10KH18N9L steel is used: for the manufacture of the 1st, 2nd and 3rd groups of castings of valves for the chemical industry, collectors, exhaust systems, parts, furnace fittings, plates for etching and baskets and other parts operating at temperatures up to +400 °C; the 1st, 2nd and 3rd groups casting parts of valves and actuators to it working in a slightly aggressive media and in a humid atmosphere in the absence of the requirements of resistance to intergranular corrosion, working under the working environment temperature from -253 to +600 °C without restriction of the nominal working pressure; for the manufacture of pipes tsentrobezhnolityh for the manufacture of the coils of the tubular furnace installations production of ammonia, hydrogen, ethylene, carbon disulphide, etc., operating in the temperature range 760−1060 °C and a pressure of 3.92 MPa (40 kgf/cm²); casting parts mining and metallurgical equipment; tsentrobezhnolityh pipes used as components in equipment for metallurgical, engineering, glass, ceramic, mining and processing petrochemical industry, and also intended for the manufacture of blanks and parts used in the composition of the products of aviation and the nuclear industry.

Note

Unstabilized chromium-Nickel corrosion-resistant austenitic steel, heat-resistant to +750 °C.
Steel is unstable in sulfur environments. When the content of carbon in steel is not more than 0.07% resistant against intercrystalline corrosion.

Standards

Name	Code	Standards
Castings with special properties (iron and steel)	В83	GOST 2176-77, KSt 81-033:2009, TU 4112-78269737-009-05
Steel castings	В82	GOST 977-88, OST 26-07-402-83, OST 24.920.01-80, OST 3-4365-79, TU 26-02-19-75, TU 108-23.46-88, TU 4112-091-00220302-2006, ST ЦКБА 014-2004
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004
Steel pipes and fittings to them	В62	TU 1333-047-00220302-02, TU 1333-003-76886532-2014

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu
KSt 81-033:2009	≤0.14	≤0.03	≤0.035	1-2	17-20	0.2-1	8-11	Rest	-
GOST 2176-77	0.07-0.14	≤0.03	≤0.035	1-2	17-20	0.2-1	8-11	Rest	≤0.3

Fe is the basis.
According to GOST 977-88, if it is necessary to provide greater resistance to intergranular corrosion, the carbon content can be set not more than 0.07%.
According to GOST 2176-77 the chemical composition is given for steel grade 10Х18Н9Л. Deviations from the norms of chemical composition are allowed: for carbon ± 0.020%; for silicon ± 0.10%; on manganese, copper, chromium and nickel ± 0.10% each; by titanium and tungsten ± 0.050% each; by vanadium, molybdenum and niobium ± 0.020% each.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²
The castings are supplied according to GOST 2176-77
-	≥176	≥441	≥25	≥35	≥981
Casting for STP 26.260.484-2004. Quenching in water from 1050-1100 °C
100	≥180	≥450	≥25	≥35	≥981

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
y	The relative narrowing
KCU	Toughness

Technological properties

Name	The value
Features of heat treatment	The steel used for the production of foundry goods, not subjected to welding is designed to work in environments do not cause intergranular corrosion. To increase the resistance against General corrosion and eliminate the tendency to intergranular corrosion and to improve the ductility of the casting material are subjected to hardening regime: heating to 1050-1100 °C, cooling in water. The holding time at the heating for hardening to products with a wall thickness up to 10 mm - 30 min, over 10 mm - 20 min + 1 min per 1 mm maximum thickness. For a more complete alignment of a structure, the annealing should be carried out with 1100 °C.

Steel 10KH18N9L

Designation

Description