Good Machinability & Polishabiliy Pre-hardened 1.2738 Forged
Hardness: Pre-hardened 33-37 HRC
1) Suitable for molds with high gloss.
2) After the mold steel nitride surface hardness can reach 650 ~
700HV, the number of products can reach more than 1 million die.
Die steel for plastic moulds with a thickness of about 400 mm plus.
If uniform hardness, elevated toughness and polishability is
required in the contour as well. Moulds for TV housings and rear
walls, copier housings; shock-absorber moulds;moulds for dashboards
and large outside body parts; waste bin moulds; pressure casting
Stock items 15-20 days; customized items 30-50 days.
Packing: Standard export packing; customers' special requests are accepted
1.2738 forged steel block stock details
1. High quality and professional manufacturer
2. Advanced equipments for testing and manufacturing
3. Customized service according to your inquiry
4. Short lead time
5. Good after-sale service
1.2738 tool steel is pre-hardened plastic mold steel.
1.2738 steel using advanced die steel refining technology for the
vacuum melting of Cr-Ni-Mo alloy steel.
The steel has excellent polishing and photo etching flower
performance; excellent workability; good wear resistance; uniform
hardness of large molds, dense tissue; no quench cracking and heat
treatment deformation risk, without heat treatment, shorten the
mold making cycle; good Surface nitriding performance; can be
surface flame hardening treatment to enhance the mold surface
hardness and wear resistance.
Mold before quenching, must be fully softened annealing. After
quenching should be tempered, slow heating.
After EDM EDM, should be a small current, high frequency, so as not
to damage the mold. After discharge, the mold surface should be
ground to remove the "spark white layer" and then tempered at 500 °
C to remove the stress.
Tempering of the mold after grinding process, in order to prevent
grinding cracks and surface softening, we should pay attention to:
full cooling; grinding pressure appropriate; processing technology
The steel pre-hardened steel has good polishing properties and is
usually polished with alumina or gypsum. The first is the rough
throw, and then use more and more fine abrasive polishing, abrasive
polishing for each change direction, the final polishing time
should not be too long, otherwise it will affect the mold surface
Nitriding can increase the mold surface hardness, improve wear
resistance and corrosion resistance. Although the steel has been
pre-hardened, but can still heat treatment to improve the hardness.