Steel 08KH18N10T (ЭИ914)

Designation

Name	The value
Designation GOST Cyrillic	08Х18Н10Т
Designation GOST Latin	08X18H10T
Transliteration	08H18N10T
By chemical elements	08Cr18Н10Ti

Name	The value
Designation GOST Cyrillic	ЭИ914
Designation GOST Latin	EI914
Transliteration	EhI914
By chemical elements	-

Description

The 08KH18N10T steel is used: for the manufacture of rolled products; forging parts, General engineering; seamless pipes; parts chemical equipment operating in environments of increased aggressiveness (the solutions of nitric, acetic acids, alkaline solutions and salts); heat exchangers, muffles, pipes, fittings furnace parts, electrodes incendiary spark candles; welding and wire welding; machines and equipment for food industry; consumer goods, parts automotive and transport engineering; connections equipment operating in radioactive environments or in contact with aggressive environment; extremely thin-walled cold — and warm-deformed pipes designed for pipelines and constructions for various purposes; as a cladding layer in the manufacture of hot-rolled dual-layer corrosion-resistant sheets; forged and stamping of blanks of non-stationary power installations; flanges and rings for power engineering; cold-rolled steel and roll-formed sections, intended for the manufacture of oblivi and frame of body of passenger cars; seamless cold-rolled, cold-drawn and replicating pipes are designed for pipes and fittings of high quality; bimetallic sheets with aluminum alloy AD1; sheet metal thickness from 40 mm to 160 mm, used in the manufacture of parts and structures of shipbuilding, working in conditions of sea water.

Note

Steel corrosion and heat-resistant.
Stabilized chromium-Nickel steel of austenitic class.
The recommended maximum operating temperature for a long time +800 °C.
Temperature intense scaling in air +850 °C.

Standards

Name	Code	Standards
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Sheets and strips	В23	GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19903-90
Processing of metals by pressure. Forgings	В03	GOST 25054-81, OST 108.109.01-92, OST 5Р.9125-84, TU 108.11.894-87, TU 108.11.930-87, TU 0893-022-00212179-2004, TU 05764417-023-94, TU 108.11.917-87, ST ЦКБА 010-2004
Sheets and strips	В33	GOST 4405-75, GOST 5582-75, GOST 7350-77, GOST 10885-85, GOST Р 51393-99, TU 108-1151-82, TU 108.11.906-87, TU 108-930-80, TU 14-105-451-86, TU 14-1-2542-78, TU 14-1-3199-81, TU 14-1-3874-84, TU 14-1-394-72, TU 14-1-4114-86, TU 14-1-4364-87, TU 14-1-4780-90, TU 14-1-5040-91, TU 14-1-5041-91, TU 14-1-3485-82, TU 05764417-038-95, TU 05764417-048-96, TU 0900-005-05764417-99, TU 5.961-11823-2003
Tape	В34	GOST 4986-79, TU 14-1-1370-75, TU 14-1-4606-89
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 18907-73, TU 14-1-686-88, TU 14-1-2787-79, TU 14-1-3564-83, TU 14-1-3581-83, TU 14-1-5039-91, TU 14-1-748-73, TU 14-11-245-88, TU 14-1-2787-2004, TU 14-131-1110-2013, TU 14-1-1271-75
Steel pipes and fittings to them	В62	GOST 9940-81, GOST 9941-81, GOST 10498-82, GOST 11068-81, GOST 14162-79, GOST 19277-73, GOST 24030-80, TU 14-159-165-87, TU 14-3-1070-81, TU 14-3-1109-82, TU 14-3-1306-85, TU 14-3-1391-85, TU 14-3-197-89, TU 14-3-308-74, TU 14-3-451-75, TU 14-3-561-77, TU 14-3-760-78, TU 14-3-761-78, TU 14-3-769-78, TU 14-3-935-80, TU 1380-001-08620133-93, TU 14-159-249-94, TU 14-3Р-197-2001, TU 14-159-259-95, TU 108-713-77, TU 1380-001-08620133-05, TU 14-158-135-2003, TU 14-3Р-110-2009, TU 14-3Р-115-2010, TU 14-131-880-97, TU 14-225-25-97, TU 14-158-137-2003, TU 95.349-2000, TU 14-3-1654-89
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, OST 95-29-72, TU 3-1083-83, TU 108.668-86, TU 14-105-495-87, TU 14-132-138-86, TU 14-132-163-86, TU 14-1-3844-84, TU 14-1-3845-84, TU 14-1-565-84, TU 14-1-632-73, TU 14-1-685-88, TU 14-1-790-73, TU 14-133-139-82, TU 14-133-177-94, TU 08.001.05015348-92, TU 14-3-770-78, TU 14-1-2583-78, TU 108-11-223-77, TU 14-1-3129-81
Welding and cutting metals. Soldering, riveting	В05	OST 95 10441-2002, OST 24.125.02-89
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004, ST ЦКБА 016-2005
Sheets and strips	В53	TU 1-9-637-74

