20KHN2M steel is used: for the production of calibrando steel; hot rolled steel bars for cold drawing (rolled) rolled steel intended for the production of parts by hot stamping; manufacturing gears, axle shafts, satellites (gear differential), Cams, hinges and other parts.

Note

Structural steel quality romancelatina.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Bars and shapes	В32	GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-2118-77, TU 14-1-2622-79, TU 14-11-245-88, TU 14-136-367-2008
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 14-1-2622-79	0.16-0.21	≤0.035	≤0.035	0.4-0.7	0.4-0.6	0.17-0.37	1.6-2	Rest	-	-	-	-	-
GOST 4543-71	0.15-0.22	≤0.035	≤0.035	0.4-0.7	0.4-0.6	0.17-0.37	1.6-2	Rest	≤0.3	≤0.05	≤0.03	0.2-0.3	≤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%.
According to TU 14-1-2622-79, the allowed deviations in chemical composition and the content of residual elements must comply with GOST 4543. At the request of the consumer, the steel is supplied with synthetic slag treatment. The sulfur content of steel treated with synthetic slag should not exceed 0.012%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa	HRC
Hot rolled long products on the other 14-1-2622-79. Quenching in oil from 860±15 °C + Vacation at 200±30 °C, air cooling. Upon receipt of menswallet below the standards permitted povarnya test with heat treatment by mode: the First quenching in oil from 860±15 °With + second quenching in oil with 780±15 °C + Vacation at 200±30 °C, cooling in oil
15	-	≥687	≥882	≥11	≥50	≥785	415-269	-
Transverse samples. Quenching in oil from 860 °C to + vacation at 200 °C (exposure 2 hours), air cooling
11	-	1210	1420	5	21	373	-	-
Transverse samples. Quenching in oil from 860 °C to + leave (exposure 2 hours)
-	200	1210	1420	5	21	373	-	-
Quenching in oil from 860 °C + quenching in oil from 780 °C to + vacation at 200 °C, cooling in water or oil
≤15	-	685	880	11	50	765	-	-
Transverse samples. Quenching in oil from 860 °C to + vacation at 200 °C (exposure 2 hours), air cooling
8	-	1260	1470	4	21	-	-	-
Transverse samples. Quenching in oil from 860 °C to + leave (exposure 2 hours)
-	600	970	1010	12	42	510	-	-
When carburizing 930-950 °C, air cooling + tempering in oil 810-830 °C + vacation at 180-200 °C, air cooling
15-30	-	930	1180	11	50	765	341	57-63
Transverse samples. Quenching in oil from 860 °C to + vacation at 200 °C (exposure 2 hours), air cooling
8	-	1280	1480	4	21	-	-	-
When carburizing 930-950 °C, air cooling + tempering in oil 810-830 °C + vacation at 180-200 °C, air cooling
30-50	-	830	1080	10	40	579	250-320	57-63
Transverse samples. Quenching in oil from 860 °C to + vacation at 600 °C (exposure 2 hours), air cooling
11	-	970	1010	12	42	510	-	-
8	-	1010	1060	11	27	-	-	-
8	-	1030	1090	11	23	-	-	-

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)

Technological properties

Name	The value
Weldability	RDS heating and subsequent heat treatment.
Склонность к отпускной хрупкости	tend not
The temperature of forging	Start - 1200 °C, the end - of 800 °C. For workpiece cross-section of more than 60 mm cooling slow.
Flock-sensitive sensitivity	sensitive

Steel 20KHN2M (20ХНМ)

Designation

Description