---
title: "718 Steel for Hand Tool Molds: Durability and Cost Analysis - OK TOOL"
description: "In the competitive market of hand tools, selecting the right mold material like 718 steel determines surface finish and tooling lifespan. This analysis explores how OK TOOL utilizes DIN 1.2738 for high-quality plastic component production."
url: "https://www.ok-tool.com/manufacturing/718-steel-hand-tool-molds.html"
language: "en"
type: "Article"
category: "Hardware Manufacturing Guide"
datePublished: "2026-09-09"
dateModified: "2026-09-09"
brand: "OK TOOL"
manufacturer: "OK TOOL"
image: "https://static.ok-tool.com/uploads/industry/mold/m8iYhKkhHWHMC.webp"
---

# 718 Steel for Hand Tool Molds: Durability and Cost Analysis

Engineering specifications for hand tool components often list "Material 718" as a standard requirement for mold bases and cavities.On paper,it guarantees a pre-hardened,high-grade steel capable of delivering a polished finish.However,on the shop floor,the reality involves balancing the pre-hardened benefits of DIN 1.2738 against its machining challenges and the specific texturing demands of ergonomic grips.For procurement managers and product developers sourcing hand tools or components,understanding the practical implications of this material is critical for managing lead times and tooling costs.

## Understanding Material 718 in the Context of Hand Tools

![718 Steel for Hand Tool Molds: Durability and Cost Analysis](https://static.ok-tool.com/uploads/industry/mold/m8iYhKkhHWHMC.webp)

It is important to first clarify a common misconception in the industry.Material 718 (DIN 1.2738) is not a steel used to manufacture the metal blade or shaft of a hand tool; it is a premium mold steel used to manufacture the injection molds that produce the plastic handles,casings,and housings for those tools.When a drawing specifies 718,it is referring to the tooling construction,not the final product material.OK TOOL utilizes this steel extensively in its injection molding operations to produce high-quality plastic components for general hardware and tools.

Material 718 is essentially a upgraded version of the standard P20 steel.It is supplied in the pre-hardened state,typically at a hardness range of 330–370 HB (Brinell) or roughly 36–40 HRC (Rockwell C).This pre-hardening eliminates the need for additional heat treatment after the mold is rough-machined,significantly reducing the risk of deformation and shortening the delivery cycle.For hand tool manufacturers who require ergonomic,textured grips on their plastic handles,718 offers an excellent balance of polishability and toughness.

## Why 718 is Preferred for Plastic Tool Handles

The production of plastic handles for screwdrivers,pliers,and power tools places unique demands on mold materials.The cavity surface must be capable of achieving a high gloss to facilitate release,yet it must also be tough enough to withstand the abrasive nature of glass-filled polymers often used for reinforced tool handles.Furthermore,the mold must accept complex etched textures to provide non-slip grips for end users.

From a manufacturing perspective,718 steel addresses these needs through specific material characteristics.Its uniform hardness ensures consistent polishing results across the cavity surface,which is vital for achieving a uniform appearance on matte or gloss finishes.Unlike standard P20,which may have soft spots leading to pitting during polishing,718 offers better homogeneity.Additionally,its higher toughness compared to standard mold steels reduces the risk of chipping around sharp corners in the mold,which is a common failure point when molding glass-fiber reinforced plastics used in heavy-duty hand tools.

### Key Properties of DIN 1.2738

When evaluating 718 for a new hand tool project,engineers focus on several distinct properties that impact the molding process and the final part quality.

- **Pre-hardened Structure:** Supplied at roughly 36–40 HRC,allowing for direct machining and EDM (Electrical Discharge Machining) without the risk of dimensional changes caused by subsequent heat treatment.
- **Polishability:** Capable of being polished to a high mirror finish (SPI A1 or A2 grade),which is necessary for high-gloss tool casings or for preparing the surface for detailed texturing.
- **Good Machinability:** Despite its higher hardness compared to standard P20,it maintains acceptable machinability,though it requires more robust tooling and slower speeds during the CNC milling process.
- **Wear Resistance:** Offers superior resistance to abrasion compared to standard P20,extending the mold life when molding abrasive materials such as PA66 (Nylon) with glass fiber fillers.
- **Dimensional Stability:** The vacuum degassed and remelted process used in high-quality 718 production minimizes porosity and internal voids,ensuring the mold maintains cavity dimensions under high injection pressure.

