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Steel 08KH18N12T (0Х18Н12Т)

Steel 10Х18Н5Г9АС4 (EP492; VNS-3) Steel 10Х32Н4Д (EP529) Steel 10Х17Н5М2 (EP405) Steel 10Х17Н13М3Т (ЭИ432) Steel 10Х17Н13М2Т (ЭИ448) Steel 10Х14Г14Н3 (DI-6) Steel 10Х14АГ15 (DI-13) Steel 09Cr17N7Yu1 (0Cr17N7Yu1) Steel 09Х17Н7Ю (ЭИ973) Steel 09Х16Н4Б (EP56; 1Х16Н4Б) Steel 09Х15Н8Ю1 (09Х15Н8Ю; ЭИ904) Steel 08ХГСДП Steel 08Х22Н6Т (EP53) Steel 08Х21Г11А6 (VNS-53) Steel 08Х20Н4АГ10 (НН-3) Steel 08X18Th (DI-77) Steel 08Х18Н7Г10АМ3 (08Х18Н7Г10АМ3С2) Steel 08Cr18Ni5G12AB (HH-3B) Steel 08X18H5G11BAF (HH-3BF) Steel 08X18H4G11AF (HH-3F) Steel 08Cr18Ni12T (0Cr18Ni12T) Steel 08X18H12B (EI402) Steel 08Х18Г8Н2Т (KO-3) Steel 08Cr17Ni6T (DI-21) Steel 20Х13Н4Г9 (ЭИ100) Cr17N14M3T steel Cr17N14M2T steel Steel 95X18 (EI229) Steel 95X13M3K3B2F (EP766) Steel 65X13 Steel 40X13 (4X13) Steel 30X13 (3X13) Steel 26Х14Н2 (EP208) Steel 25X17H2B Steel 25X17H2 (EP407) Steel 25Х13Н2 (ЭИ474) Steel 20X17H2 (2X17H2) Steel 08Х17Н15М3Т (ЭИ580) 18X13H3 steel Steel 15Х18Н12С4ТЮ (ЭИ654; 2Х18Н12С4ТЮ) Steel 15Х17АГ14 (ЭП213) Steel 13Х18Н10Г3С2М2 (ЗИ98) Steel 12Х21Н5Т (ЭИ811; 1Х21Н5Т) Steel 12Х18Н13АМ3 (EP878) Steel 12X18H10E (EP47) Steel 12Х17Н8Г2С2МФ (ЗИ126) Steel 12X17G9AN4 (EI878) Steel 12Х13Г12АС2Н2 (DI50) Steel 11Х13Н3 Steel 03Х16Н15М3 (ЭИ844) 04X15ST steel Steel 04X17H10M2 Steel 03Х23Н6 (ЗИ68) Steel 03Х22Н6М2 (ЗИ67) Steel 03Х21Н25М5ДБ Steel 03Х21Н21М4ГБ (ЗИ35) Steel 03Х20Н45М5Б (ChS32; 03ХН45МБ) Steel 03Х18Н12Т (000Х18Н12Т) Steel 03Х18Н12 (000Х18Н12) Steel 03X18N11 (000X18N11) Steel 03Х17Н14М2 Steel 03X17AN9 (EK177) 04X17T steel Steel 03Х15Н35Г7М6Б (EP855) Steel 03X13AG19 (ChS36) Steel 03Х12Н10МТР (EP810; VNS-25) Steel 03Х12К10М6Н4Т (EP927) Steel 03Х11Н10М2Т2 (EP853) Steel 02Х25Н22АМ2 (ChS108) Steel 02Х21Н25М5ДБ (EC5) Steel 02Х21Н21М4Г2Б (ЗИ69) 02Cr18Ni11 steel Steel 02X17H14M3 Steel 015Х16Н15М3 Steel 06Х14Н6Д2МБТ (EP817) Steel 08Х17Н13М2Т (0Х17Н13М2Т; ЭИ448) Steel 08Х10Н20Т2 (0Х10Н20Т2) Steel 08Х10Н16Т2 (0Х10Н16Т2) Steel 07X21G7AN5 (EP222) Steel 07X18N10P (EP287) Steel 07Х16Н6 (EP288; СН-2А; Х16Н6) Steel 07Х16Н4Б Steel 07Х15Н7М2 (EP35; СН-4; Х15Н8М2Ю) Steel 07Х16Н6 Steel 06X18H11 (EI684) 06X15H4DM steel Steel 08Х17Н5М3 (ЭИ925) 06X13H4DM steel Steel 06Х12Н3Д Steel 06Х12Н3Д (08Х12Н3Д) 05KhGB steel Steel 05Х20Н15АГ6 (ChS109) Steel 05Х12Н9М2С3 (EP821) Steel 05Х12Н2К3М2АФ (VNS-40) Steel 04Х32Н8 (EP535) Steel 04Х25Н5М2 (DI62) Steel 04X19MAFT Steel 04X18H10 (EI842)

