04KH18N10 steel is used: for the manufacture of welded equipment operating in environments of increased aggressiveness (nitric acid, nitrate environments, acetic acid, alkaline solutions and salts); teploobmennikov, muffles, pipes, fittings furnace parts, electrodes incendiary spark candles.

Note

Steel corrosion resistant.
Unstabilized chromium-Nickel steel of austenitic class.
04KH18N10 steel has a high resistance to intergranular corrosion than steel grade 08CR18NI10TI.

Standards

Name	Code	Standards
Test methods. Packing. Marking	В09	GOST 11878-66
Processing of metals by pressure. Forgings	В03	GOST 25054-81
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, TU 14-11-245-88
Sheets and strips	В33	GOST 7350-77
Steel pipes and fittings to them	В62	GOST 9940-81, GOST 9941-81, TU 14-1-5410-2001, TU 14-3-1654-89
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-565-84
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 5632-72	≤0.04	≤0.02	≤0.035	≤2	17-19	≤0.8	9-11	Rest	≤0.3	≤0.2	≤0.2	≤0.3	≤0.2

Fe is the basis.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %
Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water or air from 1050-1100 °C
-	≥175	≥490	≥45	-
Forgings ≤100 mm. Hardening in air, 1020-1100 °C
	≥157	≥441	≥40	≥45
Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water with 1020-1100 °C
	≥155	≥440	≥40	≥55
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1050-1100 °C
	≥210	≥510	≥43	-
Tubes in the delivery condition, without heat treatment
-	-	≥441	≥40	-
-	-	≥490	≥45	-

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

Technological properties

Name	The value
Features of heat treatment	Steel used for products, 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 workpiece material is subjected to annealing 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.

Steel 04KH18N10 (ЭИ842)

Designation

Description