亚洲天天骚女现场视频,www.888日本,亚洲第一天堂无码专区日韩,免费一级黄片视频在线观看无码,亚洲日韩线精品一区一区一区,一级无码日韩毛片,国产免费美女被艹视频

Main Products
Products Grade: 36MnB4、20MnB4
Specifications: φ5.5～40mm
Applied Standard:  agreement
Characteristics: This product is mainly used to produce high strength self piercing rivet
Applications: Common partschassis partsHigh strength fastener
Use of Products: The 36MnB4 product produced by Xingtai steel has the advantages of stable composition, high purity of steel, small decarburization layer, less surface defects and good hardenability.It’s used to make high strength Self Piercing Rivets(SPR rivets) for aluminum vehicle body by a customer of XINGTAI STEEL Which reflects that the product has stable performance, good cold heading performance, good strength and toughness after tempering, and can meet the use requirements of the final product.