... based on the customer's requirement. 2. Chemical Composition C Si Mn P≤ S ≤ Ni Cr Nb≤0.08 ... 0.0309.00-13.0017.00-19.00 ≥10*C% 3. Finished goods condition: hot forging/hot rolling ... 's requirement. 7. UTS: According to SEP 1921 C/c, D/d, E/e; A388 or GB/T ... (D2), 4Cr5MoSiV1 (H13), NAK80 and 3Cr2Mo (P20)5) A-Structural Steel: 12Cr1MoV, 12CrNi3A, 34CrNi3Mo, 45CrNiMoVA, 40CrNiMoA, 5CrNiMo, 20Cr2Ni4A and FD ...