Alloy 47N3KH

Designation

Name The value
Designation GOST Cyrillic 47Н3Х
Designation GOST Latin 47H3X
Transliteration 47N3H
By chemical elements 47Ni3Cr

Description

Alloy 47N3KH used: for vacuum-tight joints with thin films of soft glass of the type «Lenses».

Note

Alloy with an average value of CTE.
Alloy with a CTE (9,5−10,5)·10-6 deg-1 in the temperature range from -70 to + 400 °C.
Alloy brand 47НЗХ not allowed to use in the newly created and upgraded technology with 01.01.91.

Standards

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

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 3-4 ≤0.3 46-48 Rest ≤0.2
Fe is the basis.

Physical characteristics

Temperature r, kg/m3 a, 10-6 1/°C
20 8200 -
-100 - 88
-80 - 88
-60 - 87
-40 - 87
-20 - 85
100 - 81
200 - 82
300 - 80
400 - 83
500 - 96
600 - 118
700 - 123
800 - 131

A description of the physical symbols

Name Description
r Density
a The coefficient of linear expansion

Technological properties

Name The value
The temperature of the inflection point ≥390 °C