EP630U (42XHM)
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Heat resistant steels and alloys |
Heat resistant high alloy steel |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
Cp, Дж/кг·К |
|---|
| 20 |
12–12.5 |
12.5–14 |
8000 |
500 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
δ, % |
Treatment |
|---|
| Round |
GOST 5632-14 |
40 |
Transverse |
raw, hot rolling, fat, Transverse |
540–740 |
245–440 |
> 30 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Round |
GOST 5632-14 |
raw, hot rolling, fat |
230–270 |
Technological Properties
| Weldability |
Flake Susceptibility |
Propensity to temper brittleness |
|---|
| Boundedly welded |
insensitive |
loathsome |
Limit operating modes
Heat Treatment Modes
| Treatment |
|---|
| Bars with special surface finish according to TU 14-131-987-2002 are delivered in a heat-treated state. Pipes according to TU 8009.00.001 TU are delivered after heat treatment in vacuum or in an oxidizing free environment. |
Properties
| Property |
|---|
| The grain size of austenite alloy according to TU 14-131-987-2002 in the delivery state is 7-11 number, according to TU 8009.00.001 and TU 8009.00.002 TU - 6-11 number; according to 8009.00.022 TU - 4-8 number according to GOST 5639. |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| Cp |
Дж/кг·К |
Specific heat of material |
| $$\alpha\cdot 10^{6}$$ |
$$K^{-1}$$ |
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 |
| δ |
% |
Elongation after rupture |
| $$\sigma_{Y}$$ |
$$MPa$$ |
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 |
|
|