Steel 45KH

Designation

Name The value
Designation GOST Cyrillic 45Х
Designation GOST Latin 45X
Transliteration 45H
By chemical elements 45Cr

Description

45KH steel is used: for the manufacture of shafts, gears, axles, bolts, connecting rods and other parts, to which pedalada requirements of high hardness, wear resistance, durability and running with little impact.

Note

Structural steel high-quality chrome.

Standards

Name Code Standards
Bars and shapes В32 GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, TU 14-1-5414-2001, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008
Sheets and strips В33 GOST 1577-93
Sheets and strips В23 GOST 82-70, GOST 19903-74, GOST 103-2006, GOST 19903-90
Bars and shapes В22 GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8319.0-75, GOST 9234-74, GOST 11474-76, GOST 2590-2006, GOST 2591-2006
Processing of metals by pressure. Forgings В03 GOST 8479-70, ST ЦКБА 010-2004
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90, 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
Hot-rolled steel and hot rolled with special surface finish
- - - - - - - ≤179
Steel calibrated and calibrated with special surface finish
- - - - - - - ≤229
- - - - - - - ≤229
Quenching in oil from 840 °C to + vacation at 520 °C, cooling in water
25 - 835 1030 9 45 490 -
Hardening + Vacation
500-800 - 315 570 11 30 290 167-207
A rod with a diameter of 25 mm. Quenching in oil from 830 °C
- 300 1490 1710 10 27 - 500
Hardening + Vacation
100-300 - 395 615 15 40 540 187-229
A rod with a diameter of 25 mm. Quenching in oil from 830 °C
- 400 1270 1490 12 37 - 450
Hardening + Vacation
300-500 - 395 615 13 35 490 187-229
A rod with a diameter of 25 mm. Quenching in oil from 830 °C
- 500 1130 1240 17 50 - 375
Hardening + Vacation
500-800 - 395 590 12 33 390 174-217
A rod with a diameter of 25 mm. Quenching in oil from 830 °C
- 600 880 1030 21 60 - 300
Hardening + Vacation
100-300 - 440 635 14 40 540 197-235
A rod with a diameter of 50 mm. Quenching in oil with 820 °C
- 400 1490 1600 4 40 - -
Hardening + Vacation
300-500 - 440 635 13 35 490 197-235
A rod with a diameter of 50 mm. Quenching in oil with 820 °C
- 500 1080 1190 10 52 - -
Hardening + Vacation
≤100 - 490 655 16 45 590 212-248
A rod with a diameter of 50 mm. Quenching in oil with 820 °C
- 600 540 640 20 60 - -
Hardening + Vacation
100-300 - 490 655 13 40 540 212-248
100-300 - 540 685 13 40 490 223-262
≤100 - 590 735 14 45 590 235-277
≤100 - 640 785 13 42 590 248-293
Normalization
≤100 - 315 570 17 38 390 167-207
300-500 - 315 570 12 30 290 167-207
500-800 - 315 570 11 30 290 167-207
≤100 - 345 590 18 45 590 174-217
100-300 - 345 590 17 40 540 174-217
300-500 - 345 590 14 38 490 174-217

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 r, kg/m3 a, 10-6 1/°C
0 206 78 7820 -
20 206 - 7820 -
100 - - - 128
200 - - - 13
300 - - - 13
500 - - - 137

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 Difficult weldability. Welding methods: RDS - necessary heating and subsequent heat treatment. CCC - a necessary subsequent heat treatment.
Склонность к отпускной хрупкости Inclined.
The temperature of forging Start - 1250 °C, the end - 780 °C. the cross Sections up to 100 mm are cooled in air, 101-300 mm - mulde.
Flock-sensitive sensitivity Sensitive.