Brass LA77-2U

Designation

Name The value
Designation GOST Cyrillic ЛА77-2у
Designation GOST Latin LA77-2u
Transliteration LA77-2u
By chemical elements ЛAl77-2у

Description

Brass LA77−2U is used: for the manufacture of pipes, resistant to marine climate; drawn tubes for heat exchangers.

Note

Complex alloyed brass.

Standards

Name Code Standards
Tape В54 GOST 15527-2004
Tubes of non-ferrous metals and alloys В64 GOST Р 51573-2000, TU 48-21-859-88

Chemical composition

Standard P Mn Si Ni Fe Cu Al Sb Pb Bi
GOST 15527-2004 0.005-0.02 0.03-0.3 0.03-0.2 0.3-1 0.03-0.1 76-79 1.7-2.5 ≤0.005 ≤0.07 ≤0.002
Cu is the basis.
According to GOST R 51573-2000, GOST 15527-2004 the amount of other elements should be ≤ 0.10%. The mass fraction of iron less than 0.030% in brass is not a defective feature.

Mechanical properties

sT|s0,2, MPa σU, MPa d10 HV, MPa
Tube, drawn, 10-50 mm for heat exchangers supplied according to GOST R 51573-2000 (samples)
≥120 ≥390 ≥45 -
≥150 ≥420 ≥38 80-130

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d10 Elongation after rupture
HV The Vickers hardness

Physical characteristics

Temperature r, kg/m3
20 8300

A description of the physical symbols

Name Description
r Density
l Coefficient of thermal conductivity