Chemical Composition of Forged Fittings

Grade / Standard C (%) Mn (%) Si (%) P (%) S (%) Cr (%) Ni (%) Mo (%) V (%) Cu (%) Nb (%) Ti (%) W (%)
ASTM A182 F304 ≤ 0.08 ≤ 2.00 ≤ 1.00 ≤ 0.045 ≤ 0.030 18.0 – 20.0 8.0 – 11.0 Austenitic Stainless Steel
ASTM A182 F304L ≤ 0.03 ≤ 2.00 ≤ 1.00 ≤ 0.045 ≤ 0.030 18.0 – 20.0 9.0 – 13.0 Low Carbon Stainless Steel
ASTM A182 F316 ≤ 0.08 ≤ 2.00 ≤ 1.00 ≤ 0.045 ≤ 0.030 16.0 – 18.0 10.0 – 14.0 2.0 – 3.0 Corrosion-Resistant Stainless Steel
ASTM A182 F316L ≤ 0.03 ≤ 2.00 ≤ 1.00 ≤ 0.045 ≤ 0.030 16.0 – 18.0 10.0 – 14.0 2.0 – 3.0 Low Carbon
ASTM A182 F321 ≤ 0.08 ≤ 2.00 ≤ 1.00 ≤ 0.045 ≤ 0.030 17.0 – 19.0 9.0 – 12.0 0.40 – 0.70 Stabilized Stainless Steel
ASTM A182 F347 ≤ 0.08 ≤ 2.00 ≤ 1.00 ≤ 0.045 ≤ 0.030 17.0 – 19.0 9.0 – 13.0 0.40 – 0.70 Stabilized with Columbium
ASTM A182 F11 0.05 – 0.15 0.30 – 0.60 0.50 – 1.00 ≤ 0.030 ≤ 0.030 1.00 – 1.50 0.44 – 0.65 1¼Cr-½Mo Alloy Steel
ASTM A182 F22 0.05 – 0.15 0.30 – 0.60 ≤ 0.50 ≤ 0.045 ≤ 0.030 1.90 – 2.60 0.87 – 1.13 2¼Cr-1Mo Alloy Steel
ASTM A182 F5 0.05 – 0.15 0.30 – 0.60 0.50 – 1.00 ≤ 0.030 ≤ 0.030 2.25 – 2.75 0.50 – 1.00 0.90 – 1.10 Chromium-Molybdenum Steel
ASTM A182 F9 0.05 – 0.15 0.30 – 0.60 0.50 – 1.00 ≤ 0.030 ≤ 0.030 5.00 – 5.50 0.80 – 1.20 0.90 – 1.20 Alloy Steel for High-Temperature Service
ASTM A182 F91 0.08 – 0.12 0.30 – 0.60 ≤ 0.50 ≤ 0.020 ≤ 0.010 8.0 – 9.5 0.85 – 1.05 0.30 – 0.50 Modified 9Cr-1Mo Alloy Steel
ASTM A182 F51 ≤ 0.030 ≤ 2.00 ≤ 1.00 ≤ 0.030 ≤ 0.020 21.0 – 23.0 4.5 – 6.5 2.5 – 3.5 Duplex Stainless Steel (2205)
ASTM A182 F53 ≤ 0.030 ≤ 1.20 ≤ 0.80 ≤ 0.035 ≤ 0.020 24.0 – 26.0 6.0 – 8.0 3.0 – 5.0 Super Duplex Stainless Steel (2507)
ASTM A182 F60 ≤ 0.30 1.00 – 1.50 0.50 – 0.80 ≤ 0.035 ≤ 0.030 11.0 – 13.0 4.5 – 6.0 0.25 – 0.35 Corrosion Resistant Alloy Steel
ASTM A182 F44 ≤ 0.03 ≤ 1.00 ≤ 1.00 ≤ 0.035 ≤ 0.020 18.0 – 20.0 6.0 – 7.5 3.0 – 4.0 Super Duplex Alloy Steel
ASTM A182 F53 ≤ 0.03 0.50 – 1.00 0.30 – 0.60 ≤ 0.030 ≤ 0.010 25.0 – 28.0 6.0 – 7.5 4.0 – 5.0 Super Duplex Stainless Steel (2507)