Bronze Brof4-0,25

Designation

Name The value
Designation GOST Cyrillic БрОФ4-0,25
Designation GOST Latin BpOF4-0,25
Transliteration BrOF4-025
By chemical elements BaSnP4-0,25

Description

Bronze Brof4−0,25 is used: for the manufacture of semi-finished tapes and tubes used in vehicle building and instrumentation; oval, round and flat-oval drawn tubes for the manufacture of the pressure springs.

Standards

Name Code Standards
Tubes of non-ferrous metals and alloys В64 GOST 2622-75
Non-ferrous metals, including rare, and their alloys В51 GOST 28873-90, GOST 5017-2006
Tape В54 TU 48-21-174-72

Chemical composition

Standard S P Si Ni Fe Cu Al Zn Sn Sb Pb Bi Mg
GOST 5017-2006 ≤0.007 0.2-0.3 ≤0.002 ≤0.2 ≤0.02 Rest ≤0.002 ≤0.3 3.5-4 ≤0.002 ≤0.02 ≤0.002 ≤0.007
Cu is the basis.
According to GOST 5017-2006, the total content of other impurities (not specified in the chemical composition) should be ≤ 0.10%.

Mechanical properties

Section, mm σU, MPa d10
Pipe drawn (round, oval, flat-sided oval) in the delivery state according to GOST 2622-75
≥490 ≥3
≥340 ≥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
20 100 8900 84 90

A description of the physical symbols

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