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UNS Pyromet 31 Details
UNS Pyromet 31 Standard Download
Pyromet 31 Application:Engine poppet valve information report
| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | Pyromet 31 | Precipitation-Hardening | USA - UNS , SAE J 775 (2004) - Engine poppet valve information report |
Chemical composition(wt.%) of Pyromet 31 grade: SAE J 775 (2004)
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.03 | 0.06 | ||
| Si | - | 0.20 | ||
| Mn | - | 0.20 | ||
| Cr | 22.00 | 23.00 | ||
| Ni | 55.00 | 58.00 | ||
| Mo | 1.70 | 2.30 | ||
| Co | - | - | ||
| W | - | - | ||
| Al | 1.00 | 1.70 | ||
| Cu | 0.60 | 1.20 | ||
| Ti | 2.10 | 2.60 | ||
| Fe | - | remaining | ||
| B | 0.003 | 0.007 | ||
| P | - | 0.015 | ||
| S | - | 0.015 |
Mechanical properties of grade Pyromet 31 SAE J 775 (2004)
| 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) |
|---|---|---|---|---|---|---|
| 487 (≥) | 179 (≥) | 22 | 42 | 32 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 214 |
Physical properties of grade Pyromet 31 SAE J 775 (2004)
| 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 |
|---|---|---|---|---|---|---|---|
| 327 (≥) | 176 (≥) | 41 | 43 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 331 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 342 | 892 | 469 |
Pyromet 31 - Form of Supply
| 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 |
Cross Reference Table(Equivalent Grade)
| Grade | Standard | Country | Application |
|---|---|---|---|
| Pyromet 31 | UNS | USA | Engine poppet valve information report |
| Pyromet 31V | UNS | USA | Engine poppet valve information report |
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