Steel 12H18N9TL (10Х18Н9ТЛ)

Designation

Name	The value
Designation GOST Cyrillic	12Х18Н9ТЛ
Designation GOST Latin	12X18H9TL
Transliteration	12H18N9TL
By chemical elements	12Cr18Н9Ti

Name	The value
Designation GOST Cyrillic	10Х18Н9ТЛ
Designation GOST Latin	10X18H9TL
Transliteration	10H18N9TL
By chemical elements	10Cr18Н9Ti

Description

12H18N9TL steel is used: for the manufacture of castings for various machine parts operating at temperatures not above 700 °C; casting parts, steam, gas, hydraulic turbines and axial compressors operating at temperatures to +650 °C; valves for chemical industry, collectors, exhaust systems, parts, furnace fittings, boxes and lids for pickling baskets and carburizing, other details; 1st, 2nd and 3rd groups casting parts of valves and actuators to it, working in the nitric acid, food and other aggressive environments in the presence of the requirements of high resistance to gas and intergranular corrosion at the working environment temperature from -253 to +610 °C without limitations nominal operating pressure; casting parts for shipbuilding, working in sea water with cathodic protection; casting parts mining and metallurgical equipment; casting equipment parts (valves) for nuclear power stations, heat supply stations, heat and power plants, experimental and research nuclear reactors and installations.

Note

Stabilized chromium-Nickel corrosion resistant, heat resistant up to 750 °C, heat resistant to 600 °C cast steel austenitic.
Steel has a high resistance against gas and intergranular corrosion.

Standards

Name	Code	Standards
Castings with special properties (iron and steel)	В83	GOST 2176-77, KSt 81-033:2009, TU 14-1-1241-75, TU 4112-78269737-009-05
Steel castings	В82	GOST 977-88, OST 108.961.04-80, OST 26-07-402-83, OST 24.920.01-80, OST 3-4365-79, OST 5Р.9285-95, TU 108-23.46-88, TU 4112-091-00220302-2006, ST ЦКБА 014-2004, TU 5.961-11151-92
Classification, nomenclature and General rules	В20	OST 84-218-85
Welding and cutting metals. Soldering, riveting	В05	RTM 108.020.122-78
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu
TU 5.961-11151-92	≤0.12	≤0.03	≤0.035	1-2	17-20	0.2-1	8-11	Rest	-
GOST 2176-77	≤0.12	≤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, OST 5P.9285-95 and TU 5.961-11151-92, the content of Ti = 5 · C% is 0.70%.
According to OST 5R.9285-95, the copper content up to 0.40% and molybdenum up to 0.12% is not a defect sign provided that the requirements of the standard are observed and if there are no special instructions in the technical conditions of the order or drawing.
According to TU 5.961-11151-92 for castings of grades 1 and 2 the mass fraction of cobalt in steel should not exceed 0.20%, and for castings in the direct irradiation zone - 0.15%.
According to GOST 2176-77 the chemical composition is given for steel grade 12H18N9TL. The content of Ti = 5 · C% is 0.80%. 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	HB, MPa
Quenching in water from 1060-1070 °C. Place tenderloin sample center
200	225-245	455-510	30-49	-	172-196	143-156
The castings are supplied according to GOST 2176-77
-	≥196	≥441	≥25	≥32	≥588	-
Austenization at 1100 °C (exposure 4 h), air cooling + Stabilization 800-1020 °C, cooling with the furnace
-	195-235	500-660	24-25	30-35	-	-
Stabilizing annealing at 840-850 °C (exposure 4 h), air cooling. Place clippings of the sample - the edge
200	230-265	65-515	42-53	-	157-208	≥156
Casting parts of gas turbines. Normalization at 1100-1150 °C, cooling with compressed air or water mixture + Vacation at 800 °C (exposure for 10 h), air cooling
-	≥196	≥441	≥25	≥32	≥590	-
Austenization at 1100 °C (exposure 4 h), air cooling + Stabilization 800-1020 °C, cooling with the furnace
-	195	335-370	11-13	25-29	-	-
Castings for shipbuilding. Quenching in water from 1080-1100 °C, cooling in water
-	≥200	≥450	≥25	≥32	≥600	129-183
Austenization at 1100 °C (exposure 4 h), air cooling + Stabilization 800-1020 °C, cooling with the furnace
-	195	355-370	12-17	24-41	-	-
Casting for STP 26.260.484-2004. Quenching in water or air from 1050-1100 °C
	≥200	≥450	≥25	≥32	-	-
Austenization at 1100 °C (exposure 4 h), air cooling + Stabilization 800-1020 °C, cooling with the furnace
-	165	355	23	42-46	-	-
-	185	345	17	35-42	-	-
-	195	305	23	51	-	-
-	155	275	24	47	-	-
-	175	275	17-21	33-39	-	-
-	175	225-255	15-17	26-38	-	-
Castings with wall thickness up to 100 mm in the delivery state on the other 5.961-11151-92. Quenching in water, oil or air from 1050-1100 °C
-	≥200	≥450	≥25	-	≥588	-
-	≥160	≥420	≥22	-	-	-
-	≥150	≥370	≥18	-	-	-
-	≥140	≥330	≥14	-	-	-
-	≥130	≥320	≥11	-	-	-

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
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	194	15	750	-	-
20	194	15	750	-	-
100	189	16	815	168	512
200	176	18	879	17	533
300	165	19	943	174	542
400	149	21	1006	177	554
500	138	22	1031	181	571
600	133	24	1082	185	580
700	125	25	1123	189	580
800	112	26	1152	191	588
900	-	27	1184	191	596
1100	-	-	-	191	-
1000	-	-	-	-	596

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Weldability	Good weldability. Welding methods: RDS and ADS under gas protection. Recommended heating and subsequent heat treatment.
Features of heat treatment	Casting of stabilized steel foundry 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; 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. 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 more austenization 12H18N9TL steel quenching should be carried out 1100 °C. When working in environments that cause stress corrosion cracking, castings should be subjected to stabilizing annealing regime: heating up to 870-900 °C, exposure time of 2-3 h, cooling in air.
Welding defects	Welding defects of castings after cutting is usually carried out without heating. Welding defects of manual welding is done with electrodes type e-08Х19Н10Г2Б (GOST 10052) brand DH-15. After welding and repair of defects by welding is applied heat treatment.