ρ
kgm3
σU
MPa
σP
MPa
ψ
KCU⋅103
Jm2

N12K8M3G2

For products with high strength with sufficient ductility and toughness, high resistance to small plastic deformations, brittle and fatigue failure, used in engineering, instrument making and tool industry martensitic-aging steel.

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Structural steel	High strength high alloy structural steel

Chemical composition

Standard	Fe, %	Mn, %	Co, %	Ni, %	Mo, %
Standard	Fe, %	Mn, %	Co, %	Ni, %	Mo, %
GOST 2591-2006	75	2	8	12	3

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Physical characteristics

Temperature, °C	$\rho$ , $\frac{kg}{m^3}$
Temperature, °C	$\rho$ , $\frac{kg}{m^3}$
20	8140

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	d5, %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\psi$ , %	$KCU\cdot 10^{3}$ , $\frac{J}{m^2}$	d5, %	Treatment
Alloy	GOST 2591-2006				1500	1480	57	0.6	9.6	After aging 480-510 ° C

Standards

Standard	Description
Standard	Description
GOST 2591-2006	GOST 2591-2006

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Mn	%	Manganese
Co	%	Cobalt
Ni	%	Nickel
Mo	%	Molybdenum

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\rho$	$\frac{kg}{m^3}$	The density of the material

Description of mechanical properties

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