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	V	Mo	W	Co
TU 108.11.894-87	≤0.08	≤0.02	≤0.035	≤2	17-19	≤0.8	9-11	Rest	≤0.4	-	≤0.2	≤0.3	≤0.2	≤0.025
TU 14-1-3844-84	≤0.08	≤0.02	≤0.035	≤2	17-19	≤0.8	10-11	Rest	≤0.4	-	≤0.2	≤0.3	≤0.2	-
TU 14-1-632-73	≤0.08	≤0.015	≤0.015	1-2	17-19	≤0.8	9-11	Rest	≤0.25	-	-	-	-	-
TU 14-1-686-88	≤0.08	≤0.015	≤0.015	≤2	17-19	≤0.8	9-11	Rest	≤0.25	-	-	-	-	-
TU 14-1-3581-83	≤0.08	≤0.02	≤0.03	≤2	17-19	≤0.8	9-11	Rest	≤0.4	-	≤0.2	≤0.3	≤0.2	-
TU 14-1-748-73	≤0.08	≤0.02	≤0.04	≤2	17-19	≤0.8	9-11	Rest	≤0.4	-	≤0.2	≤0.3	≤0.2	-
TU 14-131-880-97	≤0.08	≤0.02	≤0.035	≤2	17-19	≤0.8	9-11	Rest	≤0.4	-	≤0.2	≤0.3	≤0.2	-
TU 14-1-3874-84	≤0.08	≤0.02	≤0.035	1.2-2	17-18.5	≤0.8	9-10.5	Rest	≤0.4	-	≤0.2	≤0.3	≤0.2	-
GOST 19277-73	≤0.08	≤0.015	≤0.015	1-2	17-19	≤0.8	9-11	Rest	≤0.25	-	-	-	-	-
GOST 24030-80	≤0.08	≤0.02	≤0.035	≤1.5	17-19	≤0.8	10-11	Rest	≤0.4	≤0.05	≤0.2	≤0.3	≤0.2	-
TU 108-713-77	≤0.08	≤0.02	≤0.035	≤2	17-19	≤0.8	10-11	Rest	≤0.3	≤0.05	-	-	-	≤0.04
TU 14-1-2583-78	≤0.08	≤0.015	≤0.025	≤1.5	17-19	≤0.8	10-11	Rest	≤0.25	≤0.05	-	-	-	≤0.05
TU 14-1-2787-2004	≤0.08	≤0.015	≤0.015	≤2	17-19	≤0.8	9-11	Rest	≤0.25	-	-	-	-	-
TU 14-158-137-2003	≤0.08	≤0.02	≤0.035	≤1.5	17-19	≤0.8	9-11	Rest	≤0.4	≤0.05	-	-	-	-

