Alloy 77NMD (ЭП264)

Designation

Name	The value
Designation GOST Cyrillic	77НМД
Designation GOST Latin	77HMD
Transliteration	77NMD
By chemical elements	77NiCuД

Name	The value
Designation GOST Cyrillic	ЭП264
Designation GOST Latin	EP264
Transliteration	EhP264
By chemical elements	-

Description

Alloy 77NMD used: for the manufacture of small cores of transformers, chokes and relays, working in weak magnetic fields, screens. Small thickness (0,05- 0,02 mm) — for the cores of pulse transformers, magnetic amplifiers and contactless relays.

Note

Alloy with high magnetic permeability in weak fields at saturation induction of 0.65−0.75 T. the Alloy after heat treatment with slow cooling from 600 °C is characterized by a slight change of properties in the climatic temperature range.

Standards

Name	Code	Standards
Classification, nomenclature and General rules	В30	GOST 10160-75, GOST 10994-74
Tape	В34	TU 14-1-1306-75, TU 14-1-1708-76
Bars and shapes	В32	TU 14-11-245-88

Chemical composition

Standard	C	S	P	Mn	Si	Ni	Fe	Cu	Mo
GOST 10994-74	≤0.03	≤0.01	≤0.02	≤1.4	0.1-0.3	75.5-78	Rest	4.8-6	3.9-4.5

Ni is the basis.
According to TU 14-1-1708-76 the chemical composition for the alloy of grade 77NMD-VI is given.

Physical characteristics

Temperature	r, kg/m³
20	8600

A description of the physical symbols

Name	Description
r	Density

Technological properties

Name	The value
Particularities of production of goods	Tape on the other 14-1-1708-76 supplied in cold-worked condition without heat treatment.