Plastic die steel
( classified according to ex-work degree of hardness):
1.
Hardness£ºPre hardening surface HS28-33
A. Variety: Korea HP-1A U.S.A. 1050 optimized Sweden 760
Japan S55C optimized
B. Characteristics£ºGood workability and greatly decreased
processing time
C. Applications: Toy mould steel, base material for precision
mould parts
2.
Hardness£ºPre hardening surface HS38-44
A. Variety: Korea HP-4A U.S.A. 4140 optimized Sweden HOLDEX
Japan SCM440 optimized German 2311
B. Characteristics£ºGood workability and wear resistance,
minor processing deformation
C. Applications: Large size mould board of auto-bumper,
die steel of automobile accessories, die steel for television
back cover, molds for large household electrical appliances
such as monitor molds
3.
Hardness£ºPre hardening surface HS41-47
A. Variety: Korea HP-4MA U.S.A. P20 optimized Sweden 718
Japan SNCM optimized German 2738
B. Characteristics£ºGood workability and wear resistance,
uniform hardness
C. Applications: Large size mould board with high surface
requirements for household electrical appliances, ordinary
molds such as household electrical appliance molds, steels
for ordinary communication product molds
4.
Hardness£ºPre hardening surface HSC37-41
A. Variety: Korea HAM-70 U.S.A. P21 optimized Japan DAIDO
NAK80
B. Characteristics£ºGood workability, wear resistance,
and surface finish, uniform hardness; favorable polishing
performance
C. Applications: Die steel for automobile roof lamp, transparent
molds for vegetable container illumination lamp of refrigerator,
mirror molds for mobile phone
5.
Variety: Annealing HRC23-55
A. Variety: Korea HEMS-1A U.S.A. 420 optimized German
2083ESR Sweden S136,S136H Japan SUS420J2 optimized
B. Characteristics£ºGood wear resistance, finish machine,
high precision
C. Applications: Transparent glass molds such as CD die
steel, monitor molds, tray molds, sun glasses molds etc.