Fe is the basis.
According to GOST 5632-72, TU 108-930-80, TU 14-1-748-73, TU 14-1-3874-84 and TU 108-713-77, the content of Ti% = 5C% is 0.7%.
According to TU 14-1-3581-83 the chemical composition is given for steel 08Х18Н10Т-ВД. The content of Ti% = 5C% is 0.7%.
According to TU 14-1-686-88 the chemical composition is given for steel 08Х18Н10Т-ВД. The content of Ti% = 5C% is 0.6%. 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 108-713-77 (for the production of seamless pipes), the nickel content is allowed up to 11.50%. The content of ferrite, determined in the ladle sample, should be within 1.0-7.0%.
According to TU 14-1-3874-84, according to the agreement between the consumer and the supplier, the steel is treated with synthetic slag (it is introduced by calculation of silicocalcals and cerium (misch metal) in an amount of 0.05-0.20% and 0.01-0.10% respectively, which chemical analysis is not determined). The residual content of aluminum in steel is not more than 0.10%. The ratio of chromium to nickel is not more than 1.8.
According to TU 14-158-137-2003 the content of Ti% = 5С% - 0,6%. It is permissible to introduce cerium and other rare-earth metals according to the calculation by 0.2-0.3%, which are not determined by chemical analysis.
According to GOST 19277-73 the chemical composition is given for steel 08Х18Н10Т-ВД; steel grade 08H18N10T must have a chemical composition in accordance with GOST 5632. The maximum deviation in chemical composition is in accordance with GOST 5632. The mass fraction of titanium in steel 08X18H10T-VD should be Ti% = 5C% - 0.6%.
According to GOST 24030-80, the mass fraction of titanium in steel 08X18H10T should be Ti% = 5С% - 0,6%.
According to TU 14-3Р-115-2010, the mass fraction of titanium in steel 08Х18Н10Т should be Ti% = 5С% - 0,7%, but not less than 0,30%.
According to TU 14-1-2583-78, the chemical composition is given for steel grade 08H18N10T with a limited content of cobalt and smelted on a fresh charge using highly pure materials and nickel grades NKS-1 and H-0. The mass fraction of titanium in steel 08Х18Н10Т should be Ti% = 5С% - 0,6%.
According to TU 14-1-2787-2004, the chemical composition is given for steel grade 08H18N10T-VD (EI914-VD). The titanium content is Ti = C-x5% -0.6%. Allowed in the finished product deviations from the standards of chemical composition: for manganese -0.30%, for titanium + 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 08H18N10T-VD (EI914-VD). The titanium content is Ti = 5C% -0.60%. Allowed in the finished product deviations from the norms of chemical composition: for manganese -0.30%, phosphorus +0.0050%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	d	y, %	KCU, kJ/m²	HB, MPa
Tubes of small dimensions (capillary) heat-treated or cold-worked in the state of delivery according to GOST 14162-79
	-	≥529	≥37	-	-	-	-	-
Long products
-	≥275	≥610	≥41	-	-	≥63	≥245	-
-	≥200	≥450	≥31	-	-	≥65	-	-
-	≥175	≥440	≥31	-	-	≥65	≥313	-
-	≥175	≥440	≥29	-	-	≥65	≥363	-
-	≥175	≥390	≥25	-	-	≥61	≥353	-
-	≥160	≥270	≥26	-	-	≥59	≥333	-
Seamless pipes for oil and fuel lines, heat-treated in the delivery condition according to GOST 19277-73
	-	≥549	≥40	-	-	-	-	-
Billet (forgings) OST 95-29-72 in the state of delivery: Austenization at 1020-1100 °C, cooling in water or air
