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UNS NV7(4140) Details
Steel for intake valves
UNS NV7(4140) Standard Download
NV7(4140) Datasheet
UNS NV7(4140)| Category | Type | Grade | Designations |
|---|---|---|---|
| Grades | Stainless Steels | NV7(4140) | USA - UNS , |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.37 | 0.44 | ||
| Si | 0.15 | 0.35 | ||
| Mn | 0.65 | 1.10 | ||
| P | - | 0.035 | ||
| S | - | 0.04 | ||
| Cr | 0.75 | 1.20 | ||
| Mo | 0.15 | 0.25 |
| 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) |
|---|---|---|---|---|---|---|
| 272 (≥) | 381 (≥) | 32 | 42 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 424 |
| 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 |
|---|---|---|---|---|---|---|---|
| 938 (≥) | 752 (≥) | 43 | 34 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 224 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 954 | 454 | 229 |
| 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 |
|---|---|---|---|
| NV7(4140) | UNS | USA | Steel for intake valves |
| H41400 | AISI | USA | Steel for intake valves |
| HNV7(71360) | UNS | USA | Steel for intake valves |
| A 276 S41400 | SAE | USA | Stainless Steel Bars and Shapes |
| A 314 S41400 | SAE | USA | Stainless Steel Billets and Bars for Forging |
| A 473 S41400 | SAE | USA | Stainless Steel Forgings |
| A 580 S41400 | SAE | USA | Stainless Steel Wire |
| S41400 | AISI | USA | Martensitic Chromium Stainless Steel |