国产午夜一级,欧美三级午夜理伦三级在线观看,国产精品另类激情久久久免费,一级毛片免费高清,99精品黄色,日韩超级大片免费看国产国产播放器,亚洲精品日韩一区二区电影

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.