Structural high alloy steel 36X18H25C2 (EYA3S)

Chemical composition in %

Fe	C	Si	Mn	Ni	S	P	Cr
50.045 — 57.68	0.32 — 0.4	2 — 3	up to 1.5	23 — 26	until 0.02	up to 0.035	17 — 19

Steel production in Russia is carried out in accordance with the technical requirements of GOST 4543−81 and GOST 5632−72. Steel is intended for the manufacture of nozzle heads, furnace parts, boxes for cementation, and other parts that operate continuously at temperatures up to 1000 degrees.

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Heat resistant steels and alloys	Heat resistant high alloy steel

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ni, %	P, %	C, %	S, %
GOST 5632-72	50.045–57.68	2–3	< 1.5	17–19	23–26	< 0.035	0.32–0.4	< 0.02

Information on suppliers

Wish to advertise here?

Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$
Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$	$\varkappa$ , $\frac{W}{m\cdot K}$	$\rho$ , $\frac{kg}{m^3}$
20	200			7800
100		13	15
200	191	13.4
300	186	14.7
400	178
500	171	16.1	22.8
600	162		25.5
700	154		26.3
800	147		37.4

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Rod	GOST 5949-75				640	345	25	40	hardening

Standards

Standard	Description
Standard	Description
GOST 5632-72

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Ni	%	Nickel
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$E\cdot 10^{9}$	$MPa$	Elastic modulus
$\alpha\cdot 10^{6}$	$K^{-1}$	Coefficient of thermal (linear) expansion (range 20°C–T)
$\varkappa$	$\frac{W}{m\cdot K}$	Coefficient of thermal conductivity (the heat capacity of the material)
$\rho$	$\frac{kg}{m^3}$	The density of the material

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture