Alloy Mnmc40−1,5 is used: for the manufacture of wire strip designed for electrical use and manufacture of countervailing wires; cold-rolled tapes, used in industry as a material of high electrical resistance designed for operation at temperatures above +500 °C.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 28873-90, GOST 492-2006
Tape	В54	GOST 5189-75, TU 48-21-213-88
Wire from nonferrous metals and their alloys	В74	OST 4Г 0.022.006-72, OST 88.0.022.204-74, TU 48-21-186-72

Chemical composition

Standard	C	S	P	Mn	Si	Fe	Cu	As	Sb	Pb	Bi	Mg	Ni+Co
GOST 492-2006	≤0.1	≤0.02	≤0.005	1-2	≤0.1	≤0.5	Rest	≤0.01	≤0.002	≤0.005	≤0.002	≤0.05	39-41

Cu is the basis.
According to GOST 492-2006, the total mass fraction of impurities is ≤ 0.90%. In the constant MNMc40-1.5, used in electronic engineering, the content of the mass fraction of zinc should be ≤ 0.030%.

Mechanical properties

Section, mm	σ_U, MPa	d	HB, MPa
Of cold-rolled tape in the delivery state according to GOST 5189-75
	390-590	-	-
	≥640	-	-
Wire in the delivery state
	380-480	25-30	75-90
	620-720	2-3	≥155

Description mechanical marks

Name	Description
σ_U	Limit short-term strength
d	Elongation after rupture
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m
20	166	8900	21	450-510

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
l	Coefficient of thermal conductivity
С	Specific heat

Alloy Mnmc40-1.5 (Constantan)

Designation

Description