Steel 15KH18N12S4TJU (ЭИ654; 2Х18Н12С4ТЮ)
|Designation GOST Cyrillic||15Х18Н12С4ТЮ|
|Designation GOST Latin||15X18H12C4TJu|
|By chemical elements||15Cr18Н12С4TiAl|
|Designation GOST Cyrillic||ЭИ654|
|Designation GOST Latin||EI654|
|By chemical elements||-|
|Designation GOST Cyrillic||2Х18Н12С4ТЮ|
|Designation GOST Latin||2X18H12C4TJu|
|By chemical elements||2Cr18Н12С4TiAl|
15KH18N12S4TJU steel is used: for the manufacture of welded structures operating in air and aggressive environments, in particular for concentrated nitric acid; welding wire used for welding parts and welding of steel structures in energy engineering; welding electrodes; rings welded goryachekatny and extruded sections; shaped castings for the aviation industry.
Austenite corrosion resistant steel-ferritic class.
|Processing of metals by pressure. Forgings||В03||GOST 25054-81, ST ЦКБА 010-2004|
|Tape||В34||GOST 4986-79, TU 14-1-1073-74|
|Sheets and strips||В33||GOST 5582-75, GOST 7350-77, TU 14-1-1337-75, TU 14-1-2476-78, TU 14-1-3669-83, TU 14-1-659-73|
|Classification, nomenclature and General rules||В30||GOST 5632-72|
|Bars and shapes||В32||GOST 5949-75, OST 1 90363-85, TU 14-1-3217-81, TU 14-1-561-73, TU 14-1-915-74, TU 14-11-245-88|
|Castings with special properties (iron and steel)||В83||OST 1 90090-79|
|Blanks. Of the workpiece. Slabs||В31||OST 3-1686-90, TU 14-1-1214-75, TU 14-1-2350-78, TU 14-1-4590-89|
|Thermal and thermochemical treatment of metals||В04||STP 26.260.484-2004, ST ЦКБА 016-2005|
|Welding and cutting metals. Soldering, riveting||В05||TU 14-1-997-74, TU 14-1-997-2012|
|Steel pipes and fittings to them||В62||TU 14-3-310-74|
|OST 1 90090-79||0.13-0.19||≤0.025||≤0.025||0.5-1||17-19||3.8-4.5||10-13||Rest||≤0.3||≤0.05||0.12-0.33||≤0.05||0.4-0.7||≤0.2||≤0.2|
According to GOST 5632-72 and TU 14-1-997-74 the chemical composition is given for steel grade 15H18N12S4TU (EI654).
According to OST 1 90090-79 the chemical composition is given for steel grade 15H18N12S4TYUL (EI654L).
According to TU 14-1-3669-83, the chemical composition is given for steel grade 15Х18Н12С4ТЮ (ЭИ654) and 15Х18Н12С4ТЮ-Ш (ЭИ654-Ш). The sulfur content in the steel grade and 15Х18Н12С4ТЮ-Ш (ЭИ654-Ш) should not exceed 0,015%. In the finished steel, regardless of the grade of steel, the following deviations from the chemical composition are allowed: carbon +0.010%, chromium + 0.20 / -0.10%, nickel +0.20%, titanium -0.020%, for silicon -0.10%, for aluminum ± 0.030%. The content of residual elements is in accordance with GOST 5632.
According to TU 14-1-561-73, the chemical composition is given for steel grades 15Х18Н12С4ТЮ (ЭИ654), 15Х18Н12С4ТЮ-Ш (ЭИ654-Ш). Deviations in chemical composition are allowed: for carbon ± 0.010%, for titanium -0.020%, for aluminum ± 0.020%. The sulfur content in the electroslag remelting metal should not exceed 0.015%. The residual copper content should not exceed 0.30%, molybdenum 0.30%, vanadium -0.20%, tungsten 0.20%.