Designation

Name The value
Designation GOST Cyrillic 08Х18Н12Т
Designation GOST Latin 08X18H12T
Transliteration 08H18N12T
The chemical elements 08Cr18Н12Ti
Name The value
Designation GOST Cyrillic 0Х18Н12Т
Designation GOST Latin 0X18H12T
Transliteration 0H18N12T
The chemical elements 0Cr18Н12Ti

Description

08KH18N12T steel is used: for the production of cold-rolled sheets and strips high tensile strength; the various parts and structures, welded by spot welding; pipe and fabrication of welded equipment operating in environments of increased aggressiveness (the solutions of nitric, acetic acids, alkaline solutions and salts); structures to be welded by spot welding; hull structures of ships, vessels, marine equipment products and shipyards (pipelines, fittings, fairings, various instruments); hot-rolled seamless pipes machined and the machined designed for stoves and communications neftepererabativaushiy plants.

Note

Low steel, corrosion-resistant.
Stabilized chromium-Nickel steel of austenitic class.
Magnetic permeability μ ≤ 1,01 GS/E. Steel usually contains the α-phase. Unfavorable balance of alloying elements and carbon magnetic permeability can be up to 1.50 GF/C. Heat treatment — austenization or stabilization, the hot pressure treatment and flexible at temperatures primenyaemyh for hot deformation do not alter the permeability, and hardening higher than 5−10% at room or lower temperatures significantly increases it.
Steel 08KH18N12T has practically no ferrite phase and has a high resistance to intergranular corrosion than steel 08KH18N10T.
Steel has low friction properties and prone to scuffing, so is not usually used in friction pairs. To improve the antifriction properties of the nitriding is performed under special conditions with the use of ammonium chloride to remove the oxide film.

Standards

Name Code Standards
Test methods. Packaging. Marking В09 GOST 11878-66
Sheets and stripes В33 GOST 5582-75, GOST 7350-77
Classification, nomenclature and general norms В30 GOST 5632-72
Pipes steel and connecting parts to them В62 GOST 9940-81, GOST 9941-81, GOST 14162-79, TU 14-3-1109-82, TU 14-3-1120-82, TU 14-3-1556-88, TU 14-3-197-89, TU 14-3-561-77, TU 14-3-743-78, TU 14-3Р-197-2001, TU 14-3-1654-89
Bulls. Blanks. Slabs В31 OST 3-1686-90, TU 14-1-1924-76, TU 14-1-565-84, TU 14-1-790-73, TU 14-3-770-78, TU 14-1-2583-78
Castings from non-ferrous metals and alloys В84 RD 9257-76
Thermal and thermochemical treatment of metals В04 STP 26.260.484-2004
Welding and cutting of metals. Soldering, riveting В05 TU 14-1-656-73
Sectional and shaped rolling В32 TU 14-11-245-88

