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Pre Hardened Mold Steel

SW718H-P is a premium pre hardened mold steel designed for molds that require high polishability, uniform hardness, and excellent machinability.

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Product Introduction

SW718H-P Pre-hardened Plastic Mold Steel – High Purity & Excellent Polishing Performance

SW718H-P is a premium pre hardened mold steel designed for molds that require high polishability, uniform hardness, and excellent machinability.
It is widely used for plastic injection molds in automotive, household appliances, and office equipment, featuring excellent dimensional stability and durability.
Delivered in a pre-hardened condition, it can be directly used for mold cavity machining, reducing heat treatment costs and shortening production cycles.

Product Parameters (Specification)

Property	Description
Material Type	Pre-hardened plastic mold steel
Hardness	HRC 33-38
Heat Treatment	Supplied pre-hardened, can be nitrided or surface polished
Density	7.85 g/cm³
Surface Finish	Mirror polishable / Etching available
Application	Injection molds for home appliances, automotive interiors, and electronics

Product Features & Applications

Excellent Hardness Uniformity

The material is produced with a large forging ratio, ensuring uniform core hardness and compact internal structure.

High Purity & Clean Microstructure

Advanced refining process minimizes inclusions and improves polishing performance.

Superior Polishing & Etching Properties

Suitable for mirror-finished and photo-etched mold surfaces.

Pre-hardened Condition

Eliminates the need for quenching, reducing production time and cost.

Wide Application Range

Ideal for molds used in TV housings, washing machine drums, copier parts, bumpers, dashboards, and door panels.

Product Details

Each block of SW718H-P undergoes vacuum degassing, forging, and heat homogenization to achieve stable metallurgical quality.
Uniform hardness and excellent machinability enable precise CNC milling and EDM processing for complex mold cavities.
The steel's fine microstructure ensures long service life and consistent mold performance in high-volume production environments.

Product Qualification

Produced under ISO 9001:2015 quality management system.
Manufactured with vacuum refining + large forging ratio (≥6) to ensure internal compactness.
100% inspected for hardness, microstructure, and ultrasonic integrity before delivery.
Conforms to international mold steel standards (HASCO / DME / AISI P20+Ni equivalent).

FAQ

Q1: What's the hardness of SW718H-P?

It is pre-hardened to HRC 33–38, ideal for direct mold machining without heat treatment.

Q2: Can this steel be polished to a mirror finish?

Yes, the steel's high purity and fine microstructure allow excellent mirror polishing and laser texturing.

Q3: What are its main applications?

It's mainly used for molds of automotive interiors, household appliances, and office plastic components.

Q4: Is SW718H-P equivalent to any international grade?

It is comparable to AISI P20+Ni or DIN 1.2738 pre hardened mold steel.

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DIN 1.2738

NAK80 Steel