Iron-Chromium-Aluminum Alloy Wires
1Cr13Al4 heating resistance wires
- Features:
- Compared to high-aluminum grades (such as 0Cr25Al5 with ~5-6% Al), 1Cr13Al4(DIN W.Nr. 1.4725) has lower aluminum content (approx. 3.7-4.5%) and moderate chromium content (12-14%) . This significantly reduces room temperature brittleness, improving elongation (typically >20%) and impact toughness. It can undergo certain degrees of cold bending, stamping, and welding, making it suitable for manufacturing complex-shaped heating structural parts, not just simple helical coils. Most Fe-Cr-Al alloys (especially high-aluminum types) are extremely difficult to weld due to high-temperature grain coarsening and low-temperature brittleness. 1Cr13Al4, with aluminum content controlled below the critical threshold and containing small amounts of carbon, has far superior weldability compared to 0Cr25Al5. It can be joined using TIG welding, making it suitable for manufacturing large welded assemblies (e.g., furnace linings, welded heating frames), which is difficult to achieve with other high-aluminum heating alloys. Although its maximum operating temperature (approx. 900-1000℃) is lower than 0Cr25Al5 (1300℃+), within this range, the Al₂O₃ protective film formed by 1Cr13Al4 provides excellent oxidation and carburization resistance.
- 1Cr13Al4 Resistance Wire is also known as Resistohm 125, CrAl 14/4(DIN W.Nr. 1.4725), Alkrothal 14, 15Ю5, Alloy 750, Ohmalloy 40, Alferon 902, Alchrome 750, Aluchrom W, 750 Alloy, Stablohm 750 etc.
- Specifications:
- Bright and soft annealed finish: 0.05 - 1.6mm; Acid-pickled or oxidation finish: 1.0 -12.0mm; Rods: 6.0-150.0mm
Flat wire: width from 0.2 - 6.0mm and thickness from 0.08 - 1.0mm; Wide strip: width from 5.0 - 300mm and thickness from 0.05 - 4.0mm
Product Description
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Chemical Composition:| C | P | S | Mn | Si | Cr | Ni | Al | Fe |
|---|---|---|---|---|---|---|---|---|
| ≤ | ||||||||
| 0.12 | 0.025 | 0.02 | 0.5 | ≤0.7 | 12.0~15.0 | ≤0.6 | 4.0~6.0 | Remainder |
| Max. continuous service Temp. | 950ºC | Resistivity at 20ºC( μΩ·m) | 1.25±0.08 |
| Density | 7.4 g/cm3 | Thermal conductivity(20ºC) | 15 W/(m·K) |
| Average linear expansion coefficient(20-1000ºC) | 15.4×10-6/ºC | Specific heat capacity | 0.49 J/(g·K) |
| Approx. melting point | 1450ºC | Elongation at breakn | Diameter≤3.0mm: ≥12% Diameter>3.0mm: ≥15% |
| Tensile strength(Rm/MPa) | ≥580 | Accelerated life test | ≥80h/950ºC |
| Micrographic structure | Ferrite | Magnetic properties | Magnetic |
|
Diameter
(mm) |
Ohm per meter
(20ºC Ω/m) |
Length per kg
(m/kg) |
Weight per meter
(g/m) |
Diameter
(mm) |
Ohm per meter
(20ºC Ω/m) |
