Chromium, Nickel, Aluminium steel for applications requiring very high surface hardness and wear resistance, in particular in large cross sections, in the hardened and tempered condition
Cam discs, Cams, Pinion shafts, Measuring tools. Injection pump parts, Valve spools and Gudgeon pins.
| Category | Type | Grade | Designations |
|---|---|---|---|
| Grades | Stainless Steels | V820 | Germany - DIN , DIN EN 10085 - Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels, |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.30 | 0.37 | ||
| Si | - | 0.40 | ||
| Mn | 0.40 | 0.70 | ||
| P | - | 0.025 | ||
| S | - | 0.035 | ||
| Al | 0.80 | 1.20 | ||
| Cr | 1.50 | 1.80 | ||
| Mo | 0.15 | 0.25 | ||
| Ni | 0.85 | 1.15 |
| 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) |
|---|---|---|---|---|---|---|
| 233 (≥) | 627 (≥) | 41 | 32 | 14 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 443 |
| 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 |
|---|---|---|---|---|---|---|---|
| 528 (≥) | 552 (≥) | 32 | 13 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 244 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 529 | 268 | 745 |
| 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 |
|---|---|---|---|
| 34CrAlNi7 | DIN | Germany | Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels, |
| 1.8550 | DIN | Germany | Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels, |
| V820 | DIN | Germany | Al-alloyed nitriding steel grade for large cross-sections. Suitable for piston rods, extruders, cylinders, gear wheels, |