Copper M0b
Designation
| Name |
The value |
| Designation GOST Cyrillic |
М0б |
| Designation GOST Latin |
M0b |
| Transliteration |
M0b |
| The chemical elements |
Cu0б |
Description
Copper M0b is used: for the manufacture of drawn, cold-rolled and moulded tubes of circular cross section designed for use in electronics; drawn tubes of rectangular and square section, intended for the manufacture of the conductors of the windings of stators of electrical machines with liquid cooling; current conductors and alloys of high purity; instruments of vacuum industry; foil bimetal 999,9 MS+M0b+999,9 MS.
Note
Copper M0b is obtained by melting of cathodes in a reducing or inertance atmosphere or vacuum.
Standards
| Name |
Code |
Standards |
| Bars |
В55 |
GOST 10988-75, OST 4.021.018-92 |
| Pipes from non-ferrous metals and alloys |
В64 |
GOST 15040-77, GOST 16774-78, TU 48-21-366-74 |
| Sheets and stripes |
В53 |
GOST 15471-77, TU 48-21-557-84 |
| Non-ferrous metals, including rare metals, and their alloys |
В51 |
GOST 193-79, GOST 859-2001, OST 4.021.009-92 |
| Sectional and shaped rolling |
В52 |
TU 48-21-498-75 |
| Tapes |
В54 |
TU 48-21-854-88, TU 48-1-787-89 |
Chemical composition
| Standard |
S |
P |
Ni |
Fe |
Cu |
As |
Zn |
Sn |
Sb |
Pb |
Bi |
O |
| GOST 859-2001 |
≤0.003 |
≤0.002 |
≤0.002 |
≤0.004 |
The rest |
≤0.002 |
≤0.003 |
≤0.002 |
≤0.002 |
≤0.003 |
≤0.001 |
≤0.001 |
Cu is the basis.
According to GOST 859-2001, the total mass fraction of copper and silver is ≥ 99.97%. Upon agreement of the manufacturer with the consumer, the manufacture of copper grade M0b with a mass fraction of oxygen not exceeding 0.0020% is allowed.
In the strips and tapes manufactured in accordance with GOST 15471-77, the silicon content should not be more than 0.003%.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
d10 |
Brinell hardness number, MPa |
| Tape supplied on the other 48-21-854-88 (samples) |
| 0.2-3.53 |
- |
- |
≥36 |
- |
- |
| ≤2.5 |
- |
≥310 |
- |
- |
- |
| 2.5-3.53 |
- |
≥284 |
- |
- |
- |
| Copper in the state of delivery |
|
90-150 |
200-250 |
≥60 |
- |
≤45 |
|
300-450 |
400-490 |
≥6 |
- |
- |
| Drawn pipes of square and rectangular cross-section as supplied by GOST 16774-78 |
|
- |
≥200 |
- |
≥35 |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| d10 |
Elongation after rupture |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
R, НОм · м |
С, Дж/(кг · °С) |
| 20 |
128 |
8940 |
387 |
1724 |
390 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
