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ASTM HP 9-4-20 Details
ASTM HP 9-4-20 Standard Download
| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | HP 9-4-20 | Precipitation-Hardening | USA - ASTM , SAE AMS 6525D (2012) - Steel, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.17 | 0.23 | ||
| Si | - | 0.10 | ||
| Mn | - | 0.20 | ||
| Ni | - | 0.65 | ||
| Cr | - | 0.40 | ||
| Al | 4.25 | 4.75 | ||
| Cu | - | - | ||
| Ti | - | - | ||
| Fe | - | - | ||
| Mo | - | 0.85 | ||
| Co | 8.50 | 9.50 | ||
| V | 0.06 | 0.12 | ||
| P | - | 0.01 | ||
| S | - | 0.01 | ||
| W | 0.90 | 1.10 |
| 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) |
|---|---|---|---|---|---|---|
| 153 (≥) | 652 (≥) | 31 | 34 | 24 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 223 |
| 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 |
|---|---|---|---|---|---|---|---|
| 728 (≥) | 886 (≥) | 43 | 21 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 343 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 763 | 888 | 167 |
| 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 |
|---|---|---|---|
| A 646 Grade HP 9-4-20 | SAE | USA | Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings |
| HP 9-4-20 | ASTM | USA | Steel, Sheet, Strip, and Plate 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Vacuum Consumable Electrode Melted, Annealed |
| HP 9-4-20 | ASTM | USA | Steel, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted |
| HP 9-4-20 | UNS | USA | Steel, Sheet, Strip, and Plate 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Vacuum Consumable Electrode Melted, Annealed |
| HP 9-4-20 | AMS | USA | Steel, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted |
| HP 9-4-25 | ASTM | USA | Steel Sheet, Strip, and Plate 0,48Cr - 8,0Ni - 4,0Co - 4,48Mo - 0,09V - (0,24 - 0,30C) Consumable Electrode Melted, Annealed |
| HP 9-4-25 | UNS | USA | Steel Sheet, Strip, and Plate 0,48Cr - 8,0Ni - 4,0Co - 4,48Mo - 0,09V - (0,24 - 0,30C) Consumable Electrode Melted, Annealed |
| A 646 Grade HP 9-4-30 | SAE | USA | Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings |
| HP 9-4-30 | ASTM | USA | Steel, Sheet, Strip, and Plate 1.0Cr - 7.5Ni - 4.5Co - 1.0Mo - 0.09V (0.29 - 0.34C) Consumable Electrode Vacuum Melted, Annealed |
| HP 9-4-30 | ASTM | USA | Steel, Bars, Forgings, Tubing, and Rings 1.0Cr - 7.5Ni - 4.5Co - 1.0Mo - 0.09V (0.29 - 0.34C) Consumable Electrode Vacuum Remelted, Annealed |
| HP 9-4-30 | UNS | USA | Steel, Sheet, Strip, and Plate 1.0Cr - 7.5Ni - 4.5Co - 1.0Mo - 0.09V (0.29 - 0.34C) Consumable Electrode Vacuum Melted, Annealed |
| HP 9-4-30 | UNS | USA | Steel, Bars, Forgings, Tubing, and Rings 1.0Cr - 7.5Ni - 4.5Co - 1.0Mo - 0.09V (0.29 - 0.34C) Consumable Electrode Vacuum Remelted, Annealed |