Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.04 | 0.08 | ||
| Mn | - | 1.00 | ||
| Si | - | 0.30 | ||
| P | - | 0.02 | ||
| S | - | 0.015 | ||
| Cr | 26.0 | 28.0 | ||
| Ni | 31.0 | 33.0 | ||
| Ce | 0.05 | 0.10 | ||
| Nb | 0.10 | 1.00 | ||
| Al | - | 0.025 |
Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 237 (≥) | 453 (≥) | 22 | 43 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 241 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 587 (≥) | 328 (≥) | 43 | 24 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 334 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 366 | 725 | 738 |
We can customize the production of A 249 S33228 grade, contact us for the best solution.
–sales@specificsteel.com