Alloy KHN45JU (ЭП747)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН45Ю |
| Designation GOST Latin |
XH45Ju |
| Transliteration |
HN45Yu |
| The chemical elements |
CrNi45Al |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП747 |
| Designation GOST Latin |
EP747 |
| Transliteration |
EhP747 |
| The 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 |
| Sheets and stripes |
В33 |
GOST 24982-81, TU 14-1-2601-79, TU 14-1-2602-79 |
| Classification, nomenclature and general norms |
В30 |
GOST 5632-72 |
| Bulls. Blanks. Slabs |
В31 |
OST 3-1686-90, TU 14-1-1214-75, TU 14-1-4082-86 |
| Tapes |
В34 |
TU 14-1-2075-87 |
| Sectional and shaped rolling |
В32 |
TU 14-1-941-74, TU 14-11-245-88 |
| Pipes steel and connecting parts 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 |
| TU 14-3-1371-86 |
≤0.1 |
≤0.02 |
≤0.025 |
≤1 |
15-17 |
≤1 |
44-46 |
The rest |
- |
2.9-3.9 |
- |
- |
≤0.03 |
≤0.1 |
| GOST 5632-72 |
≤0.1 |
≤0.02 |
≤0.025 |
≤1 |
15-17 |
≤1 |
44-46 |
The 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 characteristics
| Section, mm |
sT|s0,2, MPa |
σB, 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 |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
a, 10-6 1/°С |
| 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 |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Macrostructure and contamination |
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. |
