亚洲国产精品99久久久久久久久,乱伦家庭AV,国产精品美女久久久久AV电影,亚美欧AV

Main Products
Products Grade: GSCM435-C、QSCM435-C、QSCM435-C（SCM435））、QSCM435-MT
Specifications: φ5.5-42mm
Applied Standard:  agreement
Characteristics: high strength fasteners for engineering vehicles.
Applications: high-end parts
Use of Products: GSCM435-C 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 harmful elements, high purity, low decarburisation, good surface quality. Good spheroidization quality, low crack ratio in cold heading,stable heat-treatment properties and uniform hardenability.