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
- 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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