Looser Aluminium Bronze 75-1 (LAB 75-1) – CuAl10Fe5Ni5-C-GS/GM/GC/GZ DIN EN 1982
Looser Aluminium Bronze 75-1 is an aluminium multi-material casting bronze with high static and dynamic strength properties and is therefore suitable for high surface pressures.
This construction material is highly resistant to corrosion and seawater and resistant to many acids. Good fatigue strength, very resistant to cavitation, high load capacity with good wear resistance.
Hollow profiles made of Looser Aluminium Bronze 75-1 can be produced economically in the centrifugal casting process. For structural parts with even higher strength property, cavitation and / or wear resistance specifications, we recommend Looser Aluminium Bronze 78-1.
Chemical composition (DIN EN 1982:2017-11)
Element Cu Al Ni Fe Mn Zn Si Sn Cr Mg Pb Bi
Min. [%] 76 8.5 4 4 - - - - - -
Max. [%] 83 10,5 6 5,5 3 0,5 0,1 0,1 0,05 0,05 0.03 0.01
Mechanical properties (DIN EN 1982:2017-11)
Continuous casting-GC Centrifugal casting-GZ
Yield point Rp0,2 [N/mm2] ≥ 280 ≥ 280
Tensile strength Rm [N/mm2] ≥ 650 ≥ 650
Brinell hardness [HB] ≥ 150 ≥ 150
Elongation at fracture A [%] ≥ 13 ≥ 13
Bending fatigue strength* Rbw [N/mm2] ± 185 ± 185
Modulus of elasticity** E [kN/mm2] ≥ 110 ≥ 110
* 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.
Worm-gear loading characteristics (c values)
Centrifugal casting-GZ
Continuous operation without cooling 8,5 N/mm2 with v = 2 m/s
5 N/mm2 with v = 4 m/s
Continuous operation with cooling 9 N/mm2 with v = 2 m/s
14 N/mm2 with v = 4 m/s
Short duty cycle [ED] 55 N/mm2 (ED max. 5%)
Physical properties (Guideline values)
Coefficient of thermal expansion [10-6/K] 18 Electrical conductivity [m/Wmm2] 5
Thermal conductivity [W/mK] 60 Specific gravity [kg/dm3] 7,6
Standards
DIN EN 1982 CuAl10Fe5Ni5-C-GS/GM/GC/GZ VSM 10810 G-CuAl10Fe5Ni5 (G-AlBzNi)
DIN 1714 G/GK/GC/GZ-CuAl10Ni (G-NiAlBz F60+F70) BS 1400 AB 2
Material designation
DIN EN 1982 DIN 1705
Abbreviated designation Number Casting method Abbreviated designation Number
CuAl10Fe5Ni5-C-GS CC333G-GS GS or G G-CuAl10Ni 2.0975.01
CuAl10Fe5Ni5-C-GM CC333G-GM GM or GK GK-CuAl10Ni 2.0975.02
CuAl10Fe5Ni5-C-GZ CC333G-GZ GZ GZ-CuAl10Ni 2.0975.03
CuAl10Fe5Ni5-C-GC CC333G-GC GC GC-CuAl10Ni 2.0975.04
GS = G = Sand casting; GM = GK = Permanent mold casting; GZ = Centrifugal casting; GC = Continuous casting
Example uses
- Plain bearings with very high impact loads, crank and toggle bearings with high load peaks (p up to 250 N/mm2).
- The use of Looser Aluminium Bronze 75-1 for gear wheels up to medium speeds is a very significant application. Here, loads up to c = 55 N/mm2 can be sustained for a short time. Worm wheels, gear wheels, helical gear wheels and bevel gear wheels in machine tool construction and chemical plant engineering. Worm wheels for highly stressed construction machinery transmissions. Low noise gear wheels.
- Internal parts for high pressure fittings in hydraulics, hot steam fittings and fittings for high water velocities.
- Pump impellers, housings and bearings, Francis wheels and kaplan blades.
Machinability
Looser Aluminium Bronze 75-1 can be machined like steel with the same strength. This material is suitable for welding using certain methods, but not very suitable for soft or hard soldering.
Sliding partners
Mating steel surfaces should be hardened and ground. Looser Aluminium Bronze 75-1 has no emergency running properties. Sliding parts require good lubrication.
Looser Aluminium Bronze 75-1 – Availability
- Over 50 sizes of tubular bars are available from stock or at short notice.
- Centrifuged rings and bushings pre-turned to the rough sizes or contour.
- Ready-to-install parts in accordance with customer drawing.
We will be more than pleased to advise you.
Subject to technical modifications; no responsibility is accepted for the accuracy of this information.