日韩亚洲一区中文字幕在线,黄色视频免费观看网站,9191精品国产免费久久,欧美日韩三四级视频在线观看,亚洲国产成人久久综合碰,国产午夜av毛片久久,真人抽搐一进一出gif免费木瓜视频

Main Products
Products Grade: 60Si2MnA,60Si2MnA-1
Specifications: φ6.5-20mm
Applied Standard:  agreement
Characteristics: The wire rod of 60Si2Mn is used to produce spring wire, absorber spring and spring fittings of vehicle.
Applications: Railway fastenerSpring steel
Use of Products: The wire rod of 60Si2Mn, which is a high performance steel grade of Si-Mn spring steel, has characteristics of uniform-chemicalcomposition, low gas content and harmful elements, high purity, high elasticity attenuation resistance, slight decarburisation, good drawability. Main composition of microstructure is sorbite. The product has good mechanical and fatigue properties after quench and temper.