Brass L68

Designation

Name The value
Designation GOST Cyrillic Л68
Designation GOST Latin L68
Transliteration L68
By chemical elements Л68

Description

Brass L68 is used: for the manufacture of semi-finished products (strips, sheets, strips, tubes, wire); the various parts by means of deformation in the cold state (cold heading and deep drawing); round drawn thin-walled tubes; drawn and cold-rolled pipes used in heat exchangers; wire screens; radiator strips.

Note

Simple (double) brass.

Standards

Name Code Standards
Tape В54 GOST 1018-77, GOST 15527-2004, GOST 2208-2007, TU 48-0813-40-90, TU 48-21-246-82, TU 48-21-725-85, TU 48-21-656-85, TU 48-21-5005-90
Wire from nonferrous metals and their alloys В74 GOST 1066-90, GOST 1066-2015, TU 48-21-5027-73, TU 48-21-5061-73
Non-ferrous metals, including rare, and their alloys В51 GOST 28873-90
Tubes of non-ferrous metals and alloys В64 GOST 494-90, GOST 11383-75, GOST 21646-2003, GOST 494-2014, TU 48-0813-20-86, TU 48-21-869-89
Sheets and strips В53 GOST 931-90, GOST 5362-78, TU 48-21-5031-91

Chemical composition

Standard S P Fe Cu As Zn Sb Pb Bi
GOST 5362-78 ≤0.002 ≤0.005 ≤0.07 67-70 ≤0.005 Rest ≤0.002 ≤0.03 ≤0.002
GOST 2208-2007 - ≤0.01 ≤0.1 67-70 - Rest ≤0.005 ≤0.03 ≤0.002
Cu is the basis.
According to GOST 5362-78, the total mass fraction of normalized impurities should be ≤ 0.20%.
According to GOST 15527-2004, GOST 2208-2007 the amount of other elements should be ≤ 0.30%. In brass, the mass fraction of nickel is allowed up to 0.30% due to the mass fraction of copper, which is not taken into account in the sum of other impurities. For antimagnetic brass, the mass fraction of iron should not exceed 0.030%. In the brass intended for the manufacture of special-purpose products, the mass fraction of the elements should not be more: iron - 0.070%, antimony 0.002%, phosphorus 0.005%, arsenic 0.005%, sulfur 0.002%; the sum of other elements ≤ 0.20%.

Mechanical properties

Section, mm σU, MPa d d10 HB, MPa HV, MPa
The tape is supplied according to GOST 1018-77 (samples)
0.45-0.9 ≥290 ≥42 - - -
1-1.5 ≥320 ≥42 - - -
Sheets and strip, cold-rolled in the state of delivery according to GOST 931-90, sheets and strips GOST 2208-2007 (samples)
- 290-370 - ≥42 ≥70 ≥75
- ≥520 - - ≥155 ≥160
- 340-470 - ≥20 ≥105 ≥110
- 430-540 - ≥10 ≥125 ≥130
Cold rolled strips in soft (annealed) delivery condition according to GOST 5362-78
290-340 - ≥50 - -
Pipe drawn and cold rolled according to GOST 21646-2003, GOST 494-90 in the state of delivery(samples)
- ≥290 - ≥40 - -
- ≥340 - ≥35 - -

Description mechanical marks

Name Description
σU Limit short-term strength
d Elongation after rupture
d10 Elongation after rupture
HB Brinell hardness number
HV The Vickers hardness

Physical characteristics

Temperature Е, HPa r, kg/m3 l, W/(m · °C) R, Mr. · m
20 112 8600 113 72

A description of the physical symbols

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