Length per kg
(m/kg) |
Weight per meter
(g/m) |
|---|---|---|---|---|---|---|---|
| 0.05 | 636.620 | 68823.82 | 0.01453 | 1.1 | 1.3153 | 142.20 | 7.03245 |
| 0.06 | 442.097 | 47794.32 | 0.02092 | 1.2 | 1.1052 | 119.49 | 8.36920 |
| 0.07 | 324.806 | 35114.19 | 0.02848 | 1.3 | 0.9417 | 101.81 | 9.82218 |
| 0.08 | 248.680 | 26884.30 | 0.03720 | 1.4 | 0.8120 | 87.79 | 11.39141 |
| 0.09 | 196.488 | 21241.92 | 0.04708 | 1.5 | 0.7074 | 76.47 | 13.07687 |
| 0.1 | 159.155 | 17205.95 | 0.05812 | 1.6 | 0.6217 | 67.21 | 14.87857 |
| 0.11 | 131.533 | 14219.80 | 0.07032 | 1.7 | 0.5507 | 59.54 | 16.79651 |
| 0.12 | 110.524 | 11948.58 | 0.08369 | 1.8 | 0.4912 | 53.10 | 18.83069 |
| 0.13 | 94.175 | 10181.04 | 0.09822 | 1.9 | 0.4409 | 47.66 | 20.98111 |
| 0.15 | 70.736 | 7647.09 | 0.13077 | 2.0 | 0.3979 | 43.01 | 23.24777 |
| 0.17 | 55.071 | 5953.62 | 0.16797 | 2.2 | 0.3288 | 35.55 | 28.12980 |
| 0.19 | 44.087 | 4766.19 | 0.20981 | 2.4 | 0.2763 | 29.87 | 33.47678 |
| 0.21 | 36.090 | 3901.58 | 0.25631 | 2.6 | 0.2354 | 25.45 | 39.28872 |
| 0.25 | 25.465 | 2752.95 | 0.36325 | 2.8 | 0.2030 | 21.95 | 45.56562 |
| 0.27 | 21.832 | 2360.21 | 0.42369 | 3.0 | 0.1768 | 19.12 | 52.30747 |
| 0.29 | 18.925 | 2045.89 | 0.48878 | 3.2 | 0.1554 | 16.80 | 59.51428 |
| 0.31 | 16.561 | 1790.42 | 0.55853 | 3.4 | 0.1377 | 14.88 | 67.18604 |
| 0.35 | 12.992 | 1404.57 | 0.71196 | 3.6 | 0.1228 | 13.28 | 75.32276 |
| 0.40 | 9.947 | 1075.37 | 0.92991 | 3.8 | 0.1102 | 11.92 | 83.92444 |
| 0.45 | 7.860 | 849.68 | 1.17692 | 4.0 | 0.0995 | 10.75 | 92.99106 |
| 0.50 | 6.366 | 688.24 | 1.45299 | 4.5 | 0.0786 | 8.50 | 117.69182 |
| 0.55 | 5.261 | 568.79 | 1.75811 | 5.0 | 0.0637 | 6.88 | 145.29854 |
| 0.60 | 4.421 | 477.94 | 2.09230 | 5.5 | 0.0526 | 5.69 | 175.81123 |
| 0.65 | 3.767 | 407.24 | 2.45555 | 6.0 | 0.0442 | 4.78 | 209.22989 |
| 0.70 | 3.248 | 351.14 | 2.84785 | 6.5 | 0.0377 | 4.07 | 245.55453 |
| 0.80 | 2.487 | 268.84 | 3.71964 | 7.0 | 0.0325 | 3.51 | 284.78513 |
| 0.85 | 2.203 | 238.14 | 4.19913 | 7.5 | 0.0283 | 3.06 | 326.92171 |
| 0.90 | 1.965 | 212.42 | 4.70767 | 8.0 | 0.0249 | 2.69 | 371.96426 |
| 0.95 | 1.763 | 190.65 | 5.24528 | 8.5 | 0.0220 | 2.38 | 419.91277 |
| 1.00 | 1.592 | 172.06 | 5.81194 | 9.0 | 0.0196 | 2.12 | 470.76726 |
The above parameters are based on Chinese National Standard GB/T1234-2012. The tolerance of resistance per meter: 0.03-0.06mm is ±10%; 0.07-0.12mm is ±8%; 0.13-0.17mm is ±7%; 0.18-0.32mm is ±6%; A wire diameter above 0.32mm is ±5%. We provide the Iron-Chromium-Aluminium alloy products in various forms, like the wires, strips and rods. Other alloys like 0Cr23Al5, 0Cr21Al6Nb, 0Cr20Al3, 0Cr20Al6RE, 0Cr25Al5 and 0Cr27Al7Mo2 are also available upon request.