Grades | Stainless Steels | HR251
B.S. HR251
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HR251 Application:Specification for heat-resisting alloy plate, sheet and strip (Ni 25.5, Cr 14.7, Ti 1.8, Mn 1.5, Mo 1.2, V 0.3, Fe remainder)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.06 | ||
| Si | - | 0.50 | ||
| Mn | - | 2.00 | ||
| P | - | 0.020 | ||
| S | - | 0.015 | ||
| Cr | 13.50 | 16.00 | ||
| Ni | 24.00 | 27.00 | ||
| Mo | 1.00 | 1.50 | ||
| Co | - | - | ||
| Ti | 1.70 | 2.00 | ||
| Fe | - | remaining | ||
| Al | - | 0.35 | ||
| V | 1.70 | 2.00 | ||
| B | 0.003 | 0.010 | ||
| Pb | - | 0.005 |
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | HBW |
|---|---|---|---|---|---|---|
| 889 (≥) | 599 (≥) | 13 | 44 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 433 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
|---|---|---|---|---|---|
| 955 (≥) | 319 (≥) | 34 | 31 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
- | - | - |
| 167 | 543 | 899 | - | - | - |
| Product type | Products | Dimension | Processes | Deliver Status |
|---|---|---|---|---|
| Plates / Sheets | Plates / Sheets | 0.08-200mm(T)*W*L | Forging, hot rolling and cold rolling | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Steel Bar | Round Bar, Flat Bar, Square Bar | Φ8-1200mm*L | Forging, hot rolling and cold rolling, Cast | Black, Rough Turning, Shot Blasting, |
| Coil / Strip | Steel Coil /Steel Strip | 0.03-16.0x1200mm | Cold-Rolled & Hot-Rolled | Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting |
| Pipes / Tubes | Seamless Pipes/Tubes, Welded Pipes/Tubes | OD:6-219mm x WT:0.5-20.0mm | Hot extrusion, Cold Drawn, Welded | Annealed, Solution and Aging, Q+T, ACID-WASHED |