1.4740 (GX40CrSi17)
Classification
| Country |
Section |
Category |
| Germany |
Stainless and Heat Resisting Steels |
Heat Resistant Steels with Ni < 2.5% |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ni, % |
P, % |
C, % |
S, % |
Mo, % |
|---|
| EN 10295 |
75.43–82.7 |
1–2.5 |
< 1 |
16–19 |
< 1 |
< 0.04 |
0.3–0.5 |
< 0.03 |
< 0.5 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
$$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ |
|---|
| 20 |
|
18.8 |
7700 |
0.5 |
| 400 |
12.5 |
|
|
|
| 800 |
13.5 |
|
|
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
|
|
annealing, soft |
300 |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ni |
% |
Nickel |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Mo |
% |
Molybdenum |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$\alpha\cdot 10^{6}$$ |
$$K^{-1}$$ |
Coefficient of thermal (linear) expansion (range 20°C–T) |
| $$\varkappa$$ |
$$\frac{W}{m\cdot K}$$ |
Coefficient of thermal conductivity (the heat capacity of the material) |
| $$\rho$$ |
$$\frac{kg}{m^3}$$ |
The density of the material |
| $$c\cdot 10^{-3}$$ |
$$\frac{J}{kg\cdot K}$$ |
The specific heat of the material (range 20°C–T) |