Designation
| Name |
The value |
| Designation GOST Cyrillic |
14Х2ГМРЛ |
| Designation GOST Latin |
14X2GMPL |
| Transliteration |
14H2GMRL |
| By chemical elements |
14Cr2MnMoB |
Description
14KH2GMRL steel is used: for the manufacture of heavy-duty casting parts; responsible welded-cast structures of large sections; basic parts of career and draglines, drilling and hydraulic equipment.
Note
Cold-resistant steel.
Standards
| Name |
Code |
Standards |
| Castings with special properties (iron and steel) |
В83 |
GOST 21357-87 |
| Steel castings |
В82 |
TU 24-1-12-181-75 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
B |
Mo |
| TU 24-1-12-181-75 |
0.1-0.17 |
≤0.04 |
≤0.04 |
0.9-1.2 |
1.4-1.7 |
0.2-0.42 |
≤0.3 |
Rest |
≤0.3 |
0.006 |
0.45-0.55 |
| GOST 21357-87 |
0.1-0.17 |
≤0.02 |
≤0.02 |
0.9-1.2 |
1.4-1.7 |
0.2-0.42 |
≤0.3 |
Rest |
≤0.3 |
0.004 |
0.45-0.55 |
Fe is the basis.
According to GOST 21357-87 boron content - according to calculation.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
d |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Castings according to GOST 21357-87. Quenching in water from 920-930 °C + Vacation at 630-650 °C, air cooling (KCU-60) |
|
≥600 |
≥700 |
- |
≥14 |
≥25 |
≥5 |
- |
| Welded-cast construction. Normalizing at 930 °C + water Quenching from 930 °C to + Vacation at 640 °C, air cooling |
| 100 |
≥650 |
≥740 |
≥17 |
- |
≥60 |
≥127 |
- |
| Annealing at 940 °C, isothermal holding at 750 °C (10 h exposure) |
|
≥370 |
≥600 |
≥14 |
- |
≥25 |
≥320 |
179 |
| Casting on the other 24-1-12-181-75. Normalization at 940-950 °C, air cooling + Tempering in water 920-980 °C + Vacation at 610-640 °C |
| 100 |
≥590 |
≥690 |
- |
≥14 |
≥25 |
≥490 |
217-241 |
| Welded-cast construction. Normalizing at 930 °C + water Quenching from 930 °C to + Vacation at 640 °C, air cooling |
| 140 |
≥640 |
≥720 |
≥14 |
- |
≥25 |
≥121 |
- |
| Annealing at 940 °C, isothermal holding at 750 °C (maintained for 5 h) |
|
≥410 |
≥630 |
≥16 |
- |
≥26 |
≥320 |
196 |
| Welded-cast construction. Normalizing at 930 °C + water Quenching from 930 °C to + Vacation at 640 °C, air cooling |
| 30-60 |
≥590 |
≥710 |
≥17 |
- |
≥50 |
≥134 |
- |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| d |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
Technological properties
| Name |
The value |
| Weldability |
The welding is heated with wall thickness more than 16 mm. the preheating Temperature of 200 °C. welding Method: RDS, ADS under flux and in protective atmospheres. Recommended for relieving stress subsequent vacation at 600-650 °C. |
| Склонность к отпускной хрупкости |
Malosolone. |
