日本中出在线观看,日韩亚洲精品视频,欧美成人三级精品,一区二三区视频电影,日本伊人色综合网,三级全黄的视频在线观看,三级全黄的视频在线观看

Main Products
Products Grade: SCM415、SCM435,SCM435-M,SCM440,GSCM435-A,G-SCM435-B,GSCM440-A
Specifications: φ5.5～42mm
Applied Standard:  Q/XG 114
Characteristics: The wire rod is used to produce cylinder nut and bolt ,rail bolt, tud bolt of class 12.9..
Applications: High strength fastenerCommon partsFastener steel
Use of Products: SCM435 is a commen steel grade which used to produce high strength bolt of class 12.9.This product has characteristics of uniform-chemical composition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality. After spheroidize annealing, this product has the characteristics of good cold heading properties ,stable heat-treatment properties and good hardenability. SCM440 is similar to SCM435,but higher strength and hardenability.