GOST 493-79
GOST 493−79 of Bronze without tin foundry. Brand
GOST 493−79
Group W51
INTERSTATE STANDARD
BRONZE WITHOUT TIN FOUNDRY
Brand
Tinless bronzes foundry.
Grades
ISS 77.120.30
GST 17 3610
Date of introduction 1980−01−01
Promulgated by the decree of the USSR State Committee on standards of 26 April 1979 N 1554
REPLACE GOST 493−54
REISSUE
1. This standard applies to bronze without tin foundry for the manufacture of castings.
The standard fully complies with the recommendations of the CMEA standardization 1586−75 RS.
2. Brand and chemical composition of the tin bronzes should meet the requirements specified in the table.
| Grade |
Chemical composition, % | ||||||||||||||||||||
| The main component |
Impurity, not more than | ||||||||||||||||||||
| Aluminium |
Iron | Manganese | Nickel | Lead | Phosphorus | Zinc | Sur — mA | Copper | We slack | Sur — mA | Tin | Cream — tions | Aluminium | Nickel | Lead | Phosphorus | Iron | Zinc | Manganese | Just | |
| Bra9mc2l |
8,0−9,5 |
- | 1,5−2,5 |
- | - | - | - | - | OST. |
0,05 |
0,05 |
0,2 |
0,2 |
- | 1,0 |
0,1 |
0,1 |
1,0 |
1,5 |
- |
2,8 |
| Bra10mc2l |
9,6−11,0 |
- | 1,5−2,5 |
- | - | - | - |
- |
OST. |
0,05 |
0,05 |
0,2 |
0,2 |
- | 1,0 |
0,1 |
0,1 |
1,0 |
1,5 |
- |
2,8 |
| Bra9zh3l | 8,0−10,5 | 2,0−4,0 |
- | - | - | - | - | - | OST. | 0,05 |
0,05 |
0,2 |
0,2 |
- | 1,0 |
0,1 |
0,1 |
- |
1,0 |
0,5 |
2,7 |
| Bra10zh3mc2 |
9,0−11,0 |
2,0−4,0 |
1,0−3,0 | - | - | - | - | - | OST. |
0,01 |
0,05 |
0,1 |
0,1 |
- | 0,5 |
0,3 |
0,01 |
- |
0,5 |
- |
1,0 |
| Bra10zh4n4l |
9,5−11,0 |
3,5−5,5 | - |
3,5−5,5 | - | - | - | - | OST. |
0,05 |
0,05 |
0,2 |
0,2 |
- | - | 0,05 |
0,1 |
- |
0,5 |
0,5 |
1,5 |
| Bra11zh6n6 |
10,5−11,5 |
5,0−6,5 | - |
5,0−6,5 | - | - | - | - | OST. |
0,05 |
0,05 |
0,2 |
0,2 |
- | - | 0,05 |
0,1 |
- |
0,6 |
0,5 |
1,5 |
| Bra9zh4n4mc1 |
8,8−10,0 |
4,0−5,0 | 0,5−1,2 | 4,0−5,0 | - | - | - | - | OST. |
0,05 |
0,05 |
0,2 |
0,2 |
- | - | 0,05 |
0,03 |
- |
1,0 |
- |
1,2 |
| Brs30 |
- |
- |
- |
- |
27,0−31,0 |
- | - | - | OST. |
0,1 |
0,3 |
0,1 |
0,02 |
- | 0,5 |
- |
0,1 |
0,25 |
0,1 |
- |
0,9 |
| Bra7mc15zh3n2c2 |
6,6−7,5 | 2,5−3,5 | 14,0−15,5 |
1,5−2,5 | - |
- |
1,5−2,5 | - |
OST. |
0,05 |
0,05 |
0,1 |
0,1 |
- | - |
0,05 |
0,02 |
- |
- |
Carbon 0,05 |
0,5 |
| Brsu3n3c3s20f |
- |
- |
- |
For 3.0−4.0 |
18,0−22,0 | 0,15−0,30 | For 3.0−4.0 | For 3.0−4.0 | OST. |
0,1 |
Bismuth 0,025 |
0,5 |
0,02 |
0,02 |
- |
- |
- |
0,3 |
- |
- |
0,9 |
Notes:
1. Impurities that are not regulated by this standard are included in the total amount of impurities.
2. On demand of the consumer in bronze brand Brsu3n3c3s20f allowed mass fraction of antimony 3,4−4,5%, Nickel 4.5 to 6.0% and phosphorus 0,25−0,4%.
