婷婷五月伊人,亚洲国产精品免费,日韩午夜福利在线观看,一区二区午夜按摩,久久精品国产免费,国产免费a级片全部,成人黄片在线播放

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.