 60% for all 12 upcoming projects.",
            "upvoteCount": 8,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#acceptedAnswer",
            "datePublished": "2026-09-19T08:29:43Z",
            "author": {"@type": "Person","name": "Jason Zhou","url": "https://www.ok-tool.com/team/jason.html"}        }
                ,"suggestedAnswer": [
                  {
            "@type": "Answer",
            "text": "You can run a small batch trial first using one 718H test insert in an existing mold that is already running the ABS appliance parts, before committing full volume to new molds. Run 50,000 cycles with the standard production parameters, then pull the insert out to measure texture roughness, check for any wear marks, and compare part dimensional consistency with the old P20 insert you removed. This trial will give you real field data specific to your material, injection pressure and cycle time, instead of relying on generic steel mill datasheets. For glass fiber filled ABS compounds that you might introduce for future product upgrades, 718H also offers 30% better abrasion resistance than standard P20, so you will not need to rework all your mold components when you switch resin grades later. Even for parts that only need 50,000 total production cycles, the better texture consistency from 718H will reduce part rejection rate related to surface defects by 10-12% directly.",
            "upvoteCount": 0,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#suggestedAnswer-2",
            "datePublished": "2026-09-19T08:29:41Z",
            "author": {"@type": "Person","name": "Rachel Huang","url": "https://www.ok-tool.com/team/rachel.html"}          }
          ,          {
            "@type": "Answer",
            "text": "Align the 718H material specification lock step with your existing mold approval workflow to avoid unplanned delays. Add the 718H mill certificate requirement as a pre-condition before any mold component machining starts, so your suppliers can not substitute lower grade steel without your prior notice. Reserve 1 extra business day in your sample confirmation timeline to run all the 718H component checks before mold trial, so you do not have to push the whole project timeline back 7-10 days if a defective component needs rework. Define a clear change control rule that any substitution of 718H steel blank source must be submitted for written approval 3 working days in advance, no verbal notification will be accepted. This will eliminate the most common source of unexpected quality issues during multi-project concurrent execution, and help you hit all your mass production launch milestones on schedule.",
            "upvoteCount": 0,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#suggestedAnswer-3",
            "datePublished": "2026-09-19T08:25:26Z",
            "author": {"@type": "Person","name": "Emily Chen","url": "https://www.ok-tool.com/team/emily.html"}          }
          ,          {
            "@type": "Answer",
            "text": "When you release the 718H mold component drawing standard, adjust your existing design tolerances slightly to leverage the material advantages fully. 718H has much lower residual stress than standard P20, so you can reduce the draft angle requirement for textured surfaces from 1.5 degrees to 1 degree for most of your ABS parts, without adding any ejector mark risk. This will free up extra design space for your product team to add small structural features that would otherwise cause demolding scratches. You also do not need to add extra 0.03mm polishing allowance on the cavity surface for 718H components, as the uniform steel structure will not create uneven polishing marks that you often see on low grade P20 blanks. This adjustment will cut your total machining time for each mold component by around 8%, further reducing extra production cost for the 718H parts.",
            "upvoteCount": 0,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#suggestedAnswer-4",
            "datePublished": "2026-09-19T08:23:44Z",
            "author": {"@type": "Person","name": "Eric Zhao","url": "https://www.ok-tool.com/team/eric.html"}          }
          ,          {
            "@type": "Answer",
            "text": "Adjust your regular mold maintenance schedule to match 718H performance characteristics to extend its full service life. You can extend the full mold tear down and preventive maintenance interval from every 20,000 cycles to every 40,000 cycles, as the 718H steel structure is far less prone to fine corrosion spots that form from moisture inside the cooling lines. When you do polishing during maintenance, you will not need to use extra coarse abrasive papers to remove worn layers on the cavity surface, medium grade 1200 grit polishing sheets are enough to restore the original texture finish after 40,000 cycles. The inserts can be re-shimmed 3 more times than standard P20 inserts after minor wear, before you need to replace them completely. This will reduce your annual mold maintenance labor cost by nearly half, compared to your previous P20 mold fleet.",
            "upvoteCount": 0,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#suggestedAnswer-5",
            "datePublished": "2026-09-19T08:05:27Z",
            "author": {"@type": "Person","name": "Amy Li","url": "https://www.ok-tool.com/team/amy.html"}          }
          ,          {
            "@type": "Answer",
            "text": "Map all the past mold related scrap and downtime records from the last 6 months, and sort out all cost items that are directly related to material hardness inconsistency, texture wear, or unplanned polishing. You will find that most of these cost items are hidden in separate departmental accounts, from production line downtime cost to post process rework labor, which are not counted into the original tooling budget. Once you switch to 718H components, you can set a baseline of these cost metrics, and track the monthly improvement progress after the new molds are put into production. You will notice that the total process waste related to mold issues will drop steadily over 3 months, which creates extra capacity for your injection molding lines to take on more new orders without extra capital investment. You can also roll this 718H standard across all existing old molds during their next maintenance period, to upgrade the whole mold fleet step by step.",
            "upvoteCount": 0,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#suggestedAnswer-6",
            "datePublished": "2026-09-19T07:49:36Z",
            "author": {"@type": "Person","name": "Olivia Chen","url": "https://www.ok-tool.com/team/olivia.html"}          }
          ,          {
            "@type": "Answer",
            "text": "Build a dedicated 718H mold component inspection checklist that adds three new checkpoints that are not in your current P20 inspection document. First, cross verify the steel mill heat number printed on the steel blank surface against the number on the material certificate, to make sure there is no mismatch that indicates a substituted blank. Second, take additional hardness measurement points at the gate impact position on each cavity insert, as this area receives the highest abrasion from incoming molten plastic, so even a small hardness deviation here will cause early wear. Third, do a quick acid etch test on a small non-critical edge of the component, the uniform fine grain structure of genuine 718H will show no dark spots or uneven color patches after etching, which is the easiest on site way to rule out low quality recycled material. All these checks can be done on site in your incoming quality control area, no third party lab testing is required for regular batches.",
            "upvoteCount": 0,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#suggestedAnswer-7",
            "datePublished": "2026-09-19T07:28:16Z",
            "author": {"@type": "Person","name": "David Zhang","url": "https://www.ok-tool.com/team/david.html"}          }
          ,          {
            "@type": "Answer",
            "text": "Compare the total material cost difference between 718H and other similar pre-hardened mold steel grades to avoid overpaying for unnecessary performance. You do not need to select the higher hardness 738H grade for your current ABS household appliance projects, as it adds 18% extra material cost while delivering only 5% higher abrasion resistance, which brings no tangible benefit for your production volume. If you do have 2 upcoming projects that will run 1 million + cycles of glass fiber reinforced PP parts, you can reserve the higher grade steel only for those specific projects, rather than applying it across all 12 projects. The 28% price gap between supplier quotes can be broken down clearly: low quotes usually use recycled feedstock material at 30% lower base cost, mid range quotes use genuine first grade mill 718H, and very high quotes usually add unnecessary heat treatment or extra machining operations that you do not actually need for your application. This breakdown will help you select the cost performance sweet spot that fits your exact project requirements.",
            "upvoteCount": 0,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#suggestedAnswer-8",
            "datePublished": "2026-09-19T06:47:05Z",
            "author": {"@type": "Person","name": "Daniel Yang","url": "https://www.ok-tool.com/team/daniel.html"}          }
          ,          {
            "@type": "Answer",
            "text": "When you design the 718H mold components, adjust the gate position and runner layout slightly to maximize the material strength advantage. 718H has better impact toughness than standard P20, so you do not need to add extra support ribs behind the gate area to prevent cavity deformation under high injection pressure. This will reduce the total steel volume of each mold insert by 7-10%, cutting the total material cost of the 718H components even further, to narrow the gap between your old P20 budget and new 718H budget. You can also integrate more small venting slots directly on the 718H cavity surface, as the material will not burr or chip easily during slot machining, which will reduce part burn defect rate without adding extra post machining work. For large size components over 300mm, you do not need to split the insert into multiple smaller pieces for hardness consistency, as 718H maintains uniform hardness across large cross sections, which reduces total mold assembly tolerance stack up risk significantly.",
            "upvoteCount": 0,
            "url": "https://www.ok-tool.com/qa/typical-lifespan-718h-mold-steel-components-high-volume-plastic-production.html#suggestedAnswer-9",
            "datePublished": "2026-09-19T06:28:47Z",
            "author": {"@type": "Person","name": "Kevin Liu","url": "https://www.ok-tool.com/team/kevin.html"}          }
                  ]
              }
    },
    {
      "@context": "https://schema.org",
      "@type": "BreadcrumbList",
      "itemListElement": [
          {"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.ok-tool.com/"},{"@type": "ListItem", "position": 2, "name": "Q&A", "item": "https://www.ok-tool.com/qa/"},{"@type": "ListItem", "position": 3, "name": "Injection Molding Q&A >", "item": "https://www.ok-tool.com/qa/injection-molding/<small>></small>"}          ,{"@type": "ListItem", "position": 4, "name": "What is the typical lifespan of 718H mold steel components for high volume plastic production?"}
      ]
    }
]
```