	≥226	≥490	≥37	-	-	-	-	-
Forgings without machining in the state of delivery on the other 108.11.894-87. The longitudinal samples
20	≥196	≥490	≥38	-	-	≥45	-	-
Billet (forgings) OST 95-29-72 in the state of delivery: Austenization at 1020-1100 °C, cooling in water or air
	≥176	≥352	-	-	-	-	-	-
Forgings without machining in the state of delivery on the other 108.11.894-87. The longitudinal samples
350	≥137	≥314	≥25	-	-	≥40	-	-
Procurement of parts of pipeline fittings from steel 08KH18N10T at ST CKBA 016-2005. Quenching in water or air with 1020-1100 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
≤60	≥196	≥490	≥40	-	-	≥55	-	121-179
Bars on the other 14-1-2787-2004. The longitudinal samples. Quenching in water or air from 1050-1080 °C
	≥205	≥490	≥40	-	-	≥55	-	-
Procurement of parts of pipeline fittings from steel 08KH18N10T at ST CKBA 016-2005. Quenching in water or air with 1020-1100 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
60-100	≥196	≥490	≥39	-	-	≥50	-	121-179
Bars on the other 14-1-2787-2004. The longitudinal samples. Quenching in water or air from 1050-1080 °C
	≥177	≥350	≥30	-	-	≥40	-	-
Procurement of parts of pipeline fittings from steel 08KH18N10T at ST CKBA 016-2005. Quenching in water or air with 1020-1100 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
100-200	≥196	≥490	≥38	-	-	≥40	-	121-179
Tubular billet on the other 14-1-686-88. Quenching in water or air from 1050-1080 °C
-	≥205	≥490	≥40	-	-	-	-	-
Procurement of parts of pipeline fittings from steel 08KH18N10T at ST CKBA 016-2005. Quenching in water or air with 1020-1100 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
200	≥196	≥490	≥35	-	-	≥40	-	121-179
Tubular billet on the other 14-1-686-88. Quenching in water or air from 1050-1080 °C
-	≥176	≥353	≥30	-	-	-	-	-
Procurement of parts of pipeline fittings from steel 08KH18N10T-VD, 08KH18N10T-III for ST CKBA 016-2005. Quenching in water or air with 1040-1060 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)
≤250	≥260	≥490	≥40	-	-	≥55	-	121-179
Seamless tubes for power engineering industry according to GOST 24030-80 (samples, in cross-section is specified outside diameter of pipe)
76	176-333	-	-	-	-	-	-	-
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Quenching in water or air from 1050-1080 °C (samples)
0.2-2	-	≥530	-	≥40	-	-	-	-
Seamless tubes for power engineering industry according to GOST 24030-80 (samples, in cross-section is specified outside diameter of pipe)
≤76	176-343	-	-	-	-	-	-	-
Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Quenching in water or air from 1050-1080 °C (samples)
0.2	-	≥530	-	≥20	-	-	-	-
Seamless tubes for power engineering industry according to GOST 24030-80 (samples, in cross-section is specified outside diameter of pipe)
	-	≥549	≥37	-	-	-	-	-
Sheet cold rolled steel in the delivery state on the other 14-1-3874-84
0.5-1	≤285	510-640	-	≥50	-	-	-	-
Seamless tubes for power engineering industry according to GOST 24030-80 (samples, in cross-section is specified outside diameter of pipe)
≤76	176-323	-	-	-	-	-	-	-
≤76	≥147	-	-	-	-	-	-	-
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Quenching in water or air from 1050-1080 °C
-	-	≥530	≥40	-	-	-	-	-
Pipe seamless. Heating to 950-1050 °C, rapid cooling in air or in water (in cross-section shows the thickness of the wall)
