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Brocs4-3 sheet, strip, pipe

Brocs4-3 sheet, strip, pipe

Properties Brocs4−3

Class tin bronze, processed under pressure.

Industrial use: for parts of chemical apparatus, contacts of the plug connectors and current-carrying springs.

The chemical composition of the alloy Brocs4−3

P 0.03
Cu 92,5 — 93,8
Si to 0.002
Fe to 0.05
Zn Is 2.7 — 3.3
Sn 3,5 — 4
Pb to 0.02
Sb to 0.002

Main qualities:

Hardness of alloy: HB 10 -1 = 50 — 70 MPa

Melting point: 1045°C

Mechanical properties of grade alloy Brocs4−3 at 20o With

Rental σв (MPa) Size KCU (kJ / m2) δ5 (%) Eg. sT (MPa) ψ %
hard alloy 500−600     3−6      
soft alloy 300−400     35−45      
Physical characteristics grade alloy Brocs4−3
l (W/(m·deg)) 10 R9(Ω·m) C (j/(kg·hail)) a 10-6(1/Deg) E 10-5(MPa) T (Deg) r (kg/m3)
84 90     1.24 20 8800
      18   100  

Characteristics of tin bronzes.

Bronze tin Brocs4−3 have elevated anti-friction quality, they are non-magnetic, cold-resistant, insensitive to overheating, have low volume shrinkage (about 0.8%), which are widely used in the molding art. The main disadvantage of tin bronzes is the formation of small pores in castings that may result in reduction tightness. Bronze tin lagerbuchse lead, zinc, Nickel, phosphorus.


In the smelting process of copper and tin is formed solid solutions strongly prone to phase separation due to the high temperature interval of crystallization. Containing tin alloys over 5% have in its structure due to segregation eutectoid component e (a+d), which consists of hard and soft phases. The structure of this type is for items favorable sliding bearings: solid particles provide abrasion resistance, the soft phase gives excellent pererabatyvaemogo, therefore, tin bronze are excellent antifriction materials.

Foundry-technological characteristics of alloy grades Brocs4−3
Melting point 1045°C
Annealing temperature 550 — 650°C
The temperature of the hot processing 700−800°C
is the relative draught in processe the appearance of the first cracks, in % å   — the ultimate tensile strength (rupture strength), MPa σв
— maximum shear stress, the ultimate strength in torsion, MPa   — the limit of elasticity in MPa σ0,05
— tensile strength during bending in MPa σизг   — yield strength, MPa σ0,2
— the endurance limit during the test with a symmetrical cycle of loading in bending, MPa σ-1   — relative elongation after rupture, % δ5,δ4,δ10
— the endurance limit during testing with a symmetrical load cycle torsion, MPa J-1   — yield strength (compression), in MPa σсж0,05 and σсж
— number of loading cycles n   — the relative shift in % ν
— specific email. resistance, Ohm·m R and ρ   — short-term tensile strength, in MPa blower SB
is the normal modulus of elasticity, GPA E   contraction ratio in % ψ
temperature get the properties, Grad T   — impact strength installed in the specimens with concentrators in accordance with the type V and U, in j/cm2 KCU and KCV
— the heat capacity of the alloy (coefficient of thermal conductivity) in W/(m·°C) l and ë   — residual deformation — the yield strength (limit of proportionality), in MPa sT
— specific heat of the alloy (at 20°C), in [j/(kg·deg)] C   — Brinell hardness number HB
— density in kg/m3 pn and r   — hardness according to Vickers HV
— coefficient of linear thermal expansion (for t° 20°C), in 1/°C and   — Rockwell hardness, SHK. With HRC
— long-term strength, MPa σtТ   — Rockwell hardness, SHK. In HRB
— the modulus of elasticity is in the process of shear in torsion, HPa G   — hardness shore HSD

Buy at best price

Rental, manufactured by LLC «AVEK global» bronze brand Brocs4−3 will satisfy any demands. Popular products from this alloy is due to excellent quality products, a wide variety of options and the actual cost. All the products from bronze alloys produced by our company, is produced under the complete technological control at all stages that guarantees the highest quality products. The company «AVEK global» is ready to manufacture custom products non-standard sizes. Manufacturing process capabilities allow us to execute orders according to individual drawings in the absence of the required type of product in standard version.