Product Description We mainly supplied the structural alloy steel as follows, AISI/SAE 5120, AISI/SAE 5130, AISI/SAE 5135, AISI/SAE 5140, AISI/SAE 5145, AISI/SAE 5150, AISI/SAE 4118, AISI/SAE 4135, AISI/SAE 4140, AISI/SAE 8620, AISI/SAE 4340, AISI/SAE 6150, AISI/SAE 5115, AISI/SAE 5120, AISI/SAE 4142, AISI/SAE 3140, AISI/SAE 52100
