Steel 30KHN3A

Designation

Name The value
Designation GOST Cyrillic 30ХН3А
Designation GOST Latin 30XH3A
Transliteration 30HN3A
By chemical elements 30CrН3

Description

30KHN3A steel is used: for the manufacture of rims of the driven wheels, forged rings, tractor gear trains, gear and other upgradeable parts. Can be used at temperatures up to -80 °C (with a wall thickness of not more than 100 mm).

Note

Structural steel high-quality stainless.

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, GOST В 5160-89, OST 1 92044-75, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, TU 14-1-4944-90
Tape В34 TU 3-1091-78

Mechanical properties

Section, mm t отпуска, °C sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa HRC
Quenching in oil from 820 °C to + leave at 530 °C, cooling in water
20-25 - 785 980 10 50 765 - -
Quenching in oil from 820 °C to + vacation at 580-600 °C, air cooling
≤20 - 830 930 20 66 - 390 -
Quenching in oil from 820 °C to + vacation
- 200 1460 1620 8 50 785 - 52
- 20 1390 1540 8 56 - - -
Quenching in oil from 850 °C + vacation at 200 °C, air cooling
≤5 - 1420 1670 13 50 648 - 50
Quenching in oil from 820 °C to + vacation at 580-600 °C, air cooling
20-40 - 810 910 20 65 - 380 -
Quenching in oil from 820 °C to + vacation
- 300 1400 1530 7 50 579 - 50
- 250 - 1460 12 57 - - -
Quenching in oil from 850 °C + vacation at 200 °C, air cooling
6-20 - 1370 1670 12 45 481 - 49
Quenching in oil from 820 °C to + vacation at 580-600 °C, air cooling
40-60 - 780 880 20 62 - 370 -
Quenching in oil from 820 °C to + vacation
- 350 1290 1430 8 50 461 - 48
- 20 1270 1320 9 59 - - -
Quenching in oil from 820 °C to + vacation at 580-600 °C, air cooling
60-80 - 730 850 20 61 - 360 -
Quenching in oil from 820 °C to + vacation
- 400 1180 1290 10 52 530 - 45
- 250 - 1250 13 65 - - -
- 500 920 1070 17 60 1050 - 38
- 400 - 730 17 75 - - -
- 600 780 890 21 64 1540 - 33
- 20 1030 1140 12 62 - - -
- 250 - 1090 13 67 - - -
- 400 - 730 17 76 - - -
- 500 - 305 34 82 - - -

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
HRC Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature Е, HPa G, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m a, 10-6 1/°C С, J/(kg · °C)
0 215 84 7850 34 268 - -
20 215 - 7850 34 268 - -
100 207 81 7830 35 317 108 494
200 195 76 7800 36 387 115 504
300 187 72 7770 36 469 122 518
400 175 67 7730 36 567 128 536
500 171 65 7700 35 681 132 558
600 - - 7670 31 817 132 587
700 - - 7690 28 981 - 657
800 - - 7650 27 - 135 703
900 - - 7600 - - - 695
1000 - - - - - - 695
1200 - - - - - - 687

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 limited. Welding methods: SMAW, ESW. Necessary preheating and subsequent heat treatment [50].
Склонность к отпускной хрупкости inclined
The temperature of forging Beginning - 1220 °C, the end - of 800 °C. the cross Sections up to 100 mm are cooled in air, 101-300 mm in the pit.
Flock-sensitive sensitivity sensitive