DIN 59470 Grade CrAl14-4: Soft‑Annealed Al‑Cr Ferritic Material for High‑Temperature Applications
CrAl 44 is an ferritic aluminium-chromium material (heating conductor material) used at extrem alternating temperature loading from 1250 to 1350 °C. Application: thin sheet as carrier material for vehicle exhaust-gas catalysts, industry furnace parts
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 7.3 g/cm³ |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 220 GPa | Typical for Ferritic Stainless Steel |
Elongation | 20.0 °C | 8 % | |
Elongation A100 | 20.0 °C | 8 - 18 % | |
Poisson's ratio | 23.0 °C | 0.3 [-] | Typical for Ferritic Stainless Steel |
Shear modulus | 23.0 °C | 77 GPa | Typical for Ferritic Stainless Steel |
Tensile strength | 20.0 °C | 600 MPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
Coefficient of thermal expansion | 200.0 °C | 1.1E-5 1/K | |
400.0 °C | 1.2E-5 1/K | ||
600.0 °C | 1.3E-5 1/K | ||
800.0 °C | 1.4E-5 1/K | ||
1000.0 °C | 1.5E-5 1/K | ||
Max service temperature, long | 1250 - 1350 °C | ||
Melting point | 1425 - 1530 °C | Typical for Ferritic Stainless Steel | |
Specific heat capacity | 20.0 °C | 480 J/(kg·K) | |
1000.0 °C | 650 J/(kg·K) | ||
Thermal conductivity | 20.0 °C | 15 W/(m·K) | |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical resistivity | 20.0 °C | 1.25E-6 Ω·m |
100.0 °C | 1.26E-6 Ω·m | |
200.0 °C | 1.27E-6 Ω·m | |
300.0 °C | 1.28E-6 Ω·m | |
400.0 °C | 1.3E-6 Ω·m | |
500.0 °C | 1.32E-6 Ω·m | |
600.0 °C | 1.34E-6 Ω·m | |
700.0 °C | 1.36E-6 Ω·m | |
800.0 °C | 1.39E-6 Ω·m | |
900.0 °C | 1.41E-6 Ω·m | |
1000.0 °C | 1.42E-6 Ω·m | |
1100.0 °C | 1.44E-6 Ω·m | |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 3.5 - 5 % |
Carbon | 0.1 % |
Chromium | 13 - 15 % |
Manganese | 1 % |
Phosphorus | 0.05 % |
Silicon | 0.5 % |
Sulfur | 0.03 % |
Metal
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