≤15	≥216	≥549	≥37	-	-	≥55	-	-
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 1000-1080 °C
-	≥205	≥510	≥43	-	-	-	-	-
Forgings for parts resistant to the ICC. Quenching from 1000-1050 °C in oil, water or air
100-300	196-210	≥490	≥38	-	-	≥45	-	121-179
Pipe seamless. Heating to 950-1050 °C, rapid cooling in air or in water (in cross-section shows the thickness of the wall)
15	≥216	≥510	≥37	-	-	≥55	-	-
Forgings for parts resistant to the ICC. Quenching from 1000-1050 °C in oil, water or air
60-100	196-210	≥490	≥39	-	-	≥50	-	121-179
Pipe seamless. Heating to 950-1050 °C, rapid cooling in air or in water (in cross-section shows the thickness of the wall)
	≥176	≥372	≥35	-	-	≥45	-	-
Forgings for parts resistant to the ICC. Quenching from 1000-1050 °C in oil, water or air
60	196-210	≥490	≥40	-	-	≥55	-	121-179
Forgings. Quenching in air, oil or water 1050-1100 °C
	≥196	≥490	≥35	-	-	≥40	-	-
The cold rolled sheets and decks cold-shaped sections heat-treated in the delivery condition according to GOST R 51393-99. Quenching in water or air from 1050-1080 °C
-	≥205	≥520	≥40	-	-	-	-	-
Bars calibrated in delivery condition (cold-worked) on the other 14-1-3581-83
20-25	≥225	≥539	≥25	-	-	≥55	-	-
Bars of polished, processed on a given strength (TS) according to GOST 18907-73
1-30	-	590-830	-	-	≥20	-	-	-
Rolled steel in delivery condition (longitudinal samples)
≤8	-	1400-1600	≥20	-	-	-	-	-
3.5-32	-	≥510	≥40	-	-	-	-	-
Bars hot rolled and forged according to GOST 5949-75. Quenching in air, oil or water with 1020-1100 °C
	≥196	≥490	≥40	-	-	≥55	-	-
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1050-1150 °C
	≥200	≥500	≥40	-	-	≥55	-	-
Bars hot rolled and forged at STP 26.260.484-2004. Stabilizing annealing at 870-900 °C, air cooling or Stepwise treatment regime: heating to 1050-1100 °C; the holding time at the heating for products with wall thickness up to 10 mm - 30 min, over 10 mm - 20 min + 1 min per 1 mm of maximum thickness; cooling as fast as possible to 870-900°C; holding at 870-900 °C for 2-3 hours; cooling with the furnace to 300 °C (speed of 50-100 °C/h), then in the air
	≥200	≥500	≥35	-	-	≥50	-	-
Pre-painted steel sheet heat-treated (softening) on the other 14-1-3199-81
0.5-3	≥274.4	≥529.2	≥40	-	-	-	-	-
Tubular billet heat-treated on the other 14-1-3844-84. Samples of longitudinal and tangential
	-	≥510	≥40	-	-	-	-	-
Bericochea tubes seamless cold-deformed (cold rolled, cold drawn and toplokatie) TU 14-3-769-78. Heat-treated in the delivery condition
	≥196	≥529	≥35	-	-	-	-	-
Seamless hot deformed tubes in the delivery condition according to GOST 9940-81
	-	≥510	≥40	-	-	-	-	-
Seamless tubes with a diameter up to 60 mm cold-worked state beyond 14-3-770-78
	≥196	≥530	≥37	-	-	-	-	-
Tubes seamless cold-and warm of improved quality in the delivery condition on the other 14-3-1109-82
	-	≥558	≥38	-	-	-	-	-
Extremely thin-walled tubes cold - and warm-deformed (wall thickness 0.2-1.0 mm) as supplied
	-	≥549	-	≥40	-	-	-	-
Pipe pressingly hex heat-treated on the other 14-131-880-97
	≥196	≥490	≥40	-	-	≥55	-	-
Pipe tsentrobezhnolityh heat-treated in the delivery condition according to TU 14-3P-115-2010. Quenching in water or air under the fan with 1050-1080 °C
	≥180	≥460	≥35	-	-	-	-	-
Pipe-welded heat-treated in the delivery condition (DH=8,0-102,0 mm)
	≥216	≥530	≥37	-	-	-	-	-

