Steel 15KH18N12S4TJU (ЭИ654; 2Х18Н12С4ТЮ)

Designation

Name	The value
Designation GOST Cyrillic	15Х18Н12С4ТЮ
Designation GOST Latin	15X18H12C4TJu
Transliteration	15H18N12S4TYu
By chemical elements	15Cr18Н12С4TiAl

Name	The value
Designation GOST Cyrillic	ЭИ654
Designation GOST Latin	EI654
Transliteration	EhI654
By chemical elements	-

Name	The value
Designation GOST Cyrillic	2Х18Н12С4ТЮ
Designation GOST Latin	2X18H12C4TJu
Transliteration	2H18N12S4TYu
By chemical elements	2Cr18Н12С4TiAl

Description

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.

Note

Austenite corrosion resistant steel-ferritic class.

Standards

Name	Code	Standards
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

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	Al	V	Ti	Mo	W
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
TU 14-1-561-73	0.12-0.17	≤0.03	≤0.035	0.5-1	17-19	3.8-4.5	11-13	Rest	≤0.3	-	0.13-0.35	≤0.2	0.4-0.7	≤0.3	≤0.2
TU 14-1-997-74	0.12-0.17	≤0.03	≤0.035	0.5-1	17-19	3.8-4.5	11-13	Rest	≤0.2	-	0.13-0.35	-	0.4-0.7	-	-
TU 14-1-3669-83	0.12-0.17	≤0.03	≤0.035	0.5-1	17-19	3.8-4.5	12-13	Rest	≤0.2	-	0.13-0.35	-	0.4-0.7	-	-

Fe is the basis.
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.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, 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)
≤60	≥372	≥715	≥25	-	-	-	≥40	≥785	155-170
The tape is able to on the other 14-1-1073-74
-	-	≥736	-	≥25	-	-	-	-	-
-	-	834-981	-	≥7	-	-	-	-	-
Nagarebana cold-rolled tape of 0.05-2.00 mm according to GOST 4986-79 on delivery
0.2-2	-	830-1080	-	≥10	-	-	-	-	-
0.2	-	830-1080	-	≥5	-	-	-	-	-
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)
0.2-2	-	≥690	-	≥25	-	-	-	-	-
0.2	-	≥690	-	≥13	-	-	-	-	-
Sheet full hard GOST 5582-75. Quenching in water from 950-1050 °C
≤3.9	≥685	≥880	≥10	-	-	-	-	-	-
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)
-	≥345	≥720	-	-	≥30	-	-	-	-
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
-	≥345	690-930	≥30	-	-	-	-	-	-
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)
-	≥343	715-931	-	-	-	≥30	-	-	-
-	≥588	882-1127	-	-	-	≥10	-	-	-
The casting and the ceramic mold. Quenching in water from 1130-1150 °C
	≥275	≥638	-	-	≥16	-	-	≥275	-
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
Образец 25х25	≥373	≥716	≥25	-	-	-	≥40	≥785/343	-
Bars hot rolled and forged on the other 14-1-915-74. Quenching in water from 950 °C. samples longitudinal KCU/KCU samples transverse
	≥382	≥716	≥25	-	-	-	≥40	≥785/343	-
Bars hot rolled and forged according to GOST 5949-75. Quenching in water from 950-1050 °C
	≥375	≥720	≥25	-	-	-	≥40	≥784	-
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in water from 1020-1050 NN the fire °C
	≥350	≥700	≥30	-	-	-	≥40	≥784	-
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
	≥343	≥687	≥30	-	-	-	-	-	-

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
d₄	Elongation after rupture
d	Elongation after rupture
d₁₀	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Technological properties

Name	The value
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.