The MA5 alloy

Designation

Name	The value
Designation GOST Cyrillic	МА5
Designation GOST Latin	MA5
Transliteration	MA5
By chemical elements	CuAl5

Description

The MA5 alloy used: for the manufacture of semi-finished products (sheets, plates, bars, rods, profiles, strips, tubes, wire, stampings and forgings) by hot deformation, as well as ingots and slabs intended for the production of all relevant components with maximum operating temperatures up to +150 °C — long, up to +200 °C — short-term.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 14957-76
Bars	В55	GOST 18351-73

Chemical composition

Standard	Mn	Si	Ni	Fe	Cu	Al	Zn	Mg	Be
GOST 14957-76	0.15-0.5	≤0.1	≤0.005	≤0.05	≤0.05	7.8-9.2	0.2-0.8	Rest	≤0.002

Mg is the basis.
According to GOST 14957-76 the mass fraction of other impurities is ≤ 0.30%. "Other impurities" include impurities whose permissible content limits are not indicated (≤), as well as impurities not included in the table, the content of which is not determined. Beryllium is not determined, but is introduced by calculation.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d
Bars and rods, hot-pressed in the state of delivery according to GOST 18351-73. Without heat treatment (MA5) or hardened (МА5Т4) (longitudinal samples)
100-160	≥175	≥275	≥5
160-200	-	≥265	≥4
5-100	≥185	≥295	≥6

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d	Elongation after rupture

Physical characteristics

Temperature	Е, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m
20	42	1800	753	130

A description of the physical symbols

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