日本不卡高清视频v中文字幕观看互动交流_手机在线看片欧美日韩_日韩激情一级无码毛片_国产真实尾随入室迷晕丝袜美女_久久天天躁狠狠躁夜夜免费观看

Main Products
Products Grade: SWRCH6A,SWRCH7A,SWRCH8A
Specifications: φ5.5～42mm
Applied Standard:  Q/XG 114
Characteristics: adapted for all kinds of low intension standard-part and nonstandard -part.
Applications: Common partsCommon fastenerconstruction fastener steel
Use of Products: Steel SWRCH6A and SWRCH8A are the common using steels produced the Fasteners of low intension and big deformation and the nonstandard-part. The productions have advantages of steady composition, low harmful element, high pure steel and small surface defect. Using them, it is unnecessary to heat treatment and the rate craze of cold forging is low. They are used in the industry of family electricity, traffic, mechanism and transport.The steel grade gains the gold-cup of the metallurgical product actual quality in 2007.