Steel 38Х2НМ

Designation

Name The value
Designation GOST Cyrillic 38Х2НМ
Designation GOST Latin 38X2HM
Transliteration 38H2NM
By chemical elements 38Cr2НMo

Description

Steel 38Х2НМ applies: critical parts of heavy and transport engineering type axles, shafts etc. highly loaded parts and parts used in low temperatures.

Chemical composition

Standard C S P Mn Cr Si Ni Mo
0.32-0.42 ≤0.03 ≤0.03 0.5-0.8 1.8-2.3 0.17-0.37 0.6-0.9 0.2-0.3
Chemical composition is not verified by NTD. Total verified brands for chemical compositions: 2972 ​​from 3363.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
Annealing 850 - 870°C,The Release Of The 590 - 620°C.
300-500 580 740 12 35 450 -
Forging. Hardening 850-870 °C. Leave 590-620 °C. KCU (+20/-40)
300-500 580 740 12 35 45/30 235
Hardening 870-890 °C. The Vacation 620-630 °C.
500-800 680-720 800-860 16-20 58-65 80-120 321
Annealing 850 - 870°C,The Release Of The 590 - 620°C.
500-800 530 700 10 30 400 -
Forging. Hardening 850-870 °C. Leave 590-620 °C. KCU (+20/-40)
500-800 530 700 10 30 40/30 223
Hardening 870-890 °C. the Vacation 640-650 °C. KCU (+20/-40)
270-300 700-830 820-950 10-20 52-70 80-120/50-80 269
Annealing 850 - 870°C,The Release Of The 590 - 620°C.
300 680 830 12 38 500 -
Forging. Hardening 850-870 °C. Leave 590-620 °C. KCU (+20/-40)
300 680 830 12 38 50/35 255
Hardening 870-890 °C. the Vacation 640-650 °C. KCU (+20/-40)
270 600-650 720-780 18-21 58-64 100-120 237
Normalization Of 870 °C. The Vacation Of 640 °C.
600 600-740 700-740 21 54-60 80-120 207
Castings according to GOST 2685-75
- 680 830 12 38 500 -
Normalization of 870-890 °C, air. Vacation 620-630 °C. KCU (+20/-40)
100-300 440 635 14 40 54/40 235
300-500 440 635 13 35 50/35 235
500-800 440 635 12 30 40/30 235
100 440 635 16 45 59/50 235

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
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Technological properties

Name The value
Склонность к отпускной хрупкости inclined
The temperature of forging Start - 1200 °C, the end of - 900 °C.
Flock-sensitive sensitivity sensitive