Steel 08KH13 (ЭИ496)

Designation

Name	The value
Designation GOST Cyrillic	08Х13
Designation GOST Latin	08X13
Transliteration	08H13
By chemical elements	08Cr13

Name	The value
Designation GOST Cyrillic	ЭИ496
Designation GOST Latin	EI496
Transliteration	EhI496
By chemical elements	-

Description

Steel 08KH13 is used: for the production of blades for steam turbines operating at temperatures up to +580 °C, valves, bolts and pipes, as well as parts with high ductility, load (valves of hydraulic presses, household items); products exposed to slightly aggressive media (precipitation, aqueous solutions of salts of organic acids at room temperature, etc.); as a cladding layer in the manufacture of hot-rolled dual-layer corrosion-resistant sheets.

Note

Corrosion-resistant and heat-resistant ferritic class.
The recommended maximum operating temperature for limited time up to +650 °C. the Temperature of beginning of intensive scaling in air +750 °C.
The greatest corrosion resistance is achieved after heat treatment (quenching and tempering), and polishing. The brand 08X13 steel can also be used after annealing.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Processing of metals by pressure. Forgings	В03	GOST 25054-81, OST 26-01-135-81
Sheets and strips	В33	GOST 4405-75, GOST 5582-75, GOST 7350-77, GOST 10885-85, TU 14-1-3620-83
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 18907-73, GOST 18968-73, GOST 19442-74, TU 14-11-245-88
Steel pipes and fittings to them	В62	GOST 9940-81, GOST 9941-81, TU 14-3-1654-89
Blanks. Of the workpiece. Slabs	В31	OST 108.020.03-82, OST 3-1686-90, TU 14-1-565-84
Thermal and thermochemical treatment of metals	В04	STP 26.260.484-2004, ST ЦКБА 016-2005

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 5632-72	≤0.08	≤0.025	≤0.03	≤0.8	12-14	≤0.8	≤0.6	Rest	≤0.3	≤0.2	≤0.2	≤0.3	≤0.2

