The following figures apply to solution annealed condition seamless tube and pipe.
| Wall thickness | Proof strength | Tensile strength | Elong. | Hardness | ||
|---|---|---|---|---|---|---|
| Rp0.2a) | Rp1.0a) | Rm | Ab) | A2" | HRB | |
| mm | MPa | MPa | MPa | % | % | |
| <5 | ≥310 | ≥340 | 675-850 | ≥35 | ≥35 | ≤96 |
| >5 | ≥310 | ≥340 | 655-850 | ≥35 | ≥35 | ≤96 |
1 MPa = 1 N/mm2
| Wall thickness | Proof strength | Tensile strength | Elong. | Hardness | ||
|---|---|---|---|---|---|---|
| Rp0.2a) | Rp1.0a) | Rm | Ab) | A2" | HRB | |
| inch | ksi | ksi | ksi | % | % | |
| <0.187 | ≥45 | ≥49 | 98-123 | ≥35 | ≥35 | ≤96 |
| >0.187 | ≥45 | ≥49 | 98-123 | ≥35 | ≥35 | ≤96 |
a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength, respectively.
b) Based on L0 = 5.65 √S0 where L0 is the original gauge length and S0 the original cross-section area.
Impact strength
Due to its austenitic microstructure, Sandvik 254 SMO has very good impact strength both at room temperature and at cryogenic temperatures.
Tests have demonstrated that the steel fulfils the requirements (60 J (44 ft-lb) at -196 oC (-320 oF)) according to the European standards EN 13445-2 (UFPV-2) and EN 10216-5.
At high temperatures
Intermetallic phases are precipitated within the temperature range of 600–1000°C (1110–1830°F). Therefore, the steel should not be exposed to these temperatures for prolonged periods.
| Temperature |
Proof strength |
|
|---|---|---|
| °C | Rp0.2 | Rp1.0 |
| MPa | MPa | |
| min. | min. | |
| 100 | 230 | 270 |
| 200 | 190 | 225 |
| 300 | 170 | 200 |
400 |
160 |
190 |
| 500 | 148 | 180 |
| Temperature |
Proof strength |
|
|---|---|---|
| °F | Rp0.2 | Rp1.0 |
| ksi | ksi | |
| min. | min. | |
| 200 | 34 | 40 |
| 400 | 27 | 32 |
| 600 | 24 | 29 |
700 |
24 |
28 |
| 900 | 22 | 26 |
Figure 1. Strength values (min. values) for Sandvik 254SMO and allowable stress according to ASME Boiler and Pressure Vessel Code section VIII, div. 1.