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AISI K31820 Details
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| Category | Type | Grade | Microstructure | Designations |
|---|---|---|---|---|
| Grades | Stainless Steels | K31820 | Precipitation-Hardening | USA - AISI , |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.08 | ||
| Si | - | 1.00 | ||
| Mn | - | 2.00 | ||
| P | - | 0.045 | ||
| S | - | 0.03 | ||
| Ni | 13.00 | 15.00 | ||
| Cr | 17.00 | 19.00 | ||
| Al | - | - | ||
| Cu | - | - | ||
| Ti | - | - | ||
| Fe | - | - | ||
| N | - | - | ||
| Mo | 1.75 | 2.75 | ||
| V | - | - |
| 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) |
|---|---|---|---|---|---|---|
| 579 (≥) | 324 (≥) | 23 | 14 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 412 |
| 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 |
|---|---|---|---|---|---|---|---|
| 671 (≥) | 656 (≥) | 13 | 14 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 323 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 366 | 672 | 448 |
| 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 1049 S31803 | SAE | USA | Stainless Steel Forgings, Ferritic/Austenitic (Duplex), for Pressure Vessels and Related Components |
| A 240 S31803 | SAE | USA | Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
| A 270 S31803 | SAE | USA | Seamless and Welded Austenitic Stainless Steel Sanitary Tubing |
| A 276 S31803 | SAE | USA | Stainless Steel Bars and Shapes |
| A 479 S31803 | SAE | USA | Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels |
| A 511 S31803 | SAE | USA | Seamless Stainless Steel Mechanical Tubing |
| A 789 S31803 | SAE | USA | Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service |
| A 790 S31803 | SAE | USA | Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe |
| A 815 CRS31803 | SAE | USA | Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings |
| A 815 WPS31803 | SAE | USA | Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings |
| A 928 S31803 | SAE | USA | Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal |
| A 949 S31803 | SAE | USA | Spray-Formed Seamless Ferritic/Austenitic Stainless Steel Pipe |
| A 955 S31803 Grade 280 | SAE | USA | Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement |
| A 955 S31803 Grade 40 | SAE | USA | Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement |
| A 955 S31803 Grade 420 | SAE | USA | Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement |
| A 955 S31803 Grade 520 | SAE | USA | Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement |
| A 955 S31803 Grade 60 | SAE | USA | Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement |
| A 955 S31803 Grade 75 | SAE | USA | Deformed and Plain Stainless-Steel Bars for Concrete Reinforcement |
| A 959 S31803 | SAE | USA | Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels |
| A 988 S31803 | SAE | USA | Hot Isostatically-Pressed Stainless Steel Flanges, Fittings, Valves, and Parts for High Temperature Service |