Fe is the basis.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
The sheet section 20 mm. Quenching in water from 1000-1020 °C + Vacation at 680-700 °C (exposure 12 h), air cooling. At 20 °C NV=148-156
-	275-350	460-510	25-37	73-80	235-323	-
Sheet. Quenching in oil from 1000-1020 °C Without thermal aging
-	314-353	500-510	29-31	73-75	235-284	-
Hot rolled sheet (of 1.5-3.9 mm) and cold rolled (0,7-3,9 mm) steel according to GOST 5582-75. Annealing or vacation at 740-780 °C
-	-	≥410	≥21	-	-	-
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 with 960-1020 °C + Vacation at 680-780 °C, air cooling
-	≥295	≥420	≥23	-	-	-
The sheet section 20 mm. Quenching in water from 1000-1020 °C + Vacation at 680-700 °C (exposure 12 h), air cooling. At 20 °C NV=148-156
-	275-295	430	28-29	77-79	353	-
Sheet. Vacation at 680-700 °C (extract 12 hours) Heat aging at 450 °C, 5000 h
-	≥310	≥490	≥35	≥74	≥227	-
Hot rolled sheet (4,0-50,0 mm) and cold rolled (4,0-5,0 mm) steel according to GOST 7350-77. Joke mode manufacturer
-	≥250	≤650	≥15	-	-	-
The sheet section 20 mm. Quenching in water from 1000-1020 °C + Vacation at 680-700 °C (exposure 12 h), air cooling. At 20 °C NV=148-156
-	245-275	400-420	27-29	75-78	333-372	-
Forgings. Quenching in oil from 1000-1050 °C + Vacation at 700-800 °C, cooling in oil
1000	≥392	≥539	≥14	≥35	≥490	187-229
The sheet section 20 mm. Quenching in water from 1000-1020 °C + Vacation at 680-700 °C (exposure 12 h), air cooling. At 20 °C NV=148-156
-	235-275	380-400	22-27	73-77	333-363	-
Bars and strip hot rolled and forged GOST 18968-73. Quenching in water from 1000-1050 °C to + Leave in 660-770 °C, air cooling
	≥410	≥580	≥20	≥60	≥981	187-217
The sheet section 20 mm. Quenching in water from 1000-1020 °C + Vacation at 680-700 °C (exposure 12 h), air cooling. At 20 °C NV=148-156
-	215-255	340-470	23-26	71-79	343-363	-
Bars hot rolled and forged according to GOST 5949-75. Quenching in oil 1000-1050 °C + Vacation at 700-800 °C, cooling in oil
	≥410	≥590	≥20	≥60	≥981	-
The sheet section 20 mm. Quenching in water from 1000-1020 °C + Vacation at 680-700 °C (exposure 12 h), air cooling. At 20 °C NV=148-156
-	195-245	310-320	23-30	72-77	323-343	-
Bars hot rolled and forged at STP 26.260.484-2004. Quenching in oil with 980-1000 °C to + Leave at 680-720 °C, cooling in oil
	≥420	≥600	≥19	≥55	≥882	-
The sheet section 20 mm. Quenching in water from 1000-1020 °C + Vacation at 680-700 °C (exposure 12 h), air cooling. At 20 °C NV=148-156
-	185-225	215-285	26-37	73-84	294-323	-
Bars hot rolled and forged at STP 26.260.484-2004. The annealing at 780-850 °C + Cooling with the furnace at a speed of 20-40 °C/h up to 650-700 °C, then air cooling
	≥420	≥600	≥20	≥60	≥980	-
The sheet section 20 mm. Quenching in water from 1000-1020 °C + Vacation at 680-700 °C (exposure 12 h), air cooling. At 20 °C NV=148-156
-	145-165	165-180	34-45	87-89	245-265	-
Seamless hot deformed tubes in the delivery condition according to GOST 9940-81
	-	≥372	≥22	-	-	-
Rod cross-section 20 mm. Annealing
-	≥285	≥480	≥36	≥84	≥295	-
Contoured rods (g/K, x/K and x/t for steam turbine blades; x/a and x/t for coupling blades of steam turbines) according to GOST 19442-74. Quenching in water or oil with 1000-1050 °C to + Leave in 660-770 °C, air cooling (specified strength)
	≥411	≥588	≥20	≥60	≥981	187-217
Rod cross-section 20 mm. Annealing
-	≥210	≥350	≥30	≥82	-	-
-	≥160	≥290	≥40	≥85	-	-
-	≥105	≥170	≥51	≥92	-	-

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
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	G, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	217	85	7760	-	506	-	-
20	217	-	7760	-	506	-	-
200	206	80	7710	28	679	111	-
300	198	77	-	28	769	114	462
400	189	73	-	28	854	118	-
500	180	68	-	27	938	121	-
600	-	62	-	26	1021	123	-
700	-	-	-	26	1103	125	-
800	-	-	-	25	-	125	-
900	-	-	-	27	-	-	-
1000	-	-	-	-	-	128	-

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	Limited weldability. Welding methods: SMAW, submerged arc ADS, ARDS and CCC. Preheating and heat treatment are applied depending on the method of welding, type and purpose of the design.
Склонность к отпускной хрупкости	Inclined at temperatures of 400-500 °C.
The temperature of forging	Beginning - 1220 °C, the end - 850 °C. the cross Sections up to 300 mm are cooled in stacks on the air.
Machinability	In the hardened and tempered condition when NV 149-159 and blower SB=590 MPa Kn TV.SPL.=0,7 Kn b.St.=1,4.
Features of heat treatment	Products made of steel 08X13 subjected to hardening and tempering according to the mode: heating up to 980-1000 °C, maintained for 5 min + 1 min per 1 mm of maximum wall thickness, cooling in oil; leave at 680-720 °C, exposure - 30 min + 1 min per 1 mm of maximum wall thickness, cooling in oil. Weldment of steel 08X13 should be subjected to the annealing at 780-850 °C for 1-2 hours, cooling at a speed of 20-40 °C/h up to 650-700 °C then in air. Not allowed to leave goods at 450 - 550 °C, as this leads to the "475 ° embrittlement".