3. Mechanical properties of thermally not processed bronzes and their applicability is given in Appendix 1.
4. The chemical composition of the bronze is determined according to GOST 15027.1−77-GOST 15027.14−77.
5. Tensile strength and elongation after rupture determined in accordance with normative-technical documentation.
6. The tensile test is carried out in accordance with GOST 1497−84.
7. Brinell hardness number is determined in accordance with GOST 9012−59.
8. Compliance marks without tin bronzes of this standard and GOST 493−54 is given in Appendix 2.
ANNEX 1
Reference
Mechanical properties and applicability without tin bronzes
| Mark |
Method of casting | Temporary resistance |
Elongation after rupture |
Hardness Brinell hardness HB, MPa (kgs/mm |
Applicability |
| Not less than |
|||||
| Bra9mc2l |
to |
392 (40) |
20 |
784 (80) |
Antifriction parts, parts of valves employed in fresh water, liquid fuel, and a couple at temperatures up to 250 °C |
| p |
392 (40) |
20 |
784 (80) |
||
| Bra10mc2l |
to |
490 (50) |
12 |
1078 (110) |
|
| p |
490 (50) |
12 |
1078 (110) |
||
| Bra9zh3l |
to |
490 (50) |
12 |
980 (100) |
Valves, anti-friction parts |
| p |
392 (40) |
10 |
980 (100) |
||
| Bra10zh3mc2 |
to |
490 (50) |
12 |
1176 (120) |
|
| p |
392 (40) |
10 |
980 (100) |
||
| Bra10zh4n4l |
to |
587 (60) |
6 |
1666 (170) |
The details of the chemical and food industries, as well as parts, operating at elevated temperatures |
| p |
587 (60) |
5 |
1568 (160) |
||
| Bra11zh6n6 |
to |
587 (60) |
2 |
2450 (250) |
Valves, anti-friction parts |
| p |
587 (60) |
2 |
2450 (250) |
||
| Bra9zh4n4mc1 |
to |
587 (60) |
12 |
1568 (160) |
Valves for sea water |
| p |
587 (60) |
12 |
1568 (160) |
||
| Brs30 |
to |
58,7 (6) |
4 |
245 (25) |
Antifriction parts |
| Brsu3n3c3s20f |
to |
157 (16) |
2 |
637 (65) |
Antifriction parts |
| Bra7mc15zh3n2c2 |
p |
607 (62) |
18 |
- |
|
Notes:
1. The symbol of the casting method:
K — chill casting; n — sand casting.
2. In mark Bra9zh3l during die casting, permitted elongation of at least 6%, if the hardness exceeds HB 1568 MPa (160 kgf/cm).
ANNEX 2 (informative)
ANNEX 2
Reference
| Brand of bronze according to this standard |
Brand of bronze according to GOST 493−54 in part foundry bronze |
| Bra9mc2l |
Bramc9−2L |
| Bra10mc2l |
Bramc10−2 |
| Bra9zh3l |
Brazh9−4L |
| Bra10zh3mc2 |
Brazhmc10−3-1,5 |
| Bra10zh4n4l |
Brazhn10−4-4L |
| Bra11zh6n6 |
БрАЖН11−6-6 |
| Bra9zh4n4mc1 |
- |
| Brs30 |
Brs30 |
| Brsu3n3c3s20f |
- |
| Bra7mc15zh3n2c2 |
- |
