Looser Bronze 55 (LB 55)
CuSn10-C-GS/GC/GZ DIN EN 1982
Looser Bronze 55 is a tough tin bronze that is often found on old drawings today. In practice, Looser Bronze 65 has clearly prevailed. The main supply options are for centrifugal cast products, where rings and bushings are pre-turned or machined to drawing ready for installation. We are happy to help.
Chemical composition (DIN EN 1982:2017-11)
* inclusive Ni
Element Cu* Sn Ni Pb Zn Fe P Sb Mn S Si Al
Min. [%] 88 9 - - - - - - - - -
Max. [%] 90 11 2 1 0.5 0,2 0,2 0,2 0,1 0,05 0,02 0.01
Mechanical properties (DIN EN 1982:2017-11)
Continuous casting-GC Centrifugal casting-GZ
Yield point Rp0,2 [N/mm2] ≥ 170 ≥ 160
Tensile strength Rm [N/mm2] ≥ 280 ≥ 280
Brinell hardness [HB] ≥ 80 ≥ 80
Elongation at fracture A [%] ≥ 10 ≥ 10
Bending fatigue strength* Rbw [N/mm2] ± 100 ± 100
Modulus of elasticity** E [kN/mm2] ≥ 90 ≥ 90
* Guideline value with 108 load cycles and at 20°C / ** Guideline value
The sample bar is removed from the casting in the case of centrifugal castings and continuous castings. The sample position – e.g. lengthwise or crosswise sample – must be agreed between orderer and manufacturer: the values specified in the table apply only to wall thicknesses up to 50 mm for the blank casting. In the case of wall thicknesses over 50 mm, with the wall thickness of the blank casting being the decisive factor, it must be anticipated that the strength and hardness values are lower. This applies in particular to the yield point.
It must not be expected that the strength and hardness values are uniformly high at all points of the casting. In general, the values in the outer layers will be higher than in the core zone.
Physical properties (Guideline values)
Coefficient of thermal expansion [10-6/K] 18,5 Electrical conductivity [m/Wmm2] 7
Thermal conductivity [W/mK] 59 Specific gravity [kg/dm3] 8,7
Standards
DIN EN 1982 CuSn10-C-GS/GC/GZ DIN 1705 G-CuSn10 (G-SnBz10)
VSM 10810 G-CuSn10 (GBz10) ASTM Alloy C 92700
Material designation
DIN EN 1982 DIN 1705
Abbreviated designation Number Casting method Abbreviated designation Number
CuSn10-C-GS CC480K-GS GS or G G-CuSn10 2.1050.01
CuSn10-C-GC CC480K-GZ GZ - -
CuSn10-C-GC CC480K-GC GC - -
GS = G = Sand casting; GZ = Centrifugal casting; GC = Continuous casting
We will be more than pleased to advise you.
Subject to technical modifications; no responsibility is accepted for the accuracy of this information.
Links
Additional information can be found in this Looser Bronzes catalogue or under download.