Brass LS74-3

Designation

Name The value
Designation GOST Cyrillic ЛС74-3
Designation GOST Latin LC74-3
Transliteration LS74-3
By chemical elements ЛPb74-3

Description

Brass LS74−3 is used: for the manufacture of semi-finished products (strips, bands, bars); watch parts; bushings.

Note

Lead brass.

Standards

Name Code Standards
Tape В54 GOST 15527-2004
Sheets and strips В53 TU 48-21-216-91

Chemical composition

Standard P Fe Cu Zn Sb Pb Bi
GOST 15527-2004 ≤0.01 ≤0.1 72-75 Rest ≤0.005 2.4-3 ≤0.002
Cu is the basis.
According to GOST 15527-2004 the sum of other elements should be ≤ 0,25%. In brass, the mass fraction of nickel is allowed up to 0.50% due to the mass fraction of copper, which is not taken into account in the sum of other impurities.

Mechanical properties

σU, MPa d5, % HB, MPa
Brass supplied
300-400 40-55 -
600-700 2-5 130-140

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
HB Brinell hardness number

Physical characteristics

Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m
20 105 8700 1214 68

A description of the physical symbols

Name Description
l Coefficient of thermal conductivity
R UD. the resistivity