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) | 
|---|---|---|---|---|---|---|
| 582 (≥) | 478 (≥) | 14 | 44 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 122 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 14 | - | - | 0.31 | - | |||
| 857 | 279 | - | 14.3 | 342 | - | ||
| 998 | - | 42 | 33.2 | 233 | 112 | 
Heat treated : 1251°C - 1282°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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