国产欧美激情日韩成人三区|成A∨人片在线观看无码|91欧美精品午夜性色福利在线|亚洲一级黄色,男人的天堂久久久,久久综合操,国产超级乱淫视频播放免费

Main Products
Products Grade: 35Si2Cr,45Si2Cr
Specifications: Φ10-17 mm
Applied Standard:  agreement
Characteristics: This product has characteristics of reasonable chemical composition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality, consistent mechanical property, fine grain size, good hardenability, and fitness of strength and toughness etc.
Applications: Railway pilow wirePC steelbar steel
Use of Products: This product is mostly used to produce PC bar and wires for high speed railroad crosstie with good straightness, high strength and toughness, low relaxation and good hydrogen-brittleness resistance.