Steel 08KH15N24V4TR (ЭП164)

Designation

Name	The value
Designation GOST Cyrillic	08Х15Н24В4ТР
Designation GOST Latin	08X15H24B4TP
Transliteration	08H15N24V4TR
By chemical elements	08Cr15Н24W4TiB

Name	The value
Designation GOST Cyrillic	ЭП164
Designation GOST Latin	EP164
Transliteration	EhP164
By chemical elements	-

Description

08KH15N24V4TR steel is used: for the manufacture of blades and vanes, fasteners, discs of gas turbines with long life at temperatures of 650−700 °C; blanks, parts and welded Assembly of pipe fittings with the use of heat treatment.

Note

Steel complexly alloyed heat-resistant austenitic class.
The recommended maximum operating temperature for a very long time +700 °C.
The temperature of beginning of intensive scaling in air +900 °C.

Standards

Name	Code	Standards
Classification, nomenclature and General rules	В30	GOST 5632-72
Bars and shapes	В32	GOST 5949-75, TU 14-1-1139-74, TU 14-11-245-88
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90
Processing of metals by pressure. Forgings	В03	ST ЦКБА 010-2004
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	B	Ti	Mo	W	Ce
GOST 5632-72	≤0.08	≤0.02	≤0.035	0.5-1	14-16	≤0.6	22-25	Rest	≤0.3	≤0.2	≤0.005	1.4-1.8	≤0.3	4-5	≤0.03
TU 14-1-1139-74	≤0.08	≤0.02	≤0.035	0.5-1	14-16	≤0.6	22-25	Rest	≤0.3	≤0.2	≤0.005	1.4-1.8	≤0.3	4-5	≤0.03

Fe is the basis.
According to TU 14-1-1139-74, the settlement boron up to 0.020% is allowed at the request of the customer.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Blank pieces of pipe fittings according to ST CKBA 016-2005. Aging at 690-710 °C (16 h exposure)
≤200	≥490	≥735	≥18	≥35	≥784	≥229
Bars on the other 14-1-1139-74. Vacation at 670-730 °C, air cooling. Allowed to leave to subject the workpiece to hardening in air, 1000-1100°C.
-	≥440	≥740	≥18	≥35	≥785	-
Bars hot rolled and forged at STP 26.260.484-2004. Annealing in air 1130-1150 °C + Aging at 700 °C, exposure time 16 h, air cooling
	≥440	≥730	≥18	≥35	-	-
Bars on the other 14-1-1139-74. Vacation at 670-730 °C, air cooling. Allowed to leave to subject the workpiece to hardening in air, 1000-1100°C.
-	≥392	≥590	≥10	≥16	-	-
Rolled steel. Annealing in air 1130-1150 °C (exposure 2 hours) + Aging at 730-750 °C (aging 16 h), air cooling
	≥442	≥736	≥18	≥35	≥784	-
Rolled steel. Vacation at 700°C (aging 16 h), air cooling
	≥490	≥736	≥20	≥30	≥1176	-

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	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C
20	223	8230	122	-
100	215	-	-	145
200	209	-	-	155
300	200	-	-	163
400	191	-	-	168
500	182	-	-	172
650	169	-	-	175
700	165	-	-	178
750	161	-	-	179
800	156	-	-	-
600	-	-	-	174

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	Difficult weldability of the steel.
Features of heat treatment	Steel products 08KH15N24V4TR for equipment chemical industry preferably termoobrabotki regime: hardening with 1130-1150 °C With air cooling and aging at 700 °C duration 16 hours with air cooling.