JIS A681 Hot Work Tool Round Bar H21 Die Steel Mold Steel
Laiwu Xincheng Metal Co., Ltd.- Type：Alloy Steel Bar
- Standard：AISI, ASTM, GB, JIS, DIN, BS
- Technique：Hot Rolled
- Application：Tool Steel Bar, Die Steel Bar
- Surface Treatment：Polished
- Alloy：Alloy
Base Info
- Model NO.：JIS A681 H21 tool steel
- Special Use：Mold Steel, Hot Work Steel
- Products：Tool Steel Bar
- Grade：H21 SKD5 1.2581 3Cr2W8V
- Ut Standard：Sep 1921 C,C
- Transport Package：Sea Worthy
- Trademark：Laiwu Xincheng
- Origin：China
- Production Capacity：3000tons,Month
Description
5.Heat Treatment of H21 Steel
Forging Of H21 steel-hot work alloy tool steel
Heat to 900-1100 °C(1652-2012°F),forged temperature not below 843°(1550°F)
Annealing of H21 Tool steel
Slowly heated to 800~850 ºC(1472~1562°F) and allow enough times, let the steel to be thoroughly heated, Then cool slowly at Maximum of 4°C(40°F)per hours. The H21 tool steel will get MAX 235 HB (Brinell hardness).
Hardening of H21 tool steel
H21 steels should be heated uniformly to 1050-1100°C (1922-2012°F) until completely heated through. If needed, the steels can be preheated at 300-500°C (572-932°F). About 30 min/per 25 mm of ruling section is to be provided and then the steels should be immediately quenched in air.
Tempering of H21 tool steel
Tempering of H21 steels is performed at 600-650°C (212-662°F), Soak well at the selected temperature and soak for at least one hour per 25mm of total thickness. Get Rockwell C hardness of 50 MAX..
