25H2GNMFL

Responsible destination details to the wall thickness of 50 mm, operating under static and dynamic loads

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, %	Cr, %	Ni, %	V, %	P, %	C, %	S, %	Mo, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	V, %	P, %	C, %	S, %	Mo, %
GOST 977-88	94.25–96.84	0.3–0.7	0.7–1.1	1.4–2	0.3–0.9	0.04–0.2	< 0.025	0.22–0.3	< 0.025	0.2–0.5

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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				638	491	30	589	12	Final processing - Hardening 880 - 920 ° C, Release 630 - 700 ° C
Castings	GOST 977-88				1275	1079	25	392	5	Final processing - Hardening 900 - 950 ° C, Vacation 260 - 300 ° C

Heat Treatment Modes

Treatment
Treatment
Pre-treatment - Normalization 900 - 950 ° C, Release 650 - 700 ° C
Final processing - Hardening 880 - 920 ° C, Release 630 - 700 ° C
Pretreatment - Normalization 900 - 950 ° C, Release 660 - 680 ° C
Final processing - Hardening 900 - 950 ° C, Vacation 260 - 300 ° 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
Cr	%	Chrome
Ni	%	Nickel
V	%	Vanadium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur
Mo	%	Molybdenum

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