1.4988 (X8CrNiMoVNb16-13)
Classification
| Country |
Section |
Category |
| Germany |
Stainless and Heat Resisting Steels |
Materials with Elevated Temperature Properties |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Cr, % |
Ni, % |
V, % |
P, % |
C, % |
S, % |
Nb, % |
Mo, % |
N, % |
|---|
|
62.06–69.9 |
0.3–0.6 |
< 1.5 |
15.5–17.5 |
12.5–14.5 |
0.6–0.85 |
< 0.035 |
0.04–0.1 |
< 0.015 |
< 1.2 |
1.1–1.5 |
0.06–0.14 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
$$c\cdot 10^{-3}$$, $$\frac{J}{kg\cdot K}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 20 |
|
15 |
7960 |
0.45 |
0.79 |
| 100 |
16.3 |
16 |
|
|
|
| 200 |
16.9 |
17 |
|
|
|
| 300 |
17.3 |
18 |
|
|
|
| 400 |
17.8 |
19 |
|
|
|
| 500 |
17.8 |
20 |
|
|
|
| 600 |
18.5 |
22 |
|
|
|
| 700 |
18.7 |
23 |
|
|
|
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{0.2}$$, $$MPa$$ |
$$\epsilon_L$$, % |
$$\epsilon_T$$, % |
$$KV_{L}$$, $$J$$ |
$$KV_{T}$$, $$J$$ |
Treatment |
|---|
|
|
|
|
solution annealing |
540–740 |
255 |
30 |
20 |
60 |
40 |
|
|
|
|
|
aging |
540–740 |
255 |
30 |
|
|
|
|
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ni |
% |
Nickel |
| V |
% |
Vanadium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Nb |
% |
Niobium |
| Mo |
% |
Molybdenum |
| N |
% |
Nitrogen |
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) |
| $$R\cdot 10^{-6}$$ |
$$\Omega\cdot m$$ |
Electrical resistivity |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma_{0.2}$$ |
$$MPa$$ |
Tensile stress required to produce a total elongation of 0.2% |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\epsilon_L$$ |
% |
Elongation at break (longitudinal) |
| $$\epsilon_T$$ |
% |
Elongation at break (transverse) |
| $$KV_{L}$$ |
$$J$$ |
Impact energy (longitudinal) |
| $$KV_{T}$$ |
$$J$$ |
Impact energy (transverse) |