Standard: GB/T1381D-2007; ISO5832-2; ASTM F 67; ISO5832-3; ASTM F136; Tolerance: h6, h7, h8, h9 1. The Metallographic rating of TA3, Gr3 is above 7, the Tensile strength achieves above 585MPa; stable Organizational Structure, excellent performance, otherwise, we can manufacture products according to client's requirements.2. The Metallographic rating of TC4, TC4ELI, Gr5, Gr5ELI is within A5, the ...