Steel 35KH used: for the manufacture of axles, shafts, gears, ring rails, and other upgradable parts, rings of turbogenerators for the production of parts of pipeline fittings from rolled, forged blanks and forgings required heat treatment: quenching in oil and tempering in water or oil.

Note

Structural steel high-quality chrome.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
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 3-1053-86, TU 14-1-1577-76, TU 14-1-1974-77, 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
Bars and shapes	В22	GOST 8319.0-75, GOST 8319.13-75, GOST 8319.4-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Processing of metals by pressure. Forgings	В03	GOST 8479-70, OST 5Р.9125-84, TU 3-896-78, ST ЦКБА 010-2004
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90
Thermal and thermochemical treatment of metals	В04	ST ЦКБА 026-2005
Sheets and strips	В33	TU 14-1-4118-86, TU 14-1-4118-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 4543-71	0.31-0.39	≤0.035	≤0.035	0.5-0.8	0.8-1.1	0.17-0.37	≤0.3	Rest	≤0.3	≤0.05	≤0.03	≤0.15	≤0.2
GOST 10702-78	0.31-0.39	≤0.035	≤0.035	0.5-0.8	0.8-1.1	≤0.2	≤0.3	Rest	≤0.3	≤0.05	≤0.03	≤0.15	≤0.2

Fe is the basis.
According to GOST 4543-71 the content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade steel: P≤0,025%; S≤0.015%; Сu≤0.25%. In accordance with the order, the content of Si = 0.10-0.37% can be established.

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
-	-	-	-	-	-	-	≤170
Steel calibrated and calibrated with special surface finish
-	-	-	≥690	≥5	≥40	-	-
-	-	-	-	-	-	-	≤197
-	-	-	-	-	-	-	≤197
Forgings. Hardening + Vacation
100-300	-	395	615	15	40	540	187-229
100	-	490	655	16	45	590	212-248
Quenching in oil from 840-870 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece) with the following tempering in water or oil
120	500-550	440	635	14	40	539	197-235
Normalization at 850 °C + vacation at 660 °C, air cooling + tempering in water from 850 °C + vacation at 570 °C, cooling in water or oil
30	-	760	880	15	50	780	262
Hardening in water from 850 °C
-	500	880	980	15	53	980	-
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	-
Quenching in oil from 840 °C to + vacation at 580 °C
-	-	460	690	28	-	-	-
Quenching in oil from 840-870 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece) with the following tempering in water or oil
80	500-550	590	685	14	45	588	235-277
Normalization at 850 °C + vacation at 660 °C, air cooling + tempering in water from 850 °C + vacation at 570 °C, cooling in water or oil
50	-	650	820	15	50	780	248
Hardening in water from 850 °C
-	600	680	830	19	61	1270	-
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	-
Quenching in oil from 840 °C to + vacation at 580 °C
-	-	390	700	22	-	-	-
Quenching in oil from 840-870 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece) with the following tempering in water or oil
60	500-550	640	785	13	45	588	248-293
Normalization at 850 °C + vacation at 660 °C, air cooling + tempering in water from 850 °C + vacation at 610 °C, cooling in water or oil
120	-	490	700	15	50	590	207
Hardening in water from 850 °C
-	700	540	710	24	68	1660	-
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	-
Quenching in oil from 840 °C to + vacation at 580 °C
-	-	360	670	22	-	-	-
Quenching in oil from 860 °C to + leave at 500 °C, cooling in water or oil
25	-	735	910	11	45	690	-
Normalization at 850 °C + vacation at 660 °C, air cooling + tempering in water from 850 °C + vacation at 610 °C, cooling in water or oil
160	-	450	670	15	50	590	197
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	-
Quenching in oil from 840 °C to + vacation at 580 °C
-	-	310	540	24	-	-	-
Normalization at 850 °C + vacation at 660 °C, air cooling + tempering in water from 850 °C + vacation at 610 °C, cooling in water or oil
240	-	390	630	15	50	590	187
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	-
Normalization at 850 °C + vacation at 660 °C, air cooling + tempering in water from 850 °C + vacation at 610 °C, cooling in water or oil
80	-	550	740	15	50	780	217
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	-
-	-	883	1010	12	30	392	-
-	-	981	1079	11	30	294	-

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	l, W/(m · °C)	a, 10^-6 1/°C
0	214	83	-	-
20	214	-	-	-
300	207	74	40	129
500	176	65	-	142
100	-	-	47	113
200	-	-	43	12
400	-	-	36	137
600	-	-	-	142
800	-	-	-	146

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 weldability. Welding methods: SMAW, ESW. Recommended heating and subsequent heat treatment. The CCC - recommended subsequent heat treatment.
Склонность к отпускной хрупкости	inclined
The temperature of forging	Start - 1250 °C, the end - of 800 °C.
Flock-sensitive sensitivity	insensitive

Temperature	Е, HPa	G, HPa	l, W/(m · °C)	a, 10^-6 1/°C
0	214	83	-	-
20	214	-	-	-
300	207	74	40	129
500	176	65	-	142
100	-	-	47	113
200	-	-	43	12
400	-	-	36	137
600	-	-	-	142
800	-	-	-	146

Temperature	Е, HPa	G, HPa	l, W/(m · °C)	a, 10^-6 1/°C
0	214	83	-	-
20	214	-	-	-
300	207	74	40	129
500	176	65	-	142
100	-	-	47	113
200	-	-	43	12
400	-	-	36	137
600	-	-	-	142
800	-	-	-	146

Steel 35KH

Designation

Description