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Bronze is an alloy formed from a combination of copper and tin or other metals or elements. However, in the case of this metal, the copper content should always oscillate between 80-90 percent by weight of the alloy. If there is less copper, and it is still an alloy, we may be dealing with brass and cupronickel.
Bronze, which was a copper alloy with a ratio of 90 percent copper to 10 percent tin, was used and produced as far back as antiquity. It was used to make everyday objects or ornaments.
Bronze is very strong and easily worked, including hardening. It is resistant to heat and corrosion and to abrasion. The use of bronze at present is severely limited because it is quite expensive. Bronze in the form of metallurgical products can be in the form of brass sheets, strips, bars, wires, pipes, or in casting form it takes the form of bars or billets.
E-invest offers customers bronze bars, bushings, strips, sheets and flat bars.
| Type | Cross section | Dimensions | Grade |
|---|---|---|---|
| BRONZE BARS |  | from o 16 – o 200 mm | B101, BA1032, BA93, B555 |
 | 2mm-363mm | CuSn7ZnPb, CuSn12, CuSn8, CuAl10Ni5Fe4, CuAl10Fe3Mn2, CuPb15Sn | |
 | from 20 – 50 mm | BA1032 | |
 | 8×8 – 203x203mm | CuSn7ZnPb, CuSn12, CuSn8, CuAl10Ni5Fe4 | |
| PARTICULAR | 8-75mm | CuSn7ZnPb, CuSn12, CuSn8, CuAl10Ni5Fe4, | |
| BRONZE BUSHINGS |  | from o 30 – o 300 mm | B101, BA1032, B476, BK331 |
 | 26×6 – 353×28 | RG7 grades CuSn7ZnPb, CuSn12, CuSn8, CuAl10Ni5Fe4, CuPb15Sn It is possible to cast centrifugal dimension to the indicated size | |
| Type | Thickness | Dimensions | Grade |
| BRONZE BANDS | 0.3 mm | Width: 300 mm | B6 |
| 0,15×290- 1,5×290 | H160 , FB370, R560 | ||
| BRONZE SHEETS | 0,15x300x2000- 15x1000x2000 | CuSn6H160, CuAl10Ni5Fe4 | |
| BRONZE FLAT BARS | 20×3 – 312×62 | CuSn7ZnPb, CuSn12, CuSn8, CuAl10Ni5Fe4 |
TABLE OF CHEMICAL COMPOSITIONS OF CAST BRONZES
| Designation | Mark | Feature | Chemical composition in % | Mech. properties | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Zn | Sn | Pb | Mn | Al | Fe | Si | Ni | P | HB | |||
| Tin bronze | CuSn10 | B10 | – | 9,0÷ 11,0 | – | – | – | – | – | – | – | 70 |
| Tin-phosphor bronze | CuSn10P | B101 | – | 9,0÷ 11,0 | – | – | – | – | – | – | 0,8÷ 1,2 | 90 |
| Tin-zinc bronze | CuSn10Zn3 | B103 | 2,0÷ 4,5 | 9,0÷ 11,0 | – | – | – | – | – | – | – | 80 |
| Tin-lead bronze | CuSn6Zn6Pb3 | B663 | 5,0÷ 7,5 | 2,0÷ 4,0 | – | – | – | – | – | – | – | 60 |
| Tin-lead bronze | CuSn5Zn5 Pb5 | B555 | 4,0÷ 6,5 | 4,0÷ 6,0 | – | – | – | – | – | – | – | 60 |
| Tin-lead bronze | CuSn10Pb10 | B1010 | – | 9,0÷ 11,0 | 9,0÷ 11,0 | – | – | – | – | – | – | 100 |
| Tin-lead bronze | CuSnSPb25 | B525 | – | 4,0÷ 6,0 | 23,0÷ 24 | – | – | – | – | – | – | 55 |
| Lead bronze | CuPb30 | B030 | – | – | 27,0÷ 33 | – | – | – | – | – | – | 25 |
| Aluminum-iron bronze | CuAL9Fe3 | BA93 | – | – | – | – | 8,0÷ 10,0 | 2,0÷ 4,0 | – | – | – | 110 |
| Aluminum-iron-manganese bronze | CuAL10Fe3Mn2 | BA 1032 | – | – | – | 1,0÷ 2,0 | 9,0÷ 11,0 | 2,0÷ 4,0 | – | – | – | 120 |
| Aluminum Iron Nickel Bronze | CuAL10Fe4Ni4 | BA 1044 | – | – | – | – | 9,0÷ 11,0 | 3,5÷ 5,5 | – | 3,5÷ 5,5 | – | 180 |
| Silicon iron bronze | CuSi4Fe2 | BK42 | – | – | – | – | – | 1,0÷ 1,8 | 3,5÷ 4,5 | – | – | 100 |
| Silicon-zinc-manganese bronze | CuSi3Zn3Mn | BK331 | 3,0÷ 5,5 | – | – | 0,5÷ 1,5 | – | 0,5÷ 1,2 | 3,0÷ 4,0 | – | – | 90 |
TABLE OF CHEMICAL COMPOSITIONS OF BRONZES FOR PLASTIC PROCESSING
| Bronze grade | Chemical composition % | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Designation | Mark | Feature | Sn | Zn | Pb | Ni | P | Si | Mn | Al | Fe | Other | |
| Tin bronze | CuSn4 CuSn7 CuSn8 | B4 B7 B8 | 3,5÷ 4,5 6,0÷ 7,0 7,0÷ 9,0 | – – – | – – – | – – – | 0,1÷ 0,3 0,1÷ 0,25 0,1÷ 0,3 | – – – | – – – | – – – | – – – | – – – | |
| Tin-tin bronze | CUSn4Zn3 | B43 | 3,5÷ 4,5 | 2,7÷ 4 | – | – | – | – | – | – | – | – | |
| Tin-zinc-lead bronze | CuSn4Zn4Pb3 CuSn4Zn4Pb4 | B443 B444 | 3,0÷ 5,0 3,0÷ 5,0 | 3,0÷ 5,0 3,0÷ 5,0 | 1,5÷ 3,5 3,0÷ 5,0 | – – | – – | – – | – – | – – | – – | – – | |
| Silicon bronze | CuSi3Mn1 | BK31 | – | – | – | – | – | 2,5÷ 3,5 | 1,0÷ 1,5 | – | – | – | |
| Manganese bronze | CuMn12Ni3 | BM123 | – | – | – | – | – | – | 11,5÷ 13,0 | – | – | 2,5÷ 3,5 % Ni | |
| Aluminum bronze | CuAL5 CuAL7 CuAL10Fe3Mn2 CuAL9Mn2A CuAL9Fe3A CuAL10Fe4Ni4A | BA5 BA7 BA1032 BA92A BA93A BA1044 | – – – – – – | – – – – – – | – – – – – – | – – – – – – | – – – – – – | – – – – – – | – – 1,0÷ 2,0 1,5÷ 2,5 – – | 4,0÷ 6,0 6,0÷ 8,0 9,0÷ 11,0 8,0÷ 10,0 8,0÷ 10,0 9,5÷ 11,0 | – – 2,0÷ 4,0 – 2,0÷ 4,0 3,5÷ 5,5 | – – – – – 3.5÷ 5.5 % Ni | |
| Beryllium bronze | CuBe2Ni CuBe2NiTi | BB2 BB2T | – – | – – | – – | – – | – – | – – | – – | – – | – – | 1,9÷ 2,1 % Be 0.2÷ 0.5 % Ni 1.85÷ 2.1 %Be 0.2÷ 0.4 % (Ni + Co) | |