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N V Ti Mo W O Co
TU 14-1-656-73 ≤0.08 ≤0.02 ≤0.035 1-2 17-19 ≤0.8 11-13 The rest ≤0.4 ≤0.02 ≤0.2 - ≤0.3 ≤0.2 ≤0.006 -
RD 9257-76 ≤0.08 ≤0.02 ≤0.035 ≤2 17-19 ≤0.8 11-13 The rest ≤0.4 - ≤0.2 - ≤0.3 ≤0.2 - -
TU 14-3-743-78 ≤0.08 ≤0.02 ≤0.03 ≤2 17-19 ≤0.8 11-13 The rest ≤0.4 - ≤0.2 0.3-0.6 ≤0.3 ≤0.2 - -
TU 14-1-2583-78 ≤0.08 ≤0.015 ≤0.025 ≤1.5 17-19 ≤0.8 11-13 The rest ≤0.25 ≤0.04 - - - - - ≤0.05
Fe is the basis.
According to GOST 5632-72, the content of Ti% = 5C% is 0.6%.
According to TU 14-3-743-78, the titanium content at the lower limit should be at least 0.30%.
According to TU 14-1-2583-78, the chemical composition is given for steel grade 08H18N12T 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 the steel 08X18N12T should be Ti% = 5C% - 0.6%.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2
Tubes of small dimensions (capillary) heat-treated or cold-worked in the state of delivery according to GOST 14162-79
- ≥510 ≥26 - -
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
- - ≥510 ≥35 - -
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 1030-1080 °C
- ≥205 ≥510 ≥43 - -
Bars hot rolled and forged on the other 14-1-656-73. The longitudinal samples. Quenching in water from 1000-1050 °C
- ≥441 ≥50 ≥60 -
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water or air from 1000-1080 °C
≥180 ≥500 ≥40 ≥55 -
Seamless hot deformed tubes in the delivery condition according to GOST 9940-81
- ≥510 ≥40 - -
Seamless hot-rolled pipes on the other 14-3-743-78. Austenization at 1040-1060 °C, air cooling or water
≥216 ≥490 ≥35 ≥55 ≥1176
Seamless tubes with a diameter up to 60 mm cold-worked state beyond 14-3-770-78
≥196 ≥530 ≥35 - -
Tubes seamless cold-and warm of improved quality in the delivery condition on the other 14-3-1109-82
- ≥549 ≥37 - -
Pipe hot rolled, cold rolled and cold drawn. Quenching in water or air with 1060-1080 °C
- ≥550 ≥37 - -

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 r, кг/м3 l, Вт/(м · °С) R, НОм · м a, 10-6 1/°С С, Дж/(кг · °С)
20 1962 7950 1510 750 - 5024
100 - - 1633 - 1660 -
200 - - 1758 - 1700 -
300 - - 1884 - 1720 -
400 - - 2135 - 1750 -
500 - - 2303 - 1790 -
600 - - 2470 - 1820 -
700 - - 2680 - 1860 -
800 - - 2800 - - -
900 - - 2910 - - -
1000 - - 3080 - - -
1100 - - 3230 - - -
1200 - - 3410 - - -

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 Satisfactory weldability. Welding methods: SMAW electrodes DH-15-1 for the root of the weld, CG-15 for the subsequent layers. CT-26 for those cases where no requirements for resistance to the ICC, CBS and ESW. Recommended subsequent heat treatment. For joints of NPP equipment recommended automatic arc welding under flux.
Workability by cutting Has satisfactory machinability. In the hardened state when HB 170 and blower SB=470 MPa Kn TV.SPL.=0,85 Kn b.St.=0,35.
Microstructure The content of ferritic phase in rods with a diameter or a side of a square of 80 mm or more should not exceed 1.0 points (2,5-3,5 %) Rods with a diameter or side of less than 80 mm and the strip is not subjected to a determination of the ferritic phase.
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.

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