DAC55 Steel

DAC55 Steel is a high-performance hot work tool steel widely used in die casting, forging, and extrusion applications requiring strong heat resistance and toughness.

Send Inquiry

Product Introduction

DAC55 High-performance Hot Work Tool Steel – High Toughness & Enhanced Thermal Fatigue Resistance

DAC55 Steel is a high-performance hot work tool steel widely used in die casting, forging, and extrusion applications requiring strong heat resistance and toughness.
As an improved-grade alternative to standard SKD61/H13, DAC55 delivers better thermal stability, higher purity, and stronger thermal fatigue resistance, making it suitable for molds exposed to severe temperature cycling and mechanical impact.

Product Parameters (Specification)

Property	Description
Material Type	High-performance hot work tool steel
Hardness	HRC 46–52
Working Temperature	Up to 600°C
Microstructure	Uniform tempered martensite with refined carbides
Heat Treatment	Vacuum quenching + double/triple tempering
Application	Die casting molds, extrusion dies, hot forging tools

Product Features & Applications

High Hardness (HRC 46–52)

Ensures excellent wear resistance and long service life for hot work tooling.

Enhanced Thermal Fatigue Resistance

DAC55 is optimized to withstand repeated thermal cycling common in aluminum and zinc die casting processes.

Excellent Hot Strength & Stability

Retains mechanical integrity and dimensional accuracy under high-temperature operations.

Improved Toughness & Crack Resistance

Reduces risk of chipping and cracking during heavy impact or thermal shock.

Suitable for Heavy-duty Hot Work Applications

Preferred for aluminum die casting molds, hot forging dies, extrusion tooling, and high-temperature plastic molds.

Product Details

DAC55 Steel is produced through advanced melting and refining methods including vacuum degassing and precision forging, ensuring a clean and homogeneous structure.

Its balanced alloy composition provides excellent hardenability, heat crack resistance, and mechanical toughness.

Thanks to its reliable hot work performance and long tool life, DAC55 Steel is widely chosen for industrial applications demanding stable high-temperature performance and cost-efficient durability.

Product Qualification

Manufactured following ISO 9001:2015 quality standards
100% ultrasonic tested for internal soundness
High-purity metallurgical process ensures consistency
Comparable to SKD61 / AISI H13 / DIN 1.2344

FAQ

Q1: What hardness does DAC55 achieve after heat treatment?

DAC55 reaches HRC 46–52 after vacuum quenching and tempering.

Q2: What is the main advantage of DAC55 compared to SKD61/H13?

DAC55 offers improved thermal fatigue resistance and better toughness, resulting in longer tool life.

Q3: What applications commonly use DAC55?

Die casting molds, extrusion tools, hot forging dies, and high-temperature injection molds.

Q4: Can DAC55 undergo surface nitriding?

Yes. Nitriding enhances surface hardness and wear resistance while preserving core toughness.

Hot Tags: dac55 steel, China dac55 steel manufacturers, suppliers, factory, AISI H13 Steel, DIN 1 2311, DAC55 Steel, DIN 1 2343, 2344 Steel, Pre Hardened Mold Steel

FS139 Steel

No Information