Wire, pipe, rod made of CuSn5ZnPb5, SnZnPb-555
Bronze alloy CuSn5ZnPb5
Grade: casting tin bronze. It has duplex structure. It is alloyed with phosphorus, plumb, zinc.
Industrial usage: bearing bushes, antifriction details, fitting.
Percentage composition according to GOST 613−79
|Cu||80.7 — 88|
|Zn||4 — 6|
|Pb||4 — 6|
|Sn||4 — 6|
Alloying components increase density, fluidity of material and significantly reduce tendency to segregation. Bronze of this grade is badly exposed to pressure treatment. However, it possesses good resistance to corrosion, excellent cutability. This bronze has excellent antifriction properties. It is used in a manufacture of sleeve bearing blocks. Shims, bushings for tractors and cars are made of this grade.
Coefficient of friction with lubricant = 0.016
Coefficient of friction without lubricant = 0.26
Alloy hardness = HB 10 -1 = 60 MPа
Heat treatment: without heat treatment
Linear shrinkage = 1.5%
Casting temperature = 1250 — 1300°C
This grade is one of the most requested bronzes on contemporary market of bronze mill-products. Bushings, pipe products, rod are manufactured with a help of continuous casting. In comparison with a pressing method, casting of bar assumes high strength, perfect physical properties. Such alloy has a vast scope of application. Cracks, surface blemishes, over prominence must not be present on a metal surface. However, there are acceptable markings made by withdrawal-roll facility. Bushing is made with a help of centrifugal casting and further machine processing. Bushing has high strength even at increased loads and rough working conditions. Pipes made of this alloy are very popular because they are resistant to corrosion.
R 10 9(Ohm-m)
a 10 -6 (1/Degree)
E 10 -5 (MPa)
Mechanical characteristics of alloy at a temperature 20 °C.
|Mill-products||ψ %||Size||σv (MPa)||sT (MPa)||δ5 (%)||F.e.|
|— differential deposit at a process of the first crack appearing, %||å||— ultimate tensile strength (rupture strength), MPa||σv|
|— maximum shear stress, ultimate torsional strength, MPa||Jê||— elastic strength, MPa||σ0,05|
|— ultimate bending strength, MPa||σ bend||— conventional yield limit, MPa||σ0,2|
|— fatigue endurance limit during torsion test with symmetrical load cycle, MPa||σ-1||— percentage elongation after rupture, %||δ5,δ4,δ10|
|— fatigue endurance limit during torsion test with symmetrical load cycle, MPa||J-1||— yield point (contraction), MPa||σc 0,05|
|— amount of load cycling||n||— relative shear, %||v|
|— specific electrical resistance, Ohmm||R and ρ||— short ultimate tensile strength, MPa||sv|
|— standard module of elasticity HPa||E||— contraction ratio, %||ψ|
|— properties getting temperature, Degree||T||— impact hardness, which is established on specimens with concentrators in accordance with V and U types, J/cm2||KCU and KCV|
|— heating capacity of alloy (heat conduction coefficient), V/(m°С)||l||— permanent change of form — yield point (proportionality), MPa||sT|
|— specific heat of alloy (temperature range is 20°С), [J/(kg-deg)]||C||— Brinell hardness||HB|
|— density, kg/m3||pn and r||— Vicker’s hardness||HV|
|— lineal thermal expansion coefficient (in a temperature range of 20°С), 1/°С||a||— Rockwell hardness C||HRC|
|— long-time strength limit, MPa||σtТ||— Rockwell hardness B||HRB|
|— module of elasticity at a process of torsional shear, HPa||G||— Shore hardness||HSD|
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