14H2GMRL
responsible for the welded-cast structures of large sections of career and draglines.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Steels and alloys for castings |
Ordinary steel for castings |
Chemical composition
| Standard |
Fe, % |
Si, % |
B, % |
Mn, % |
Cr, % |
Cu, % |
Ni, % |
P, % |
C, % |
S, % |
Mo, % |
|---|
| GOST 21357-87 |
95.316–96.95 |
0.2–0.42 |
< 0.004 |
0.9–1.2 |
1.4–1.7 |
< 0.3 |
< 0.3 |
< 0.02 |
0.1–0.17 |
< 0.02 |
0.45–0.55 |
Information on suppliers
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
$$\psi$$, % |
$$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ |
Treatment |
|---|
| Castings |
GOST 21357-87 |
< 100 |
|
|
690 |
590 |
14 |
25 |
490 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Alloy |
|
annealing |
179–196 |
Casting and technological parameters
| linear shrinkage, % |
|---|
| 2.4–2.5 |
Technological Properties
| Weldability |
Propensity to temper brittleness |
|---|
| Difficult to weld |
loathsome |
Heat Treatment Modes
| Treatment |
|---|
| Water hardening 920 - 930 ° C, Release 630 - 650 ° C |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| B |
% |
Bor |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Cu |
% |
Copper |
| Ni |
% |
Nickel |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Mo |
% |
Molybdenum |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\sigma_{P}$$ |
$$MPa$$ |
Proportionality limit |
| $$\epsilon_L$$ |
% |
Elongation at break (longitudinal) |
| $$\psi$$ |
% |
Reduction in cross section on fracture |
| $$KCU\cdot 10^{3}$$ |
$$\frac{J}{m^2}$$ |
Impact toughness |
Description of the casting and technological parameters
| Parameter |
Units of measurement |
Description |
| linear shrinkage |
% |
The difference between model dimensions and the model casting |
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 |
|
|