Shanxi Jianlong successfully develops American Standard boron-containing cold heading steel 10B21

Recently, Shanxi Jianlong put boron-containing cold heading steel wire 10B21φ6.Asian Metal Copyright8-level inner hexagonal high-strength bolts.Asian Metal Copyright5mm, φ8mm and φ10mm on the market, which was successfully used in the production of 8.Asian Metal Copyright8-level inner hexagonal high-strength bolts.Asian Metal Copyright8-level inner hexagonal high-strength bolts.
.Asian Metal Copyright5mm, φ8mm and φ10mm on the market, which was successfully used in the production of 8Asian Metal Copyright