Steel 60S2KHFA

Designation

60S2KHFA steel is used: for the manufacture of hot rolled plates; responsible and heavy-duty springs and leaf springs.

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
Bars and shapes	В32	GOST 7417-75, GOST 7419-90, GOST 8559-75, GOST 8560-78, GOST 14959-79, TU 14-1-2118-77, TU 14-1-2265-77, TU 14-1-4343-89, TU 14-11-245-88, TU 14-136-367-2008

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V
GOST 14959-79	0.56-0.64	≤0.025	≤0.025	0.4-0.7	0.9-1.2	1.4-1.8	≤0.25	Rest	≤0.2	0.1-0.2

Fe is the basis.

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HRC
Rolled sheet. Quenching in oil at 880 °C to + Vacation at 450-550 °C
≤80	-	≥1540	≥1640	≥10	≥35	≥432	45-49
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	200	-	-	-	-	≥294	≥59
Rolled sheet. Isothermal annealing with a hold at 290 °C
≤60	-	≥1780	≥1960	≥11	≥39	≥736	-
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	250	≥2190	≥2340	≥6	≥20	≥294	≥58
Rolled sheet. Isothermal hardening with aging at 290 °C (1 h) + Vacation at 325 °C
≤60	-	≥1810	≥1960	≥8	≥38	≥657	45-51
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	300	≥2180	≥2340	≥6	≥22	≥314	≥58
Rolled steel. Quenching in oil from 850 °C + Vacation at 410 °C, cooling in oil
10-20	-	≥1670	≥1860	≥5	-	-	-
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	350	≥2160	≥2240	≥6	≥24	≥324	≥57
Rolled steel. Steel categories: 3, 3A, 3B, 3C, 3D, 4, 4A, 4B. Quenching in oil from 870 °C to + vacation at 470 °C
	-	≥1470	≥1670	≥6	≥25	-	-
Rolled steel. Quenching in oil with 880-890 °C + Vacation
-	400	≥1870	≥1930	≥7	≥29	≥363	≥53
-	450	≥1690	≥1810	≥8	≥35	≥383	≥49
-	500	≥1540	≥1640	≥10	≥35	≥432	≥46
-	550	≥1440	≥1530	≥10	≥37	≥461	≥43

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
HRC	Rockwell hardness (indenter diamond spheroconical)

Temperature	Е, HPa	G, HPa	r, kg/m³
20	191	77	1850

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	Malosolone.
The temperature of forging	Start - 1200 °C, the end - of 800 °C. slow Cooling, a subsequent heat treatment - annealing.