Looser Special Brass 23 (LSM 23) – G/GZ-CuZn40Fe DIN 1709
Chemical composition (DIN 1709)
Element Cu Fe Zn Mn Ni* Sn Al** P** Pb** Si**
Min. [%] 56 0,2 - - - - - - - -
Max. [%] 62 1,2 Rest 2,5 2 1 0,1 0,05 1 0,1
* count as Cu / ** other admixtures max 1,2%
Mechanical properties (DIN 1709)
Sand casting-G Centrifugal casting-GZ
Yield point Rp0,2 [N/mm2] ≥ 130 ≥ 150
Tensile strength Rm [N/mm2] ≥ 300 ≥ 325
Brinell hardness [HB] ≥ 75 ≥ 85
Elongation at fracture A [%] ≥ 15 ≥ 15
Bending fatigue strength* Rbw [N/mm2] ± 155 ± 155
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] 8,5
Thermal conductivity [W/mK] 50 Specific gravity [kg/dm3] 8,6
Material designation
DIN EN 1982 DIN 1709
Abbreviated designation Number Casting method Abbreviated designation Number
- - G G-CuZn40Fe 2.0590.01
- - GZ GZ-CuZn40Fe 2.0590.03
G = Sand casting; GZ = Centrifugal 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.