Product Name:Pre-hardened Plastic Mould STEEL ---GB 3Cr2MnNiMo
Similar steel grades:
1. prehardened to 284-332HB(30-36HRC),it is easy maching
,deformation effective by hardened could off
2. EFFER on ESR steel echibitws a high purity. It is suited for
spark erosion and mirror-like production
3. there is uniform hardness over over cross-section of large size.
4. can harden again to 40HRC.
used for long life or large size plastic mould and want polish to
mirror like plastic dies. Suitable for manufacturing low melting
point alloy die casting., thermoplastic blow molding mold. heavy
mold main components.
Forge: at 900℃-1100℃ Cool slowly and anneal immediatedly
Anneal: at 710℃-740℃ Cool slowly in furnace
Stress Relieve: at to 530℃-580℃ Cool in still air
Harden: Preheat at 500℃-550℃ raise to 840℃-880℃ Cool in air, iol or
into salt bath held at 200℃-300℃ and then air or oil cooling
according to the steel shape and size.
T: 70-320 W: 90-1000mm
T: 50-320 W: 90-1000mm
KEY WORDS: SPECIAL STEEL, PLASTIC MOULS STEEL, STEEL BAR, STEEL
FLAT, PRE-HARDENED PLASTIC MOULD STEEK . ASTM P20+Ni, DIN 1.2738,
GB 3Cr2MnNiMo, ASSAB 718, M238