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B.S. NA21 Details
B.S. NA21 Standard Download
| Category | Type | Grade | Designations |
|---|---|---|---|
| Grades | Stainless Steels | NA21 | UK - B.S. , BS 3072 - Specification for nickel and nickel alloys: sheet and plate BS 3074 - Specification for nickel and nickel alloys: seamless tube BS 3076 - Specification for nickel and nickel alloys: bar |
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.10 | ||
| Si | - | 0.50 | ||
| Mn | - | 0.50 | ||
| P | - | 0.015 | ||
| S | - | 0.015 | ||
| Cr | 20.00 | 23.00 | ||
| Ni | 58.00 | - | ||
| Mo | 8.00 | 10.00 | ||
| Al | - | 0.40 | ||
| Cu | - | - | ||
| Ti | - | 0.40 | ||
| Fe | - | 5.00 | ||
| Co | - | 1.00 | ||
| Nb+Ta | 3.15 | 4.15 |
| 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) |
|---|---|---|---|---|---|---|
| 674 (≥) | 772 (≥) | 24 | 41 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 141 |
| 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 |
|---|---|---|---|---|---|---|---|
| 265 (≥) | 769 (≥) | 34 | 43 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 322 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 351 | 541 | 431 |
| 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 |
|---|---|---|---|
| NA21 | B.S. | UK | Specification for nickel and nickel alloys: bar |