Steel 12H18N9TL (10Х18Н9ТЛ)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
12Х18Н9ТЛ |
| Designation GOST Latin |
12X18H9TL |
| Transliteration |
12H18N9TL |
| The chemical elements |
12Cr18Н9Ti |
| Name |
The value |
| Designation GOST Cyrillic |
10Х18Н9ТЛ |
| Designation GOST Latin |
10X18H9TL |
| Transliteration |
10H18N9TL |
| The 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 (cast iron and steel) |
В83 |
GOST 2176-77, KSt 81-033:2009, TU 14-1-1241-75, TU 4112-78269737-009-05 |
| Castings, steel |
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 norms |
В20 |
OST 84-218-85 |
| Welding and cutting of 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 |
The rest |
- |
| GOST 2176-77 |
≤0.12 |
≤0.03 |
≤0.035 |
1-2 |
17-20 |
0.2-1 |
8-11 |
The 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 characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, 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 |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
Physical characteristics
| Temperature |
Е, ГПа |
l, Вт/(м · °С) |
R, НОм · м |
a, 10-6 1/°С |
С, Дж/(кг · °С) |
| 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. |
| Defect welding |
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. |
