USA SAE B 344 (2011), B 344 Ni80-Cr20 Specialsteel Drawn or Rolled Nickel-Chromium and Nickel-Chromium-Iron Alloys for Electrical Heating Elements and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Type | Standard | Country | Application |
|---|---|---|---|---|---|---|
| Steel Grades | Specialsteel | B 344 Ni80-Cr20 | Precipitation-Hardening | SAE | USA | Drawn or Rolled Nickel-Chromium and Nickel-Chromium-Iron Alloys for Electrical Heating Elements |
| C | Si | Mn | Cr | Ni | Mo | Co | W | Al | Cu | Ti | Fe | Nb |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.12 | ≤0.30 | ≤0.80 | ≤19.00 | ≤14.00 | ≤ ≥ | ≤ ≥ | ≤ ≥ | ≤ ≥ | ≤ ≥ | ≤ ≥ | ≤remaining | ≤1.60 |
| Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 819 (≥) | 546 (≥) | 23 | 14 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 132 |
| Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson’s coefficient, ν |
|---|---|---|---|---|---|---|---|
| 32 | - | - | 0.32 | - | |||
| 722 | 655 | - | 23.3 | 442 | - | ||
| 317 | - | 14 | 43.2 | 424 | 223 |
Heat treated : 1461°C - 1832°C
| Grade | Standard | Country | Application |
|---|---|---|---|
| R-20 | |||
| 25Cr-20Ni | |||
| 25Cr-20Ni+ | |||
| 29Cr-20Ni | |||
| 25Cr-20Ni | |||
| 25Cr-20Ni | |||
| 25Cr-20Ni | |||
| 25Cr-20Ni | |||
| 25Cr-20Ni | |||
| 29Cr-20Ni | |||
| 29Cr-20Ni | |||
| 29Cr-20Ni |
| B 344 (2011) | Drawn or Rolled Nickel-Chromium and Nickel-Chromium-Iron Alloys for Electrical Heating Elements | B-344-(2011).pdf |
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