347 VS 347H VS 347HFG
ASTM A213 347/347H / 347HFG Stainless Steel Tubes Chemical Composition
| Grade | 347 | 347H | 347HFG |
| UNS Designation | S34700 | S34709 | S34710 |
| Carbon (C) Max. | 0.08 | 0.04–0.10 | 0.06–0.10 |
| Manganese (Mn) Max. | 2.00 | 2.00 | 2.00 |
| Phosphorous (P) Max. | 0.04 | 0.04 | 0.04 |
| Sulphur (S) Max. | 0.03 | 0.03 | 0.03 |
| Silicon (Si) Max. | 0.75 | 0.75 | 0.75 |
| Chromium (Cr) | 17.0–20.0 | 17.0–20.0 | 17.0–20.0 |
| Nickel (Ni) | 9.0–13.0 | 9.0–13.0 | 9.0–13.0 |
| Molybdenum (Mo) | — | — | |
| Nitrogen (N) | — | — | — |
| Iron (Fe) | Bal. | Bal. | Bal. |
| Other Elements | Cb+Ta=10xC-1.0 | Cb+Ta=8xC-1.0 | Nb+Ta=8xC-1.0 |
347 347H 347HFG Stainless Steel Mechanical Properties
| Tensile Strength | Tensile Strength | Yield Strength | Yield Strength | |||||
| Alloy | UNS | Spec | MPa | ksi | MPa | ksi | Elongation in 2 inches (min.) % | Harndess HBW |
| 347 | S34700 | ASTM A213 | 515 | 75 | 205 | 30 | 35 | 192 |
| 347H | S34709 | ASME SA 213 | 515 | 75 | 205 | 30 | 35 | 192 |
| 347HFG | S34710 | — | 550 | 80 | 205 | 30 | 35 | 192 |
347 347H 347HFG Stainless Steel Physical Properties
| Alloy | UNS Design | Density kgs/dm³ | Modulus of Elasticity (x106 psi) | Mean Coefficient of Thermal Expansion (IN./IN./°F x 10-6) | Thermal Conductivity (BTU-in/ft2-h-°F) |
| 347 | S34700 | 7.98 | 29.0 | 9.2 | — |
| 347H | S34709 | 7.98 | 29.0 | 9.2 | — |
| 347HFG | S34710 | — | 29.0 | 9.2 | — |
347 347H 347HFG Stainless Steel Grain Size
| Alloy | UNS | Spec | Grain Size Req. ASTM E112 |
| 347 | S34700 | ASTM A213 | — |
| 347H | S34709 | ASME SA 213 | 7 or coarser |
| 347HFG | S34710 | ASME SA213 | 7 – 10 |
347H Stainless Steel Pipe Related Links
347 347H General Properties
347 347H Chemical Composition
347 347H Resistance to Corrosion
347 347H Physical Properties
347 347H Mechanical Properties
347 347H Elevated Temperature Oxidation Resistance
347 347H Heat Treatment
347 347H Fabrication