Alloy 47NKH (ЭИ563)

Designation

Name The value
Designation GOST Cyrillic 47НХ
Designation GOST Latin 47HX
Transliteration 47NH
By chemical elements 47NiCr
Name The value
Designation GOST Cyrillic ЭИ563
Designation GOST Latin EI563
Transliteration EhI563
By chemical elements -

Description

Alloy 47NKH used: for the manufacture of pipes; a vacuum-tight junctions with thermometric glass brands 16Ш, С72−4, etc.

Note

Alloy with an average value of CTE.
Alloy with a CTE (8,0−9,0)·10-6 deg-1 in the temperature range from -70 to + 450 °C.

Standards

Name Code Standards
Classification, nomenclature and General rules В30 GOST 10994-74
Tape В34 GOST 14080-78
Wire, steel, alloy В73 GOST 14081-78
Bars and shapes В32 GOST 14082-78, TU 14-11-245-88
Blanks. Of the workpiece. Slabs В31 TU 14-1-3719-84, TU 14-1-3904-84

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu
GOST 10994-74 ≤0.05 ≤0.015 ≤0.015 0.3-0.6 0.7-1 ≤0.3 46-47 Rest ≤0.2
Fe is the basis.

Mechanical properties

Section, mm d5, %
Cold-rolled steel strip according to GOST 14080-78 on delivery
0.1-2.5 ≤930

Description mechanical marks

Name Description
d5 Elongation after rupture

Physical characteristics

Temperature r, kg/m3 a, 10-6 1/°C
20 8200 -
100 - 86
200 - 84
300 - 83
400 - 81
500 - 92
600 - 100
700 - 111
800 - 119

A description of the physical symbols

Name Description
Е The normal elasticity modulus
R UD. the resistivity

Technological properties

Name The value
Macrostructure and pollution The macrostructure of billets on the other 14-1-3719-84 should not have shrinkage porosity, bubbles, cracks, delamination, visible without using the magnifying devices. The defects allowed must not exceed: - for a point heterogeneity - 2 points; - for Central porosity - 2 points; - phase separation in the square - 2 points.
The temperature of the inflection point ≥400 °C
Temperature coefficient of linear expansion The billet according to TU 14-1-3719-84 to determine the CTE is subjected to heat treatment regime: Quenching in VDU from 810±10 °C to + Leave samples at 350±10 °C (aging for 1 h), cooling with the furnace or container. ACP CTE, 10-6 1/°C in the temperature range shall be: - 20÷300 °C - 7,2-8,1; - 20÷400 °With - 7,1-8,2; - 20÷450 °With - 7,8-8,7; - 20÷500 °With and 8.5 and 9.4. The definition of CTE is made in accordance with GOST 14080.