C 0.04 ~ 0.10 si ≤ 0.80 Mn ≤ 0.40 P ≤ 0.020 S ≤ 0.015 Balanço de ni Cr 18.00 ~ 21.00 TI 1.80 ~ 2.70
Al 1.00 ~ 1.80 Co ≤ 2.00 Fe ≤ 1.50 Cu ≤ 0.20 B ≤ 0.008 ZR - PB -