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	s_T\|s_0,2, MPa	σ_U, 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
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	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.

Steel 45KH

Designation

Description