Alloy 47ND (47ND-VI)

Designation

Name The value
Designation GOST Cyrillic 47НД
Designation GOST Latin 47HD
Transliteration 47ND
By chemical elements 47NiД
Name The value
Designation GOST Cyrillic 47НД-ВИ
Designation GOST Latin 47HD-BI
Transliteration 47ND-VI
By chemical elements 47NiД-ВIr

Description

Alloy 47ND applies: for soldering with soft glass brands С93−4, С93−2, С95−2, С94- 1, C90−1, C90−2, etc.; to connect with ceramics and mica, for springs of hermetic contacts.

Note

Alloy with an average value of CTE.
Alloy with a CTE (9,0−11,0)·10-6 deg-1 in the temperature range from -70 to + 440 °C With high permeability and saturation induction of 1.4 T.

Standards

Name Code Standards
Classification, nomenclature and General rules В30 GOST 10994-74
Tape В34 GOST 14080-78, TU 14-1-4312-87
Wire, steel, alloy В73 GOST 14081-78
Bars and shapes В32 GOST 14082-78, TU 14-11-245-88
Sheets and strips В33 TU 14-1-3727-84
Blanks. Of the workpiece. Slabs В31 TU 14-1-3904-84

Chemical composition

Standard C S P Mn Si Ni Fe Cu
GOST 10994-74 ≤0.05 ≤0.015 ≤0.015 ≤0.4 ≤0.3 46-48 Rest 4.5-5.5
Fe is the basis.

Mechanical properties

Section, mm σU, MPa d4
Cold-rolled strips of alloy 47ND brands; 47ND-VI according to GOST 14080-78 on delivery
0.3-2.5 490-610 ≥23
0.02-2.5 ≤930 -

Description mechanical marks

Name Description
σU Limit short-term strength
d4 Elongation after rupture

Physical characteristics

Temperature r, kg/m3 a, 10-6 1/°C
20 8200 -
-100 - 109
-80 - 109
-60 - 108
-40 - 106
-20 - 105
100 - 102
200 - 99
300 - 98
400 - 99
500 - 104
600 - 114
700 - 122
800 - 129

A description of the physical symbols

Name Description
Е The normal elasticity modulus
l Coefficient of thermal conductivity
a The coefficient of linear expansion

Technological properties

Name The value
The temperature of the inflection point ≥420 °C