σU
MPa
σY
MPa
ψ
KCU⋅103
Jm2

40G1 (5FL)

for producing castings for various industrial applications

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Steels and alloys for castings	Ordinary steel for castings

Chemical composition

Standard	Fe, %	Si, %	Mn, %	V, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	V, %	P, %	C, %	S, %
GOST 977-88	96.87–97.75	0.2–0.5	1.6–1.9	0.1–0.2	< 0.04	0.35–0.45	< 0.04

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Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{Y}$ , $MPa$	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	d5, %	Treatment
Castings	GOST 977-88				819	520	20	285	8	Tempering 860 - 870 ° C, Vacation 640 - 660 ° C

Heat Treatment Modes

Treatment
Treatment
Tempering 860 - 870 ° C, Vacation 640 - 660 ° C

Standards

Standard	Description
Standard	Description
GOST 977-88

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
V	%	Vanadium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
d5	%	Elongation at break
$\sigma_{Y}$	$MPa$	Yield strength
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\psi$	%	Reduction in cross section on fracture
$KCU\cdot 10^{3}$	$\frac{J}{m^2}$	Impact toughness