Resistance heating alloys
Resistance heating alloys are metallic alloys designed to generate heat when an electric current passes through them. They combine electrical resistance with stability during prolonged heating, making them suitable for heating elements in furnaces, ovens and industrial equipment.
| Grade | Material no. | C | Si | S | Cr | Mn | P |
|---|---|---|---|---|---|---|---|
| CrAl 14 4 | 1.4725 | ≤0,10 | ≤0,50 | 0,03 | 13,0-15,0 | ≤1,00 | 0,045 |
| CrAl 25 5 | 1.4765 | ≤0,10 | ≤1,00 | 0,03 | 22,0-25,0 | ≤0,60 | 0,045 |
| CrAl 20 5 | 1.4767 | ≤0,10 | ≤1,00 | 0,03 | 19,0-22,0 | ≤1,00 | 0,045 |
| CrNi 25 20 | 1.4843 | ≤0,20 | 1,50-2,50 | 0,03 | 22,0-25,0 | ≤2,00 | 0,045 |
| NiCr 30 20 | 1.4860 | ≤0,20 | 2,00-3,00 | 0,03 | 20,0-22,0 | ≤1,50 | 0,045 |
| NiCr 70 30 | 2.4658 | ≤0,10 | 0,50-2,00 | 0,015 | 29,0-32,0 | ≤1,00 | 0,02 |
| SG-NiCr19NbMoTi | 2.4667 | ≤0,08 | ≤0,40 | 0,015 | 17,0-21,0 | ≤0,40 | — |
| NiCr 80 20 | 2.4869 | ≤0,15 | 0,50-2,00 | 0,015 | 19,0-21,0 | ≤1,00 | 0,02 |
| NiCr19Fe19Nb5Mo3 | Ni 7718 | ≤0,08 | ≤0,30 | 0,015 | 17,0-21,0 | ≤0,30 | 0,015 |
Standards covering this category
13Property ranges
8| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| Rm | N/mm² | 590 | 590 | 1 |
| Re | N/mm² | 205 | 205 | 1 |
| A | % | 40 | 40 | 1 |
| Z | % | 50 | 50 | 1 |
| HB | — | 201 | 201 | 1 |
| HRB | — | 95 | 95 | 1 |
| HV | — | 210 | 210 | 1 |
| rho | g/cm³ | 7.85 | 7.85 | 9 |
Derived from 9 grades in this category with a recorded value.
Composition range
15| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| B | % | 0.006 | 0.006 | 2 |
| C | % | 0.08 | 0.2 | 9 |
| Al | % | 0.2 | 6 | 7 |
| Si | % | 0.3 | 3 | 9 |
| P | % | 0.015 | 0.045 | 8 |
| S | % | 0.015 | 0.03 | 9 |
| Ti | % | 0.6 | 1.2 | 2 |
| Cr | % | 13 | 32 | 9 |
| Mn | % | 0.3 | 2 | 9 |
| Fe | % | 1 | 24 | 4 |
| Co | % | 1.5 | 1.5 | 2 |
| Ni | % | 19 | 75 | 6 |
| Cu | % | 0.3 | 0.5 | 4 |
| Nb | % | 4.8 | 5.5 | 2 |
| Mo | % | 2.8 | 3.3 | 2 |
Derived from 9 grades in this category with a recorded value.