Alloy 67Н26М (ЭИ639; NIMO-25)

Designation

Name The value
Designation GOST Cyrillic 67Н26М
Designation GOST Latin 67H26M
Transliteration 67N26M
By chemical elements 67Ni26Cu
Name The value
Designation GOST Cyrillic ЭИ639
Designation GOST Latin EI639
Transliteration EhI639
By chemical elements -
Name The value
Designation GOST Cyrillic НИМО-25
Designation GOST Latin HIMO-25
Transliteration NIMO-25
By chemical elements NiYSn-25

Description

Alloy 67Н26М used: for the production of hot-rolled bars (10−25 mm) and forged rods (26−100 mm) and micron-sized wire (0,03−0,2 mm), used for the manufacture of parts of vacuum devices and for welding of parts made of alloys nikolkaiyevich Н70М27 (ЭП495) and Н70М27Ф (ЭП490).

Standards

Name Code Standards
Wire, steel, alloy В73 TU 14-1-1144-74, TU 14-1-383-72
Bars and shapes В32 TU 14-1-832-73

Chemical composition

Standard C S P Mn Si Ni Fe Mo
TU 14-1-832-73 ≤0.035 ≤0.02 ≤0.02 ≤0.5 ≤0.25 66-69 Rest 25-28
Ni is the basis.

Technological properties

Name The value
Macrostructure and pollution The macrostructure of the alloy bars on THAT 14-1-832-73 should be tight with no traces of shrinkage, voids, cracks, slag and nonmetallic inclusions that are visible without using the magnifying devices.
Particularities of production of goods Bars hot rolled and forged on the other 14-1-832-73 are supplied without heat treatment.
Features of heat treatment On the other 14-1-832-73 mechanical properties of hot rolled and forged bars (σВ, δ) and specific resistivity (ρ) are determined at room temperature on samples annealed by mode Quenching in water 1050-1100 °C. the testing Results of mechanical properties and electrical-resistivity recorded in the certificate.