Alloy KHN45JU (ЭП747)

Designation

Name	The value
Name	The value
Designation GOST Cyrillic	ХН45Ю
Designation GOST Latin	XH45Ju
Transliteration	HN45Yu
By chemical elements	CrNi45Al

Name	The value
Name	The value
Designation GOST Cyrillic	ЭП747
Designation GOST Latin	EP747
Transliteration	EhP747
By chemical elements	-

Description

Alloy KHN45JU used: for the production of commercials slot furnaces; furnace conveyor belts; parts of burners, thermocouple sheaths, sheet, and tubular parts of furnaces and other parts for continuous operation at temperatures of 1250−1300 °C; cold-deformed tubes for the production of thermoelectric thermometers used in blast furnaces and other industries, for use at temperatures up to 1300 °C; tube clips.

Note

Alloy heat-resisting and high-temperature for iron-Nickel basis.
The recommended maximum operating temperature for a long time + 1250−1300 °C.
It is recommended to replace the alloy KHN78T.

Standards

Name	Code	Standards
Name	Code	Standards
Sheets and strips	В33	GOST 24982-81, TU 14-1-2601-79, TU 14-1-2602-79
Classification, nomenclature and General rules	В30	GOST 5632-72
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-1214-75, TU 14-1-4082-86
Tape	В34	TU 14-1-2075-87
Bars and shapes	В32	TU 14-1-941-74, TU 14-11-245-88
Steel pipes and fittings to them	В62	TU 14-3-1371-86

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al	Ti	Mo	Ce	Ba
Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al	Ti	Mo	Ce	Ba
TU 14-3-1371-86	≤0.1	≤0.02	≤0.025	≤1	15-17	≤1	44-46	Rest	-	2.9-3.9	-	-	≤0.03	≤0.1
GOST 5632-72	≤0.1	≤0.02	≤0.025	≤1	15-17	≤1	44-46	Rest	≤0.3	2.9-3.9	≤0.2	≤0.3	≤0.03	≤0.1

Ni is the basis.
According to TU 14-1-941-74, TU 14-1-4082-86 the chemical composition is given for an alloy of grade ХН45Ю (ЭП747). Barium, cerium are introduced into the metal by calculation and chemical analysis is not determined.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %
Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %
Steel cold-rolled sheet (0.8 to 3.9 mm) and HR (2.0 to 11.0 mm) in the delivery state according to GOST 24982-81. Quenching in water, under a water shower or air 1060-1100 °C
0.8-11	-	≥590	≥30	-
Bars hot rolled on the other 14-1-941-74. The longitudinal samples. Annealing in air from 1050-1150 °C
	≥215	≥590	≥15	≥20
Rolled steel. Hardening from 1050-1150 °C
8-10	≥216	≥590	≥15	≥20
Tubular billet on the other 14-1-4082-86. The longitudinal samples. Annealing in air 1130-1180 °C
	-	≥540	≥35	-
Seamless cold-worked tubes heat-treated and etched, as supplied on the other 14-3-1371-86
	-	≥591	≥35	-

Description mechanical marks

Name	Description
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

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C
Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C
20	207	7760	-	-
100	201	-	105	158
200	192	-	122	159
300	187	-	138	1595
400	178	-	154	1655
500	171	-	175	166
600	156	-	192	19
700	-	-	-	197

A description of the physical symbols

Name	Description
Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Name	The value
Macrostructure and pollution	In the macrostructure are not allowed the remnants of shrinkage, Pousada looseness, Pousada heterogeneity, light and dark crusts, foreign metal and non-metallic inclusions, subcortical bubbles, cracks, Sakova, delamination, visible to the naked eye.