Steel 10KH18N10T (ЭП502)
|Designation GOST Cyrillic||10Х18Н10Т|
|Designation GOST Latin||10X18H10T|
|By chemical elements||10Cr18Н10Ti|
|Designation GOST Cyrillic||ЭП502|
|Designation GOST Latin||EP502|
|By chemical elements||-|
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.
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.
|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|
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%.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||y, %|
|Steel cold-rolled sheet in the delivery condition (0,8-3,9 mm) TU 14-1-2515-78|
|Bars on the other 14-1-2787-2004. The longitudinal samples. Quenching in water or air from 1050-1080 °C|
|Tubular billet on the other 14-1-1288-75. Quenching in water or air from 1050-1080 °C|
|Tubular billet on the other 14-1-686-88. Quenching in water or air from 1050-1080 °C|
|Pipe-welded heat-treated in the delivery condition (DH=8,0-102,0 mm) according to GOST 11068-81|
Description mechanical marks
|sT|s0,2||Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%|
|σU||Limit short-term strength|
|d5||Elongation after rupture|
|y||The relative narrowing|
|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.|