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| Category | Type | Steel grade | Standard | Country |
|---|---|---|---|---|
| Grades | Special Alloy | M7 | ASTM | USA |
Chemical composition % of the ladle analysis of grade M7
| C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Mo(％) | V(%) | W(%) |
|---|---|---|---|---|---|---|---|---|
| 0.97～1.05 | 0.20～0.55 | 0.15～0.40 | ≤0.030 | ≤0.030 | 3.50～4.00 | 8.20～9.20 | 1.75～2.25 | 1.40～2.10 |
| 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) |
|---|---|---|---|---|---|---|
| 847 (≥) | 916 (≥) | 43 | 12 | 43 | 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 |
|---|---|---|---|---|---|---|---|
| 735 (≥) | 178 (≥) | 43 | 42 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 133 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 775 | 749 | 283 |
| 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 |
| Grade | Standard | Country | Application |
|---|---|---|---|
| SUS XM7 | ASTM | USA | Stainless steel bars |
| SUS XM7 | ASTM | USA | Hot-rolled stainless steel plates, sheet and strip |
| SUS XM7 | ASTM | USA | Cold-rolled stainless steel plate, sheet and strip |
| SUS XM7 | ASTM | USA | Stainless steel wire rods |
| SUS XM7 | ASTM | USA | Stainless steel wires |
| SUS XM7-WSA | ASTM | USA | Stainless steel wires for cold heading and cold forging |
| SUS XM7-WSB | ASTM | USA | Stainless steel wires for cold heading and cold forging |
| STSXM7 | ASTM | USA | Stainless steel bars |
| STSXM7WSA | ASTM | USA | Stainless steel wires for cold heading and cold forging |
| STSXM7WSB | ASTM | USA | Stainless steel wires for cold heading and cold forging |
| XM7 | ASTM | USA | Stainless steel wire rods |
| M7 | ASTM | USA | High-Speed Tool Steel |