Daido Steel - Steel Chart
DAIDO Plastic Mould Steel
Material Grade Hardness Characteristics Applications
PAC5000 Prehardened to HB336 - 371 Patent composition to reduce cracking during welding process; homogenous structure and hardness; good texturing property; can be polished up to #5000 Plastic injection mould for medium production run with high texturing requirement such as housing for Office Equipment, Copier, Printer; not suitable for moulding corrosive resins
NAK80 Prehardened to HB344 - 400 Age hardening steel with high delivery hardness; excellent texturing and EDM properties; can be polished up to #8000 Plastic injection mould for medium production run with high polishing and texturing requirement; not suitable for moulding corrosive resins
PAT 868S Annealed to HB229(max) Special alloying design and steel making process to provide the material with integrated properties of high toughness, anti-corrosion and mirror polishability Plastic injection mould with the adoption of rapid heat and cool technology, mould insert or slider for long production run with complicated mould design and high polishing or texturing requirement
S-STAR Prehardened to HB290 - 330 High purity with fine microstructure, can be polished to mirror finish. Excellent corrosion resistance and low deformation during heat treatment Plastic injection mould with small to medium size, long production run and high polishing requirement, e.g. PMMA, PC, resins such as PVC, PA, POM or additives with corrosive property, machine part for food processing machinery
S-STAR-A Annealed to HB229(max) Plastic injection mould with small to medium size, medium production run and high polishing requirement, e.g. PMMA, PC, resins such as PVC, PA, POM or additives with corrosive property, machine part for food processing machinery

DAIDO Hot Work Steel

Material Grade Hardness Characteristics Applications
DHA1 Annealed to HB229(max) Good toughness and resistance to thermal fatigue Small size Zn alloy die casting die, component for die casting die, Al alloy extrusion die,through-hardened plastic injection mould
DH31-EX Annealed to HB235(max) Excellent through-hardening property and toughness, excellent resistance to thermal shock and thermal fatigue, high hot strength and fracture toughness, superior resistance to heat checking and hot erosion Big sizes Al and Mg alloy die casting dies with long production run

DAIDO Cold Work Steel

Material Grade Hardness Characteristics Applications
DC53 Annealed to HB255 Toughness is better than that of conventional SKD11; hardness can be attained to around HRC62 after high-temperature tempering, which massively reduces the risk of cracking during wire-cutting (WEDM) or grinding processes; suitable for surface treatment Cold work dies for stamping, forming, deep drawing, rolling