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: 10B18,10B21,10B28,10B30,10B33,10B33-FY,10B38,Q10B21-C、Q10B23M-C、Q10B21-DW、Q10B21-B、Q15B25M-MT、Q37MnB5、SAE10B18、SAE10B21、15B25、MnB120H、MnB123H、G33B2-B
Specifications: φ5.5~42mm
Applied Standard:  Q/XG 137
Characteristics: The products are mainly used to produce fasteners of class 8.8 ~ 12.9.
Applications: Common partsFastener steelCommon fastenerHigh strength fastenerconstruction fastener steelsteering system parts
Use of Products: 10B21,10B28,10B30,10B33 and 10B38 are mainly used to produce fasteners of class 8.8 ~12.9, It has of uniform-chemical composition, low percentage of harmful elements, high purity, slight decarburization, good surface quality, good cold heading performance, low rigidity. They also has characteristics of high intensity and good hardenability after heat treatment. 10B21 gains the gold-cup of the metallurgical product actual quality in 2008. The three steels were identified the lead level of China. 10B21 has been sold the enterprises of the east and the south of China that product the standard parts. And the steel is widely used to product fastener for auto. They have a good reflection.