国产福利电影一区二区三区,中文无码精品一区二区三区|国产精品色哟哟网站|欧美国产成人精品 _青青草久热国产视频_青青草a国产免费观看_青青草久热精品视频在线观看

News and information

News

PM-HSS S390 for Involute Gear Hob and Gear Hobber Cutter

2023-07-08 11:37:36 jiangxingTools 2000

PM-HSS S390 for Involute Gear Hob and Gear Hobber Cutter

This grade is PM steels with many positive usage properties, S390 is with good red hardness, compressive strength and wear resistance.

Chemical composition: C-1.64, Cr-4.8, Mo-2.0, V-4.80, W-10.40, Co-8

Standards of PM-HSS 

Hanrdess of S390: HRC 66-68

The application of PM-HSS S390 is used for involute gear hobs, gear hobber cutter, gear hobbing tools, chain sprockt hob, worm wheel hobs and gear shaper cutters.