According to TU 14-1-915-74, the chemical composition is given for steel grade 15Х18Н12С4ТЮ-Ш (ЭИ654-Ш). Deviations in chemical composition are allowed: by carbon +0.010%, by chromium + 0.20 / -0.10%, by nickel +0.20%, by titanium -0.020%, by silicon -0.10%, by aluminum ± 0.030%. The residual mass fraction of tungsten and vanadium is not more than 0.20% of each, molybdenum and copper - not more than 0.30% of each.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||d4||d||d10||y, %||KCU, kJ/m2||HB, MPa|
|Blank pieces of pipe fittings according to ST CKBA 016-2005. Quenching in water from 950-1050 °C (aging of 1.0 to 1.5 min/mm of maximum cross section but not less than 0.5 h)|
|The tape is able to on the other 14-1-1073-74|
|Nagarebana cold-rolled tape of 0.05-2.00 mm according to GOST 4986-79 on delivery|
|Cold-rolled steel strip of 0.05-2.00 mm according to GOST 4986-79. Quenching in water from 1020-1050 NN the fire °C (samples)|
|Sheet full hard GOST 5582-75. Quenching in water from 950-1050 °C|
|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 from 1020-1050 NN the fire °C (δ in the graph indicated the value of δ25)|
|Hot rolled sheet (4,0-25,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Quenching in water or air with 1020-1050 NN the fire °C|
|Hot rolled sheet (2.0 to 3.9 mm) and cold rolled (0.8-3.0 mm) as supplied on THAT 14-1-3669-83. Quenching in water from 1020-1050 NN the fire °C (for the soft state)|
|The casting and the ceramic mold. Quenching in water from 1130-1150 °C|
|Bars hot rolled and forged on the other 14-1-561-73. Quenching in water from 950-1050 °C. In the graph indicates the value of KCU KCU longitudinal/transverse KCU samples|
|Bars hot rolled and forged on the other 14-1-915-74. Quenching in water from 950 °C. samples longitudinal KCU/KCU samples transverse|
|Bars hot rolled and forged according to GOST 5949-75. Quenching in water from 950-1050 °C|
|Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water from 1020-1050 NN the fire °C|
|Rolled plates in the state of delivery on the other 14-1-1337-75. Quenching in water or air with 1020-1050 NN the fire °C|
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|
|d4||Elongation after rupture|
|d||Elongation after rupture|
|d10||Elongation after rupture|
|y||The relative narrowing|
|HB||Brinell hardness number|
|Weldability||To improve the overall corrosion resistance of welded assemblies and relieve residual stresses applied on the hardened air from 950-1050 °C (aged for at least 2.5 minutes/mm of maximum wall thickness, but not less than 1 hour).|
|Macrostructure and pollution||Macrostructure of steel when testing for treated templeto should not have shrinkage, porosity, bubbles, captivity, cracks, fistulas, delaminations, and inclusions, podsadecki segregation and exudation of the square. The defects allowed in scores on scales GOST 10243 must not exceed: a). for metal open arc smelting in the Central porosity, point heterogeneity, and 2 points for each parameter; b). for of metal of electroslag remelting: Central porosity 1 point, point heterogeneity - 2 points;). Pousada segregation and exudation square are not allowed.|
|Microstructure||On demand of the consumer steel is carried out in the control of the α-phase, the amount of which in the steel should not exceed 20%. The number of orders control of the α-phase should not exceed 80% of the total annual supply for THAT 14-1-2476-78.|
|Particularities of production of goods||Plates on the other 14-1-1337-75 comes in heat-treated according to the recommended regime: Quenching in water or air with 1020-1050 NN the fire °C. Mechanical properties of steel thicker than 20 mm are not controlled. Bars hot rolled and forged on the other 14-1-915-74 are supplied without heat treatment.|
|Features of heat treatment||Steel products to eliminate the tendency to intergranular corrosion are subjected to hardening regime: heating to 1020-1050 NN the fire °C, exposure during heating for quenching for products with wall thickness up to 10 mm - 30 min, over 10 mm — 20 min + 1 min per 1 mm max thickness cooling in water. Products austenite-ferritic steels do not require heat treatment after welding.|