Steel SHKH15

Designation

Name	The value
Designation GOST Cyrillic	ШХ15
Designation GOST Latin	ShX15
Transliteration	ShH15
By chemical elements	-

Description

Steel SHKH15 is used: for the production of seamless cold — and hot-deformed tubes for the manufacture of rings, ball and roller bearings; balls with a diameter of 150 mm, roller diameter up to 23 mm; bushings plungers, plungers; pressure valves; housings dispensers; roller tappets and other parts that demand high hardness, wear resistance and contact strength; autogenous round wire with a diameter of 1.4−10.0 mm for the manufacture of balls, rollers and bearing rings.

Note

Steel ШХ15Ф-sh electroslag remelting additionally alloyed with vanadium.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 2590-2006, GOST 2591-2006
Wire, steel, alloy	В73	GOST 4727-83
Steel pipes and fittings to them	В62	GOST 800-78, TU 14-3-1203-83, TU 14-3-335-75
Bars and shapes	В32	GOST 801-78, GOST 7417-75, GOST 14955-77, GOST 21022-75, TU 14-1-1500-75, TU 14-1-2032-76, TU 14-1-232-72, TU 14-1-2398-78, TU 14-132-173-88, TU 14-1-3815-84, TU 14-1-5358-98, TU 14-11-245-88, TU 1142-250-00187211-96
Blanks. Of the workpiece. Slabs	В31	TU 14-1-1213-75, TU 14-1-3680-83, TU 14-1-3911-85, TU 14-1-699-73
Sheets and strips	В33	TU 14-1-2425-78, TU 14-19-18-87
Hard alloys, ceramic-metal products and metal powder	В56	TU 14-22-139-99
Tape	В34	TU 14-4-1112-80
Low carbon steel wire	В71	TU 14-4-563-74

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu
GOST 801-78	0.95-1.05	≤0.02	≤0.027	0.2-0.4	1.3-1.65	0.17-0.37	≤0.3	Rest	≤0.25
GOST 21022-75	0.95-1.05	≤0.01	≤0.025	0.2-0.4	1.3-1.65	0.17-0.37	≤0.3	Rest	≤0.25

Fe is the basis.
According to GOST 801-78 and TU 14-1-3911-85 the chemical composition is given for steel grade SHKh15. The total content of Ni + Cu≤ 0.50%. In steel, obtained by the method of electroslag remelting, the mass fraction of sulfur should not exceed 0.01%, and phosphorus 0.025%. When steel is smelted in acid open-hearth furnaces, the mass fraction of copper is allowed up to 0.30%, while maintaining the norm of the total share of copper and nickel is not more than 0.050%.
According to GOST 21022-75, the chemical composition is given for steel grade SHKh15-DSH, obtained by remelting in vacuum-arc furnace electrodes made of steel SHKh15, made of metal electroslag remelting.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	y, %	KCU, kJ/m²	HB, MPa	HRC
Rolled steel. Quenching in oil from 840 °C to + Vacation
-	200	1960-2200	2160-2550	-	-	-	-	-	61-63
-	300	1670-1760	2300-2450	-	-	-	-	-	56-58
-	400	1270-1370	1810-1910	-	-	-	-	-	50-52
-	450	1180-1270	1620-1710	-	-	-	-	-	46-48
Rolled steel. Quenching in water from 810 °C to 200 °C, then oil + Leave at 150 °C, air cooling
30-60	-	-	≥1670	-	-	-	≥490	-	62-65
A sample with a diameter of 6 mm and a length of 30 mm, the deformed and annealed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥32	≥42	≥61	-	≥100	-	-	-
Rolled steel. Annealing at 800 °C, cooling with the furnace to 730 °C, then to 650 °C at a speed of 10-20 °C/h, air cooling
≤30	-	370-410	590-730	15-25	-	35-55	≥432	179-207	-
A sample with a diameter of 6 mm and a length of 30 mm, the deformed and annealed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥28	≥48	≥62	-	≥100	-	-	-
Rolled steel. Annealing at 800°C, cooling with furnace at a rate of 15 °C/h
≤30	-	370-410	590-730	≥20	-	≥45	≥432	-	-
A sample with a diameter of 6 mm and a length of 30 mm, the deformed and annealed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥20	≥29	≥72	-	≥100	-	-	-
-	-	≥17	≥25	≥61	-	≥100	-	-	-
Rolled steel. Quenching in oil from 860 °C to + Vacation
-	400	-	≥1570	-	-	-	≥147	≥480	-
A sample with a diameter of 6 mm and a length of 30 mm, the deformed and annealed. The rate of deformation of 16 mm/min strain Rate of 0.009 1/s
-	-	≥18	≥22	≥76	-	≥100	-	-	-
Rolled steel. Quenching in oil from 860 °C to + Vacation
-	500	≥1030	≥1270	≥8	≥34	-	≥196	≥400	-
Rolled steel. Hardened in oil from 830 °C to + Leave at 150 °C (1.5 h exposure)
-	-	-	≥2550	-	-	-	≥880	-	-
Rolled steel. Quenching in oil from 860 °C to + Vacation
-	550	≥900	≥1080	≥8	≥36	-	≥235	≥360	-
Rolled steel. Hardened in oil from 830 °C to + Leave at 150 °C (1.5 h exposure)
-	-	-	≥2650	-	-	-	≥690	-	-
Rolled steel. Quenching in oil from 860 °C to + Vacation
-	600	≥780	≥930	≥10	≥40	-	≥334	≥325	-
Rolled steel. Hardened in oil from 830 °C to + Leave at 150 °C (1.5 h exposure)
-	-	-	≥2600	-	-	-	≥640	-	-
Rolled steel. Quenching in oil from 860 °C to + Vacation
-	650	≥690	≥780	≥16	≥48	-	≥54	≥275	-

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
d₄	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
0	211	80	7812	-	-	-
20	211	-	7812	-	-	-
100	-	-	7790	-	390	119
200	-	-	7750	40	470	151
300	-	-	7720	-	520	155
400	-	-	7680	37	-	156
500	-	-	7640	32	-	156
700	-	-	-	-	-	157

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
a	The coefficient of linear expansion

Technological properties

Name	The value
Weldability	Method of welding - CCC.
Склонность к отпускной хрупкости	Inclined.
The temperature of forging	Start - 1150 °C, the end - of 800 °C. the cross Sections up to 250 mm are cooled in air, 251-350 mm - in the pit.
Flock-sensitive sensitivity	Sensitive.
Machinability	In hot-rolled condition, when blower SB 202 HB=740 MPa Kn TV.SPL.=0,90 Kn b.St.=0,36.
Sanding behaviour	Good.