ASTM A312 TP347
Chemical Requirements: Composition, %, max
| Grade | TP347(S34700) |
| Carbon | 0.08 |
| Manganese | 2.00 |
| Phosphorus | 0.045 |
| Sulfur | 0.030 |
| Silicon | 1.00 |
| Chromium | 17.0-19.0 |
| Nickel | 9.0-13.0 |
| Columbium | 10*Carbon-1.00 |
Heat Treating Temperature: 1900 °F [1040 °C]
Tensile Requirements:
| Tensile Strength, min ksi [MPa] | 75 [515] |
| Yield Strength, min ksi [MPa] | 30 [205] |
Elongation in 2 in. or 50 mm (or 4D), min, %:
| Longitudinal | 35 |
| Transverse | 25 |