Brass LO70-1

Designation

Name The value
Designation GOST Cyrillic ЛО70-1
Designation GOST Latin LO70-1
Transliteration LO70-1
By chemical elements ЛSn70-1

Description

Brass LO70−1 is used: for the manufacture of semi-finished products (rods, tubes, sheets, strips); details of instrumentation; drawn and cold-rolled pipes used in heat exchangers; condensers and heat exchangers; products of high corrosion and erosion resistance.

Note

Complex alloyed brass.
According to GOST 28873−90 brass LO70−1 not recommended for use with 01.01.1992 g. in the newly created and upgraded technology. Instead, it is recommended to use a brand LA77−2U.

Standards

Name Code Standards
Tape В54 GOST 15527-2004
Tubes of non-ferrous metals and alloys В64 GOST 21646-2003
Non-ferrous metals, including rare, and their alloys В51 GOST 28873-90

Chemical composition

Standard P Fe Cu Zn Sn Sb Pb Bi
GOST 15527-2004 ≤0.01 ≤0.07 69-71 Rest 1-1.5 ≤0.005 ≤0.07 ≤0.002
Cu is the basis.
According to GOST 15527-2004 the sum of other elements should be ≤ 0.30%. 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 d10
Tubes round, drawn and cold-rolled steel in the delivery state according to GOST 21646-2003 (samples)
≥320 ≥45
≥360 ≥40

Description mechanical marks

Name Description
σU Limit short-term strength
d10 Elongation after rupture

Physical characteristics

Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m
20 105 8600 117 72

A description of the physical symbols

Name Description
l Coefficient of thermal conductivity