Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.02 | ||
| Mn | 2.00 | 4.00 | ||
| Si | - | 0.50 | ||
| P | - | 0.03 | ||
| S | - | 0.005 | ||
| Cr | 24.00 | 25.00 | ||
| Ni | 7.00 | 8.00 | ||
| Cu | 0.30 | 0.60 | ||
| N | 0.45 | 0.55 |
Specification for 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) |
|---|---|---|---|---|---|---|
| 642 (≥) | 929 (≥) | 33 | 12 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 434 |
| 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 |
|---|---|---|---|---|---|---|---|
| 365 (≥) | 183 (≥) | 13 | 41 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 444 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 952 | 916 | 177 |
We can customize the production of SA-249 S32654 grade, contact us for the best solution.
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