40HS steel is used: for the manufacture of shafts, gears, clutches, fingers and improve other parts of small dimensions, which are requirements of high strength, elasticity and abrasion resistance.

Note

Structural steel high-quality chromium-silicon.

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 14-1-2118-77, TU 14-1-950-74, TU 14-11-245-88, TU 14-1-5228-93, TU 14-136-367-2008
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
TU 14-1-950-74	0.38-0.45	≤0.025	≤0.025	0.3-0.6	1.3-1.6	1.2-1.6	≤0.3	Rest	≤0.25	≤0.05	≤0.03	≤0.15	≤0.2
GOST 4543-71	0.37-0.45	≤0.035	≤0.035	0.3-0.6	1.3-1.6	1.2-1.6	≤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%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa	HRC
Quenching in water or oil with 870-890 °C + vacation at 600-650 °C, cooling in water or oil
40-110	-	640	830	15	50	863	241-285	-
Quenching in oil from 900 °C + vacation, the cooling after the holidays in the air
-	200	1670	1960	10	40	579	575	-
Quenching in oil or water from 900 °C + vacation at 540 °C, cooling in water or oil
≤25	-	1080	1220	12	40	334	-	-
Quenching in oil from 900 °C + vacation, the cooling after the holidays in the air
-	300	1570	1810	10	43	285	530	-
Quenching in oil from 900 °C + vacation at 640 °C, cooling in water
≤20	-	800	960	19	62	1197	270	-
Quenching in oil from 900 °C + vacation, the cooling after the holidays in the air
-	400	1370	1580	10	45	579	460	-
Quenching in oil from 900 °C + vacation at 640 °C, cooling in water
20-40	-	730	930	19	59	1060	265	-
Quenching in oil from 900 °C + vacation, the cooling after the holidays in the air
-	500	1100	1320	11	50	589	380	-
Quenching in oil from 900 °C + vacation at 640 °C, cooling in water
40-60	-	700	870	19	54	863	250	-
Quenching in oil from 900 °C + vacation, the cooling after the holidays in the air
-	600	900	1030	16	55	765	320	-
Quenching in oil from 900 °C + vacation at 640 °C, cooling in water
60-80	-	670	850	19	52	765	230	-
Quenching in oil from 900-920 °C + vacation at 240-260 °C, air cooling
20-40	-	-	1670	8	40	383	-	46-51
Isothermal annealing with 900-910 °C in the nitrate at 330-350 °C, cooling in air or Quenching in oil with 885-915 °C + vacation at 490-590 °C, cooling in oil
25	-	1080	1226	12	40	343-490	353-401	-

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
HRC	Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature	Е, HPa	G, HPa	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C
0	219	85	7740	-	-
20	219	-	7740	-	-
100	-	-	7720	-	117
200	-	-	7690	36	127
400	-	-	7620	35	14
600	-	-	7540	34	144
300	-	-	-	-	134
500	-	-	-	-	144
800	-	-	-	-	148

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.
Склонность к отпускной хрупкости	inclined
The temperature of forging	Start - 1150 °C, the end - 850 °C. the cross-Section of 75 mm are cooled slowly.
Flock-sensitive sensitivity	sensitive [84]

Steel 40HS

Designation

Description