BrOtsS4-3 sheet, strip, pipe
International Equivalent
| Mark | Analogue | W. Nr. | Aisi Uns | En | Order |
|---|---|---|---|---|---|
| BrOCS4-4-4 | CuSn4Pb4Zn4 | Delivery from the stock, in stock |
Grade: Pressure-treated tin bronze
Industrial applications: for contacts of plugs, current-carrying springs, parts of chemical equipment.
| Chemical properties of BrOCS4-3 alloy | ||
|---|---|---|
| Si | up to 0.002 | |
| Fe | up to 0.05 | |
| P | up to 0.03 | |
| Cu | 92,5 - 93,8 | |
| Al | up to 0.002 | |
| Pb | up to 0.02 | |
| Sb | up to 0.002 | |
| Zn | 2,7 - 3,3 | |
| Sn | 3,5 - 4 | |
| Bi | up to 0.002 | |
| Rolled product | δ5 (%) | (%) Pressure | sT (MPa) | σ in (MPa) | Size | KCU (kJ/m2) | ψ % |
|---|---|---|---|---|---|---|---|
| hard alloy | 3-6 | 500-600 | |||||
| soft alloy | 35-45 | 300-400 |
| Physical characteristics of BrOCC4-3 alloy | ||||||
|---|---|---|---|---|---|---|
| a 10 6 (1/Grad) | E 10- 5 (MPa) | T (Grad) | l (W/(m-grad)) | R 10 9 (Ohm-m) | C (J/(kg-grad)) | r (kg/m3) |
| 1.24 | 20 | 84 | 90 | 8800 | ||
| 18 | 100 | |||||
Tin bronzes and their characteristics.
In the process of alloying copper and tin solid solutions are formed, strongly prone to liquation due to the temperature large crystallization interval. Alloys with tin content over 5% due to liquation have E (a+d) eutectoid component in their structure consisting of hard and soft phases.
The structure of this type is favorable for sliding bearing parts: hard particles create wear resistance, the soft phase provides excellent run-in properties and, therefore, tin bronzes are excellent anti-friction materials.
BrOCC4-3 tin bronze is high antifriction, cold-resistant, insensitive to overheating, non-magnetic, with low volume shrinkage (about 0.8%), thanks to which it is successfully used in artistic castings.
Their main disadvantage is the formation of pores in the castings, which leads to their low tightness. Tin bronzes are alloyed with nickel, lead, zinc and phosphorus.
Characteristics of BrOCS4-3 alloy
| Hot working temperature | 700-800°C | ||
|---|---|---|---|
| Melting temperature | 1045°C | ||
| Annealing temperature | 550 - 650°C | ||
| Designations: | ||||
|---|---|---|---|---|
| - Tensile strength (tensile strength), in MPa | σ in | - relative slump at cracking, in % | å | |
| - elastic limit, in MPa | σ0,05 | - torsional strength limit (ultimate tangential stress), in MPa | Jê | |
| - yield strength, in MPa | σ0,2 | - bending strength limit, in MPa | σd | |
| - relative elongation after rupture, in % | δ5,δ4,δ10 | - endurance limit at symmetrical bending cyclic load, in MPa | σ-1 | |
| - compression (yield strength), in MPa | σcj0,05 and σcj | - torsional symmetrical cyclic load endurance limit, MPa | J-1 | |
| - shear displacement, in % | ν | - number of load cycles | n | |
| - short-term strength limit, in MPa | s in | - electrical resistivity, in Ohm-m | R and ρ | |
| - relative contraction, in % | ψ | - nominal elastic modulus, in GPa | E | |
| - impact toughness for specimens with concentrators according to species V and U, in J/cm2 | KCU and KCV | - Test temperature, °C | T | |
| - yield strength - permanent deformation (limit of proportionality), in MPa | sT | - thermal conductivity coefficient in W/(m- °С) | l and ë | |
| - Brinell hardness | HB | - specific heat capacity in [J/(kg-rad) | C | |
| - Vickers hardness | HV | - specific gravity kg/m3 | pn and r | |
| - Rockwell hardness, Sc. | HRCe | - coefficient of linear thermal expansion (1/°C) | ||
| - HRB Rockwell hardness, Sc. | HRB | - Longitudinal strength limit (MPa) | σtT | |
| - Shore hardness | HSD | - modulus of elasticity (torsional shear) GPa | ||
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