Steel 14KH2GMRL

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.