Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.15 | ||
| Si | - | 1.00 | ||
| Mn | 7.50 | 10.0 | ||
| P | - | 0.06 | ||
| S | - | 0.03 | ||
| Cr | 17.0 | 19.0 | ||
| Ni | 4.00 | 6.00 | ||
| N | - | 0.25 |
ASTM 202
| 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) |
|---|---|---|---|---|---|---|
| 425 (≥) | 382 (≥) | 13 | 44 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 121 |
| 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 |
|---|---|---|---|---|---|---|---|
| 398 (≥) | 641 (≥) | 41 | 21 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 213 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 533 | 556 | 868 |
We can customize the production of ASTM 202 grade, contact us for the best solution.
–sales@specificsteel.com