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GB/T 3077 30CrMnSiA alloy steel katalor special steelGB/T 3077 30CrMnSiA alloy steel. 20171215. Font Size +Back to list. 30CrMnSiA is a medium carbon with high strength. 30CrMnSiA has high strengthgood hardenability and sufficient toughness after quenching and tempering. Meanwhile, 30CrMnSiA has good process ability, small processing deformation and good fatigue resistance and it Steel Pipe - GB/T 3077 35CrMo Alloy Steel SupplierSeamless pipe has a wide application. Generally, seamless pipe is produced from carbon steel, low alloy steel and alloy steel. It is mainly used for fluid transmission and structural parts. ERW Pipe ERW Pipe OD 21.3mm-66.m, Wall Thickness 1.0mm-16mm ERW pipe production technical is simple and it can be produced continuously and quickly.