347/347H
Composition of Pipe and Tubing
| Grade | 347 | 347H |
|---|
| UNS Designation | S34700 | S34709 |
|---|
| Carbon (C) Max. |
0.08 |
0.04–0.10 |
| Manganese (Mn) Max. |
2.00 |
2.00 |
| Phosphorous (P) Max. |
0.04 |
0.04 |
| Sulphur (S) Max. |
0.03 |
0.03 |
| Silicon (Si) Max. |
0.75 |
0.75 |
| Chromium (Cr) |
17.0–20.0 |
17.0–20.0 |
| Nickel (Ni) |
9.0–13.0 |
9.0–13.0 |
| Molybdenum (Mo) |
— |
— |
| Nitrogen (N) |
— |
— |
| Iron (Fe) |
Bal. |
Bal. |
| Other Elements |
Cb+Ta=10xC-1.0 |
Cb+Ta=8xC-1.0 |
347/347H
Physical Properties in the Annealed Condition at -20°F to +100°F
| | | | Tensile Strength | Yield Strength | | | | | | |
|---|
| Alloy | UNS Designation | Spec. | psi | MPa | ksi | psi | MPa | ksi | Elongation in 2 inches (min.) % | Grain Size Req. | Maximum Harndess | 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 |
— |
75,000 |
515 |
— |
30,000 |
205 |
— |
35 |
— |
— |
29.0 |
9.2 |
— |
| 347H |
S34709 |
— |
75,000 |
515 |
— |
30,000 |
205 |
— |
35 |
7 or coarser |
— |
29.0 |
9.2 |
— |
347/347H
Product Range
| Alloy | UNS Designation | Werkstoff NR. | Specifications* |
|---|
| 347 |
S34700 |
1.4550 |
A269, A/SA249, A/SA312 |
| 347H |
S34709 |
— |
A/SA249, A/SA312 |
*Note: The specifications noted including ASTM, ASME, or other applicable authorities are correct at the time of publication. Other specifications may apply for use of these materials in different applications.