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
d₄	Elongation after rupture
d	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C
0	196	7900	-	-
20	196	7900	-	-
100	-	-	16	161
200	-	-	18	-
300	-	-	19	161
500	-	-	-	174
700	-	-	-	182
900	-	-	-	191

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity
a	The coefficient of linear expansion
С	Specific heat

Technological properties

Name	The value
Weldability	Welding methods: SMAW, ADS submerged arc and gas protection, ARDS, CBS and ESW. For NPP equipment - automatic arc welding with non-consumable electrode in a continuous mode, manual argon arc welding with non-consumable electrode (filler or without filler material) allowed manual arc welding with coated electrodes. For manual arc welding using electrodes of the EA-400/10U; for automatic submerged arc - wire Св04Х19Н11МЗ flux RP-6, welding wire SV-08Х19Н10МЗБ with flux an-26; for welding in shielding gas Ar welding wire SV-04Х19Н11МЗ or SV-08Х19Н10МЗБ. To prevent the tendency to stab corrosion of welded assemblies running in nitric acid welded assemblies are subjected to tempering in air 970-1020 °C; the temperature should be kept at the upper limit (the speed is not less than 2,5 min/mm of maximum wall thickness, but not less than 1 hour). In the case of welding wire SV 04Х19Н11М3 or electrodes type e-07Х19Н11М3Г2Ф (grade EA-400/10U, EA-400/10T, wire St 04Х19Н11М3, etc.) applied annealing in air from 950-1050 °C (aged for at least 2.5 minutes/mm of maximum wall thickness, but not less than 1 hour). In the case of welding electrodes type e-08Х19Н10Г2МБ (stamps EA 898/21 B, etc.) to relieve residual stresses in welded assemblies: a) working at 350 °C and above; b) operating at temperatures above 350 °C, if the hardening is impractical to apply a stabilizing annealing at 850-920 °C (extract after heating the batch for at least 2 hours). To relieve residual stresses of welded assemblies operating at temperatures above 350 °C, after final mechanical machining (before lapping) if the carrying out of other types of heat treatment applied is inappropriate vacation at 375-400 °C (delay of 6-10 h), air cooling. In the case of welding of pipes with internal diameter not less than 100 mm and more to the body (without delay) in accordance with KD applies a stabilizing annealing at 950-970 °C, air cooling.
The temperature of forging	Beginning - 1220 °C, the end of - 900 °C. the cross Sections up to 300 mm are cooled in air.
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 forgings should be no more than 15%. Ferritic phase is controlled in the smelting by the method of branch materials-science organization on ferritometer FTS-2.
Particularities of production of goods	The 08KH18N10T steel has good polishability and excellent ability to deep drawing.
Features of heat treatment	Depending on assignment, working conditions, corrosive environment the product is subjected to: a) hardening (austenization); b) stabilizing annealing; C) annealing for stress relieving; d) a stepwise processing. The product is quenched in order to: a) prevent the tendency to intergranular corrosion (products can operate in temperatures up to 350 °C); b) to increase resistance against General corrosion; C) to eliminate the revealed tendency to intergranular corrosion; g) to prevent the tendency to stab corrosion (welded work product in solutions of nitric acid); d) to eliminate residual stress (products simple configuration); e) to increase the plasticity of the material. The quenching products should be carried out on mode: heating to 1050-1100 °C, items material thickness up to 10 mm cooling on air, more than 10 mm in water. Welded parts of complex configuration in order to avoid the leash is to be cooled in the air. 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. In the hardening of products, intended for operation in nitric acid, the heating temperature for hardening must be kept at the upper limit (exposure at the same weldment should be not less than 1 hour). Stabilizing annealing is applied to: a) prevent the tendency to intergranular corrosion (products work at temperatures above 350 °C); b) stress relief; C) the elimination of discovered tendency to intergranular corrosion, if for any reason hardening is inappropriate. A stabilizing annealing, for example for products and welded joints of steels in which the ratio of titanium to carbon 5 or more of niobium to carbon greater than 8. Stabilizing annealing to prevent the tendency to intergranular corrosion products, operating at temperatures over 350 °C can be subjected to steel containing not more than 0.08 % of carbon. Stabilising annealing should be carried out according to the mode: heating up to 870-900 °C, exposure time of 2-3 h, cooling in air. During heat treatment of large welded products are permitted to carry out local stabilizing annealing of closing seams in the same mode, with all welded components shall be subjected to a stabilizing annealing before welding. In the case of local stabilizing annealing is necessary to ensure both uniform heating and cooling across the length of the weld and adjacent base metal zones for a width equal to two or three widths of a seam, but not more than 200 mm. Manual heating method is invalid. For a more complete removal of residual stresses, the annealing products of stabilized chromium-Nickel steels is performed according to the mode: heating up to 870-900 °C; exposure of 2-3 h, cooling with the furnace to 300 °C (cooling rate of 50-100 °C/h), then by air. The annealing is carried out for products and welded joints of steel, from which the ratio of titanium to carbon 5 or more of niobium to carbon greater than 8. Step processing is to: a) relieve residual stresses and prevent the tendency to intergranular corrosion; b) to prevent the tendency to intergranular corrosion of welded joints of complex configuration with sharp transitions in thickness; C) products with the tendency to intergranular corrosion, remove which other method (annealing or stabilizing annealing) is inappropriate. Step treatment should be carried out according to mode: heating to 1050-1100 °C; 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 of maximum thickness; cooling as fast as possible to 870-900°C; holding at 870-900 °C for 2-3 hours; cooling with the furnace to 300 °C (speed of 50-100 °C/h), then by air. To expedite the process, step-by-step treatment is recommended in two in two furnaces heated to different temperatures. When transferring from one furnace to another, the temperature of the products should not be below 900 °C. Speed of processing permitted for products and welded joints of steel, from which the ratio of titanium to carbon 5 or more of niobium to carbon greater than 8.
Corrosion resistance	Steel is unstable in sulfur-containing environments and is used when cannot be applied, Nickel-free steel. Steel 08KH18N10T withstand more aggressive environments than in steel of grade 12KH18N10T and 12Х18Н12Т and has greater resistance to intergranular corrosion.
Wear resistance	Steel resistant to wear and tear.