We require alloy steel bar from china In two grade. Specification given are as: - 1) Grade--K-310 SIZES IN DIA: : (A) 150MM, 160MM, 180MM & 220MM CHEMICAL COMPOSITION (APPROX) COMPOSITION (A) C 0. 86-0. 90% SI 0. 26% Mn 0. 41% P 0. 021% S 0. 009% Cr 2-2. 5% Mo 0. 25% V 0. 08% Ni 0. 04% Cu 0. 03% 2) Grade--SAE-52100 SIZES IN DIA: : (B) 260MM, 290MM, 310MM, 330MM, 350MM, 575MM & 600MM COMPOSITION (B) C 0. 90% SI 0. 20% Mn 0. 30% P 0. 011% S 0. 010% Cr 1. 53% Mo------ V------- Ni 0. 11% Cu 0. 15% Please send your reply ASAP.