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ISO X7CrNiAl17-7 Details
ISO X7CrNiAl17-7 Standard Download
| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | X7CrNiAl17-7 | Precipitation-Hardening | International - ISO , ISO 15510 (2010) - Stainless steels -- Chemical composition ISO 16143-1 (2004) - Stainless steels for general purposes -- Part 1: Flat products ISO 16143-2 (2004) - Stainless steels for general purposes -- Part 2: Semi-finished products, bars, rods and sections ISO 16143-3 (2005) - Stainless steels for general purposes -- Part 3: Wire ISO 6931-1 - Stainless steels for springs - Part 1: Wire ISO 6931-2 - Stainless steels for springs - Part 2: Narrow strip ISO/TS 15510 (2003) - Stainless steels - Chemical composition |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.09 | ||
| Si | - | 0.07 | ||
| Mn | - | 1.00 | ||
| P | - | 0.040 | ||
| S | - | 0.015 | ||
| Cr | 16.00 | 18.00 | ||
| Ni | 6.50 | 7.80 | ||
| Mo | - | - | ||
| N | - | - | ||
| Al | 0.70 | 1.50 |
| 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) |
|---|---|---|---|---|---|---|
| 712 (≥) | 956 (≥) | 24 | 21 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 434 |
| 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 |
|---|---|---|---|---|---|---|---|
| 621 (≥) | 668 (≥) | 41 | 33 | 32 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 444 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 258 | 567 | 742 |
| 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 |
|---|---|---|---|
| X7CrNiAl17-7 | B.S. | UK | Steel wire for mechanical springs - Part 3: Stainless spring steel wire |
| 1.4568 | B.S. | UK | Steel wire for mechanical springs - Part 3: Stainless spring steel wire |
| X7CrNiAl17-7 | AFNOR | France | Steel wire for mechanical springs - Part 3: Stainless spring steel wire |
| 1.4568 | AFNOR | France | Steel wire for mechanical springs - Part 3: Stainless spring steel wire |
| X7CrNiAl17-7 | ISO | International | Stainless steels - Chemical composition |