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ASTM M7 Details
High-Speed Tool Steel
ASTM M7 Standard Download
M7 Datasheet
ASTM M7| Category | Type | Grade | Designations |
|---|---|---|---|
| Grades | Tool Die Steels | M7 | USA - ASTM , |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.97 | 1.05 | ||
| Si | 0.20 | 0.55 | ||
| Mn | 0.15 | 0.40 | ||
| P | - | 0.030 | ||
| S | - | 0.030 | ||
| Cr | 3.50 | 4.00 | ||
| Mo | 8.20 | 9.20 | ||
| V | 1.75 | 2.25 | ||
| W | 1.40 | 2.10 | ||
| Co | - | - |
| 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) |
|---|---|---|---|---|---|---|
| 218 (≥) | 665 (≥) | 31 | 34 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 331 |
| 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 |
|---|---|---|---|---|---|---|---|
| 956 (≥) | 886 (≥) | 32 | 43 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 432 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 128 | 752 | 723 |
| 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 | JIS | Japan | Stainless steel bars |
| SUS XM7 | JIS | Japan | Hot-rolled stainless steel plates, sheet and strip |
| SUS XM7 | JIS | Japan | Cold-rolled stainless steel plate, sheet and strip |
| SUS XM7 | JIS | Japan | Stainless steel wire rods |
| SUS XM7 | JIS | Japan | Stainless steel wires |
| SUS XM7-WSA | JIS | Japan | Stainless steel wires for cold heading and cold forging |
| SUS XM7-WSB | JIS | Japan | Stainless steel wires for cold heading and cold forging |
| STSXM7 | KS | Korea | Stainless steel bars |
| STSXM7WSA | KS | Korea | Stainless steel wires for cold heading and cold forging |
| STSXM7WSB | KS | Korea | Stainless steel wires for cold heading and cold forging |
| XM7 | CNS | China | Stainless steel wire rods |
| M7 | ASTM | USA | High-Speed Tool Steel |