欧洲精品乱码久久久久蜜桃,72式性无遮挡在线观看视频,夜夜操夜夜干,一区二区三区在线免费观看,色91av,欧美激情片一区二区,91cn国产在线

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.