Steel 60С2Х (60S2KHA; 60С2ХАА)

Designation

60С2Х steel is used: for the manufacture of hot rolled plates; large high-loaded springs and leaf springs for critical applications.

Steel spring alloy of high quality.

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Steel wire medium and high carbon	В72	GOST 26366-84
Sheets and strips	В33	GOST 4405-75, TU 14-1-1409-75, TU 14-1-4271-87, TU 302.02.040-89
Bars and shapes	В32	GOST 7417-75, GOST 7419-90, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 14959-79, TU 3-757-83, TU 14-1-2118-77, TU 14-1-3493-82, TU 14-136-327-88, TU 14-11-245-88, TU 14-136-367-2008

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu
GOST 14959-79	0.56-0.64	≤0.025	≤0.025	0.4-0.7	0.7-1	1.4-1.8	≤0.25	Rest	≤0.2

Fe is the basis.
According to GOST 14959-79 the chemical composition is given for steel grade 60С2ХА.

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa	HRC
Rolled sheet. Isothermal annealing with a hold at 290 °C
≤60	-	≥1720	≥1950	≥10	≥46	≥716	-	-
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	200	-	-	-	-	≥226	-	≥59
Rolled sheet. Isothermal annealing with a hold at 290 °C + Vacation at 325 °C
≤60	-	≥1760	≥1920	≥8	≥45	≥490	-	-
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	250	≥2270	≥2380	-	≥28	≥265	-	≥58
-	300	≥2210	≥2340	≥6	≥26	≥255	-	≥58
Spring. Annealing at 860 °C, hot coiling at 850-890 °C. Quenching in oil with 850-870 °C + Vacation at 400-420 °C
-	-	-	-	-	-	-	420-475	-
Rolled steel. Quenching in oil from 870 °C to + Leave at 420 °C, cooling in oil
15-30	-	≥1570	≥1760	≥5	≥20	≥285	-	-
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	350	≥2020	≥2240	≥8	≥26	≥226	-	≥57
Rolled steel. Steel categories: 3, 3A, 3B, 3C, 3D, 4, 4A, 4B. Quenching in oil from 870 °C to + vacation at 470 °C
	-	≥1325	≥1470	≥6	≥25	-	-	-
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	400	≥1830	≥1990	≥8	≥38	≥363	-	≥52
-	450	≥1600	≥1730	≥9	≥39	≥520	-	≥48
-	500	≥1400	≥1530	≥10	≥38	≥461	-	≥44
-	550	≥1240	≥1380	≥10	≥38	≥589	-	≥40

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)

Temperature	Е, HPa	G, HPa
0	196	78

Name	Description
Е	The normal elasticity modulus
G	Modulus of elasticity shear torsion
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Name	The value
Weldability	does not apply to welded structures.
Склонность к отпускной хрупкости	tend not
The temperature of forging	Start - 1200 °C, the end - of 800 °C.
Flock-sensitive sensitivity	not sensitive