4H18N25S2 (36H18N25S2)

Steel heat-resistant austenitic grade.

The recommended maximum operating temperature for a long time is +1000 ° C. The temperature of intense scaling in air +1100 ° C.

Steel is resistant to carburizing environments.

It is used for the manufacture of nozzle heads, furnace parts, grout boxes, operating for a long time at temperatures up to +1000 ° С.

Country	Section	Category
CIS, Russia, Ukraine	Corrosion-resistant alloys and steels	Corrosion-resistant alloys

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ti, %	Cu, %	Ni, %	V, %	P, %	C, %	S, %	Mo, %	W, %
GOST 5632-72	48.845–57.68	2–3	< 1.5	17–19	< 0.2	< 0.3	23–26	< 0.2	< 0.035	0.32–0.4	< 0.02	< 0.3	< 0.2

Temperature, °C	$$\rho$$, $$\frac{kg}{m^3}$$
20	7800

Rolling	Standard	Size, mm	Tension	Classifiers	$$\sigma _{U}$$, $$MPa$$	$$\sigma_{0.2}$$, $$MPa$$	$$\psi$$, %	d5, %	Treatment
	GOST 5949-75				> 640	> 345	> 40	> 25	Hot-rolled and forged according to GOST 5949-75. Hardening in air, in oil or in water from 1000-1150 ° C

Standard	Description
GOST 5632-72

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

Parameter	Units of measurement	Description
d5	%	Elongation at break
$$\sigma_{0.2}$$	$$MPa$$	Tensile stress required to produce a total elongation of 0.2%
$$\sigma _{U}$$	$$MPa$$	Ultimate tensile strength
$$\psi$$	%	Reduction in cross section on fracture