## Process Feasibility and Machining Considerations

![718 Steel for Hand Tool Molds: Durability and Cost Analysis](https://static.ok-tool.com/uploads/industry/default/rsSxgFBbGzPAC.webp)

While 718 offers superior performance,it introduces specific constraints on the manufacturing workflow that buyers must be aware of.Because the steel is harder than standard P20,machining times increase.For OK TOOL,this means adjusting cutting parameters and utilizing advanced carbide tooling to maintain efficiency.If a buyer is pushing for an aggressive lead time,the choice of 718 can sometimes conflict with the delivery schedule unless the machining capacity is readily available.

Another critical shop-floor consideration is welding.During the mold trial phase,engineering changes are often required,necessitating welding modifications on the cavity.718 is weldable,but it requires strict pre-heating and specific welding rods to prevent cracking in the heat-affected zone.Improper welding on 718 can lead to sink marks or hard spots that polish differently from the base material,resulting in visible defects on the final plastic handle.A qualified injection molding partner will have established procedures for these repairs to ensure the integrity of the mold surface is maintained.

## Material Comparison and Selection Logic

Selecting the correct mold steel is a decision that balances cost,volume,and part requirements.While 718 is a robust choice for hand tools,it is not always the default.Understanding the alternatives helps procurement teams make informed decisions rather than over-specifying and incurring unnecessary costs.

| Material Grade | Hardness (HRC) | Polishability | Wear Resistance | Typical Application in Hand Tools | Cost Factor |
| --- | --- | --- | --- | --- | --- |
| P20 (3Cr2Mo) | 28 - 32 | Good | Fair | Low-volume prototypes,non-critical handles | Low |
| 718 (DIN 1.2738) | 36 - 40 | Excellent | Good | Standard production molds for textured/gloss handles | Medium |
| NAK80 (PDS5) | 37 - 43 | Superior | Good | High-gloss clear parts,ultra-fine detail | High |
| H13 (Hot Work) | 46 - 50 (Hardened) | Poor | Excellent | Die casting for metal tool components | High |

For the majority of plastic hand tool components,718 sits in the "sweet spot." It is significantly more durable than P20,ensuring that the mold can withstand the production volumes required for general hardware distribution,yet it is more cost-effective than NAK80.If the hand tool handle requires a deep,heavy texture for grip,718 holds the etching well during the molding cycles,whereas softer steels might wear down over time,causing the texture to fade on the parts produced later in the mold’s life.

## Quality Control and Risk Management

When sourcing molds or plastic components from a supplier using 718 steel,quality control must focus on the verification of the material itself.Because 718 is a premium grade,there is a market risk of suppliers substituting it with lower-grade pre-hardened steels that do not offer the same polishability or consistency.

At OK TOOL,the verification process involves checking the hardness uniformity across the mold block.Variations in hardness can lead to inconsistent polishing,resulting in "orange peel" effects on the surface of the plastic handle.Furthermore,the steel must be free of internal porosity.Porosity in 718 can trap gas during the injection molding process,causing burn marks or surface blemishes on the plastic part,which are particularly visible on glossy black or red tool handles common in the hardware industry.

### Supplier Evaluation Checklist

To ensure the manufacturing partner is capable of handling 718 effectively,procurement teams should look for the following capabilities:

- **Material Certification:** Ability to provide mill certificates verifying the steel is DIN 1.2738 compliant.
- **Polishing Competency:** Evidence of in-house polishing capabilities,as 718 requires skilled labor to achieve its maximum potential.
- **Texturing Partnerships:** Established relationships with reputable texturing vendors,as 718 is frequently used for laser etching or chemical etching of grip patterns.
- **Welding Protocols:** Defined procedures for mold modification to prevent damage to the pre-hardened structure.

## Strategic Sourcing and Cost Implications

From a commercial perspective,specifying 718 steel is an investment in tool life and part quality.For a standard hand tool project with a lifecycle of 3 to 5 years,the initial higher cost of 718 compared to P20 is often recovered through reduced maintenance cycles and lower reject rates.The superior polishability means the mold requires less frequent cleaning and polishing to maintain part appearance,reducing machine downtime.

However,for short-run production or highly cost-sensitive commodity tools,P20 may remain a viable option if the texture requirements are not aggressive.The decision should be based on a total cost of ownership calculation rather than just the upfront tooling quote.When engaging with a manufacturer like OK TOOL,discussing the expected annual volume and the desired surface finish of the plastic components allows the engineering team to recommend the most appropriate grade of steel—whether that is 718 or a close alternative—ensuring the project remains commercially viable while meeting quality standards.

In conclusion,while 718 is often treated as a standard line item on a bill of materials,its impact on the manufacturability and aesthetics of hand tools is profound.It bridges the gap between the durability required for mass production and the surface quality demanded by professional end users.Understanding this material enables better communication between buyers and manufacturers,ensuring that the final product not only meets specifications but performs reliably in the field.

## Related Resources

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

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