Steel 45KH14N14V2M (ЭИ69)

Designation

Name	The value
Designation GOST Cyrillic	45Х14Н14В2М
Designation GOST Latin	45X14H14B2M
Transliteration	45H14N14V2M
By chemical elements	45Cr14Н14W2Mo

Name	The value
Designation GOST Cyrillic	ЭИ69
Designation GOST Latin	EI69
Transliteration	EhI69
By chemical elements	-

Description

45KH14N14V2M steel is used: for the production of parts of valves and piping, forgings, valves, motors, diesel engine parts and specialty fasteners to work for a long period of time at temperatures up to +600 °C for limited periods up to +650 °C; nitride parts of aviation.

Note

Steel complexly alloyed heat-resistant austenitic class.
The temperature of beginning of intensive scaling in air +850 °C.

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
Sheets and strips	В33	GOST 4405-75
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, TU 14-1-1671-76, TU 14-1-2972-80, TU 14-1-3092-81, TU 14-1-3957-85, TU 14-11-245-88
Classification, nomenclature and General rules	В20	OST 1 90005-91
Blanks. Of the workpiece. Slabs	В21	OST 1 90176-75
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90
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
TU 14-1-1671-76	0.4-0.5	≤0.02	≤0.03	≤0.7	13-15	≤0.8	13-15	Rest	≤0.3	≤0.2	≤0.2	0.25-0.4	2-2.8
GOST 5632-72	0.4-0.5	≤0.02	≤0.035	≤0.7	13-15	≤0.8	13-15	Rest	≤0.3	≤0.2	≤0.2	0.25-0.4	2-2.8

Fe is the basis.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h)
-	≥375	≥775	≥37	≥49	-	-
Long products (indicated by temperature and duration of heat exposure)
-	≥400	≥840	-	-	-	-
Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91
-	-	-	-	-	-	179-269
Blank pieces of pipe fittings and welded assemblies at ST CKBA 016-2005. Quenching in water from 1170-1200 °C (1090-1110 or °C) (exposure: 0.5-1.0 C) + Aging at 730-770 °C (maintained for 5 h), air cooling
	≥294	≥686	≥20	≥35	≥490	170-270
Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h)
-	≥255	≥570	≥22	≥32	-	-
Long products (indicated by temperature and duration of heat exposure)
-	≥265	≥560	≥23	-	-	-
Bars hot rolled and forged GOST 5949-75, STP 26.260.484-2004. High vacation at 810-830 °C, air cooling
	≥315	≥710	≥20	≥35	-	-
Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h)
-	≥250	≥490	≥16	≥26	-	-
Long products (indicated by temperature and duration of heat exposure)
-	≥260	≥540	≥17	-	-	-
Forming at OST 1 90176-75. Annealing at 810-830 °C (aged for at least 5 hours), air cooling
	≥314	≥706	≥20	≥35	≥490	197-285
Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h)
-	≥235	≥435	≥13	≥25	-	-
Long products (indicated by temperature and duration of heat exposure)
-	≥245	≥410	≥16	-	-	-
Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h)
-	≥215	≥340	≥11	≥22	-	-
Long products (indicated by temperature and duration of heat exposure)
-	≥280	≥405	≥16	≥30	-	-
Bars. Quenching in water from 1175 °C + Ageing at 750 °C (maintained for 5 h)
-	≥195	≥275	≥9	≥18	-	-
Long products (indicated by temperature and duration of heat exposure)
-	≥315	≥550	-	≥19	-	-
-	≥305	≥610	-	≥28	-	-
-	≥400	≥800	≥18	≥37	-	-
-	≥425	≥810	-	≥33	-	-
-	≥260	≥485	≥20	≥46	-	-
-	≥265	≥465	≥19	≥44	-	-
-	≥255	≥390	≥17	≥39	-	-

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)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	208	8000	14	814	-	-
20	208	8000	14	815	-	-
100	196	-	16	875	-	-
200	190	7830	17	945	17	-
300	181	-	19	1000	-	507
400	173	7840	20	1055	17	511
500	166	-	21	1098	-	523
600	157	7760	22	1142	18	523
700	149	-	24	1172	-	-
800	141	7660	-	-	18	528
1000	-	-	-	-	19	-

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. The welding process - SMAW. To relieve welding stresses, the recommended subsequent heat treatment.
The temperature of forging	Start - 1160 °C, the end - 850 °C. the cross Sections up to 300 mm are cooled in stacks on the air.
Machinability	In the hardened state when NV 229-241 Kn TV.SPL.=0,7 Kn b.St.=0,25.
Features of heat treatment	Steel products 45KH14N14V2M you can termoobrabotki in two modes: a) annealing - heating to 1110-1130 °C, exposure when the material thickness up to 15mm - 30 min, more than 15 mm - 30 min + 1 min per 1 mm of maximum thickness; cooling in water or air. Aging at 750 °C, exposure 6 h, air cooling; b) high vacation at 820±10 °C, exposure 6 h, air cooling. The first mode is preferable, since the plastic properties of the obtained products are higher.