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ASTM A105: American Society for Testing and Material
Carbon Steel Forgings for Piping Applications
Chemical Requirements
| Element | Composition, % |
| Carbon | 0.35 max |
| Manganese | 0.60–1.05 |
| Phosphorus | 0.035 max |
| Sulfur | 0.040 max |
| Silicon | 0.10–0.35 |
| Copper | 0.40 max |
| Nickel | 0.40 max |
| Chromium | 0.30 max |
| Molybdenum | 0.12 max |
| Vanadium | 0.05 max |
| Columbium | 0.02 max |
Mechanical Properties
| Tensile strength, min, psi [MPa] | 70 000 [485] |
| Yield strength, min, psi [MPa] | 36 000 [250] |
| Elongation in 2 in. or 50 mm, min, | 30 |
%: Basic minimum elongation for walls 5?16 in. [7.9mm] and over in thickness, strip tests. | |
| When standard round 2-in. or 50-mm gage length or smaller proportionally sized specimen with the gage length equal to 4D is used | 22 |
| For strip tests, a deduction for each 1?32 -in. [0.8-mm] decrease in wall thickness below 5?16 in. [7.9 mm] from the basic minimum elongation of the percentage points | 1.5 |
| Reduction of area, min, % | 30 |
| Hardness, HB, max | 187 |
ASTM A182:American Society for Testing and Materials Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperture Service
Chemical Requirements
| Identification | UNS | Grade | Composition % | ||||||||||
| Symbol | Designation | C | Mn | P | S | Si | Ni | Cr | Mo | Nb | Ta | Ti | |
| max | max | max | |||||||||||
| F5 | K41545 | 4~6%Cr | 0.15 max | 0.30–0.60 | 0.03 | 0.03 | 0.50 max | 0.50 max | 4.0–6.0 | 0.44–0.65 | – | – | – |
| F9 | K90941 | 9%Cr | 0.15 max | 0.30–0.60 | 0.03 | 0.03 | 0.50–1.00 | – | 8.0–10.0 | 0.90–1.10 | – | – | – |
| F91 | K90941 | 9%Cr, | 0.08–0.12 | 0.30–0.60 | 0.02 | 0.01 | 0.20–0.50 | 0.40 max | 8.0–9.5 | 0.85–1.05 | Other Elements | – | |
| 1%Mo, | Cb 0.06–0.10 | ||||||||||||
| 0.2%V+Nb&N | N 0.03–0.07 | ||||||||||||
| Al 0.04 max | |||||||||||||
| V 0.18–0.25 | |||||||||||||
| F11 | K11597 | 1.25%Cr | 0.05–0.15 | 0.30–0.60 | 0.03 | 0.03 | 0.50–1.00 | – | 1.00–1.50 | 0.44–0.65 | – | – | – |
| 0.5%Mo | |||||||||||||
| F12 | K11562 | 1%Cr, | 0.05–0.15 | 0.30–0.60 | 0.045 | 0.045 | 0.50 max | – | 0.80–1.25 | 0.44–0.65 | – | – | – |
| 0.5%Mo | |||||||||||||
| F22 | K21590 | Cr-Mo | 0.05–0.15 | 0.30–0.60 | 0.04 | 0.04 | 0.50 max | – | 2.00–2.50 | 0.87–1.13 | – | – | – |
Mechanical Properties
| Identification Symbol | Tensile Strength, | Yield Strength, min, | Elongation in 2 in. |
| min, ksi [MPa] | ksi [MPa] | [50 mm] or 4D, | |
| min, % | |||
| F5 | 70 [485] | 40 [275] | 20 |
| F9 | 85 [585] | 55 [380] | 20 |
| F91 | 85 [585] | 60 [415] | 20 |
| F11 | 60 [415] | 30 [205] | 20 |
| F12 | 60 [415] | 32 [220] | 20 |
| F22 | 60 [415] | 30 [205] | 20 |
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