Steel 38KHN3MA

Designation

Name The value
Designation GOST Cyrillic 38ХН3МА
Designation GOST Latin 38XH3MA
Transliteration 38HN3MA
By chemical elements 38CrН3Mo

Description

38KHN3MA steel is used: for the production of shafts, axles, gears, rings, turbine generators and other large critical components.

Note

Structural steel high-quality romancelatina.

Standards

Name Code Standards
Sheets and strips В23 GOST 103-2006
Bars and shapes В22 GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Bars and shapes В32 GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008
Processing of metals by pressure. Forgings В03 GOST 8479-70, TU 3-896-78, ST ЦКБА 010-2004
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-3202-81, TU 14-1-4944-90

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
Quenching in oil from 850 °C + vacation at 590 °C, air cooling
≤25 - 980 1080 12 50 765 -
Rod. Quenching in oil from 850 °C + vacation at 580-600 °C, air cooling
≤30 - 940 1060 12 50 961 -
Quenching + tempering (forgings)
300-500 - 640 785 11 33 432 248-293
Quenching in oil from 840 °C to + Vacation
- 200 1520 1710 10 48 765 475
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
- - 294 491 16 30 294 -
Rod. Quenching in oil from 850 °C + vacation at 580-600 °C, air cooling
120-160 - 840 1000 10 45 579 -
Quenching + tempering (forgings)
500-800 - 640 785 10 30 383 248-293
Quenching in oil from 840 °C to + Vacation
- 300 1400 1570 10 49 383 440
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
- - 392 589 16 30 491 -
Rod. Quenching in oil from 850 °C + vacation at 580-600 °C, air cooling
160-200 - 800 980 10 45 579 -
Quenching + tempering (forgings)
500-800 - 685 835 10 30 383 262-311
Quenching in oil from 840 °C to + Vacation
- 400 1250 1370 10 50 481 400
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
- - 491 687 16 30 392 -
Rod. Quenching in oil from 850 °C + vacation at 580-600 °C, air cooling
200-240 - 780 980 10 45 579 -
Quenching + tempering (forgings)
300-500 - 735 880 11 30 383 277-321
Quenching in oil from 840 °C to + Vacation
- 500 1080 1220 12 54 765 350
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
- - 589 765 16 35 491 -
Rod. Quenching in oil from 850 °C + vacation at 580-600 °C, air cooling
30-50 - 900 1040 12 50 961 -
Quenching + tempering (forgings)
500-800 - 735 930 10 30 383 293-331
Quenching in oil from 840 °C to + Vacation
- 600 900 1030 17 60 1158 300
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
- - 687 834 14 35 491 -
Rod. Quenching in oil from 850 °C + vacation at 580-600 °C, air cooling
50-80 - 880 1020 12 50 961 -
Normalization (forgings)
100-300 - 685 835 12 38 481 262-311
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
- - 785 932 13 35 392 -
Rod. Quenching in oil from 850 °C + vacation at 580-600 °C, air cooling
80-120 - 860 1020 12 50 765 -
Normalization (forgings)
300-500 - 685 835 11 33 383 262-311
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
- - 883 1010 12 30 392 -
Normalization (forgings)
100-300 - 735 880 12 35 481 277-321
Forged billet rings for turbine generators of thermal power plants up to 500 MW I-VIII categories THAT 3-896-78 (samples tangential)
- - 981 1079 11 30 294 -

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

Physical characteristics

Temperature Е, HPa G, HPa l, W/(m · °C) R, Mr. · m a, 10-6 1/°C С, J/(kg · °C)
0 207 82 36 292 - -
20 207 - 36 292 - -
100 203 80 36 317 118 496
200 196 77 36 358 123 508
300 192 76 35 425 127 525
400 182 72 34 506 131 538
500 173 69 33 602 134 567
600 167 66 31 742 137 601
700 147 57 30 890 139 672
800 135 53 29 1100 139 672
1000 - - - - 108 697

A description of the physical symbols

Name Description
Е The normal elasticity modulus
G Modulus of elasticity shear torsion
r Density
l Coefficient of thermal conductivity
R UD. the resistivity

Technological properties

Name The value
Weldability does not apply to welded structures.
Склонность к отпускной хрупкости tend not
The temperature of forging Start - 1200 °C, the end - 850 °C.
Flock-sensitive sensitivity highly sensitive