EP496 (N70MF, N70M27F, 0N70M27F)
Classification
| Country | Section | Category |
|---|---|---|
| CIS, Russia, Ukraine | Heat resistant steels and alloys | Heat resistant alloys |
Chemical composition
| Standard | Fe, % | Si, % | Mn, % | Cr, % | Ni, % | V, % | P, % | C, % | S, % | Mo, % |
|---|---|---|---|---|---|---|---|---|---|---|
| < 4 | < 0.2 | < 0.5 | < 0.3 | 64.21–73.6 | 1.4–1.7 | < 0.02 | < 0.05 | < 0.02 | 25–29 |
Information on suppliers
Physical characteristics
| Temperature, °C | $$\alpha\cdot 10^{6}$$, $$K^{-1}$$ | $$\varkappa$$, $$\frac{W}{m\cdot K}$$ | $$\rho$$, $$\frac{kg}{m^3}$$ |
|---|---|---|---|
| 20 | 11.5–12 | 60–65 | 8400 |
Mechanical properties at 20 °C
| Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{Y}$$, $$MPa$$ | d5, % | Treatment |
|---|---|---|---|---|---|---|---|---|
| Sheet cold rolled. | GOST 24982-81 | 1.5 | Transverse | raw, cold rolling, thin, Transverse | 820–840 | 380–400 | 35–40 |
Brinell hardness number
| Rolling | Standard | Classifiers | Value, HBW |
|---|---|---|---|
| Sheet | GOST 5632-14 | raw, cold rolling, thin, Transverse | 240–280 |
Technological Properties
| Weldability | Flake Susceptibility | Propensity to temper brittleness |
|---|---|---|
| no limits | not sensitive | not inclined |
Heat Treatment Modes
| Treatment |
|---|
| quenching 1050-1090 |
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 |
| 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 |
Description of mechanical properties
| Parameter | Units of measurement | Description |
|---|---|---|
| d5 | % | Elongation at break |
| $$\sigma_{Y}$$ | $$MPa$$ | Yield strength |
| $$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
Designation of types of weldability
| Parameter | Units of measurement | Description |
|---|---|---|
| no limits | Welding is performed without heating and without subsequent heat treatment | |
| Boundedly welded | Welding is possible with heating up to 100–120 °C and subsequent heat treatment | |
| Difficult to weld | For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing | |
| Not applicable for welded structures |