Steel 10KH18N10T (ЭП502)

Designation

Name	The value
Designation GOST Cyrillic	10Х18Н10Т
Designation GOST Latin	10X18H10T
Transliteration	10H18N10T
By chemical elements	10Cr18Н10Ti

Name	The value
Designation GOST Cyrillic	ЭП502
Designation GOST Latin	EP502
Transliteration	EhP502
By chemical elements	-

Description

10KH18N10T steel is used: for the manufacture of parts welded equipment operating in environments of increased aggressiveness (the solutions of nitric, acetic acids, alkaline solutions and salts), heat exchangers, muffles, pipes, fittings furnace fittings; for the production of billets.

Note

Corrosion-resistant and heat-resistant austenitic with controlled ferrite. The content of the ferritic phase should be between 1.0 and 5.0%. Steel is not inclined to the ICC.

Standards

Name	Code	Standards
Steel pipes and fittings to them	В62	GOST 11068-81, TU 14-3-1391-85, TU 14-3-532-76, TU 14-3-68-72, TU 14-3-761-78, TU 14-3-299-74
Sheets and strips	В23	GOST 19904-90
Welding and cutting metals. Soldering, riveting	В05	OST 26-260.453-92
Blanks. Of the workpiece. Slabs	В31	TU 14-1-1213-75, TU 14-1-1214-75, TU 14-1-1288-75, TU 14-1-1726-76, TU 14-1-632-73, TU 14-1-685-88, TU 14-1-2583-78
Processing of metals by pressure. Forgings	В03	TU 14-1-1530-75, TU 14-1-887-74
Sheets and strips	В33	TU 14-1-2117-77, TU 14-1-2515-78
Bars and shapes	В32	TU 14-1-686-88, TU 14-1-2787-79, TU 14-1-3329-82, TU 14-1-2787-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	Co
TU 14-1-1288-75	0.08-0.12	≤0.02	≤0.02	1-2	17-19	≤0.8	9-11	Rest	≤0.3	-	-
TU 14-1-2515-78	0.08-0.12	≤0.015	≤0.015	≤1	17-19	≤0.8	9-11	Rest	≤0.3	-	-
TU 14-1-2787-2004	0.08-0.12	≤0.015	≤0.025	≤1	17-19	≤0.8	9-11	Rest	≤0.25	-	-
TU 14-1-632-73	0.08-0.12	≤0.015	≤0.015	1-2	17-19	≤0.8	9-11	Rest	≤0.25	-	-
GOST 11068-81	≤0.1	≤0.02	≤0.035	1-2	17-19	≤0.8	10-11	Rest	-	-	-
TU 14-1-686-88	0.08-0.12	≤0.015	≤0.015	≤1	17-19	≤0.8	9-11	Rest	≤0.25	-	-
TU 14-1-2583-78	0.08-0.12	≤0.015	≤0.025	≤1.5	17-19	≤0.8	10-11	Rest	≤0.25	≤0.04	≤0.05

Fe is the basis.
According to TU 14-1-1288-75 the titanium content is Ti = 5С% -0.8%.
According to TU 14-1-2515-78 for steel 10Х18Н10Т-ВД the titanium content Ti = (С-0,02) х5% -0,7%. In the finished product, a deflection of carbon is allowed, minus 0.01%. The content of the remaining elements in accordance with GOST 5632.
According to GOST 11068-81, a deviation in the mass fraction of Ni (nickel) to minus 0.5% is allowed. The titanium content is Ti = (C -0.02) x5% -0.6%.
According to TU 14-1-686-88 the chemical composition is given for steel 10Х18Н10Т-ВД. The content of Ti% = 5C% is 0.7%. The tolerance for carbon content is minus 0.010%. Deviations from the content of elements in the chemical composition of steel, not established by the specification - in accordance with GOST 5632.
According to TU 14-1-2583-78, the chemical composition is given for steel grade 10Х18Н10Т with a limited content of cobalt and melted on a fresh charge using highly pure materials and nickel grades НКС-1 and Н-0. The mass fraction of titanium in 10Х18Н10Т steel should be Ti% = 5С% - 0,6%.
According to TU 14-1-2787-2004, the chemical composition is given for steel grade 10Х18Н10Т-ВД (ЭП502-ВД). The titanium content is Ti = (C -0.02) x5% -0.7%. Allowed in the finished product deviations from the standards of chemical composition: for carbon -0.10%, for phosphorus + 0.0050%. Mass fraction of residual elements - according to GOST 5632. At the request of the consumer, steel is produced with a mass fraction of cobalt of not more than 0.20%.
According to TU 14-1-632-73, the chemical composition is given for steel grade 10Х18Н10Т-ВД (ЭП502-ВД). The titanium content is Ti = (C -0.02) x5% -0.7%. Allowed in the finished product deviations from the norms of chemical composition: carbon -0.10%, phosphorus +0.0050%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %
Steel cold-rolled sheet in the delivery condition (0,8-3,9 mm) TU 14-1-2515-78
	≥196	≥530	≥40	-
	-	≥196	≥40	-
Bars on the other 14-1-2787-2004. The longitudinal samples. Quenching in water or air from 1050-1080 °C
	≥205	≥530	≥40	≥55
	≥186	≥350	≥30	≥40
	≥108	≥270	≥40	≥60
Tubular billet on the other 14-1-1288-75. Quenching in water or air from 1050-1080 °C
	≥235	≥549	≥40	≥55
	≥177	-	-	-
Tubular billet on the other 14-1-686-88. Quenching in water or air from 1050-1080 °C
-	≥245	≥530	≥40	-
-	≥186	≥353	≥30	-
-	≥98	≥274	≥40	-
Pipe-welded heat-treated in the delivery condition (DH=8,0-102,0 mm) according to GOST 11068-81
	≥216	≥530	≥35	-

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
Macrostructure and pollution	The macrostructure of the steel on the other 14-1-686-88 should not have shrinkage, porosity, bubbles, cracks, inclusions, crusts, delamination and placenow visible without using the magnifying devices. For Central porosity, spot inhomogeneity and phase separation the square of the defects of the macrostructure should not exceed the score of I for each type. The presence of layer-by-layer crystallization and the bright contour in the macrostructure of metal is not a rejection symptom. The content of nonmetallic inclusions in steel, the maximum score shall not exceed: oxides and silicates (ON, OS, SH, SP, SN) - 2 points; sulfide (S) - 1 points, nitrides and carbonitrides of titanium (NT) - 4.5 points.
Microstructure	The content of ferrite phase (alpha-phase) in the metal, determined by the magnetic method, it should be in the range of 1-5 %.
Corrosion resistance	The metal must be resistant to intergranular corrosion.