Looser Aluminium Bronze 72-1 (LAB 72-1) – CuAl10Fe2-C-GS/GM/GC/GZ DIN EN 1982

Looser Aluminium Bronze 72-1 is a construction material with low temperature dependence between -200°C and + 200°C.
Bushings made of Looser Aluminium Bronze 72-1 can be produced economically in the centrifugal casting process.

The following alloys belong to the same group of aluminium multi-material bronzes:

Chemical composition (DIN EN 1982:2017-11)

Element	Cu	Al	Fe	Ni	Mn	Zn	Si	Sn	Pb	Mg
Min. [%]	83	8.5	1.5	-	-	-	-	-	-	-
Max. [%]	89.5	10.5	3.5	1.5	1	0.5	0.2	0.2	0.1*	0.05

* For castings, which will be welded, must be the lead content limited to maximum of 0,03%.

Mechanical properties (DIN EN 12165:2016-11)

		Continuous casting-GC	Centrifugal casting-GZ
Yield point R_p0,2	[N/mm²]	≥ 200	≥ 200
Tensile strength R_m	[N/mm²]	≥ 550	≥ 550
Brinell hardness	[HB]	≥ 130	≥ 130
Elongation at fracture A	[%]	≥ 15	≥ 18
Bending fatigue strength* R_bw	[N/mm²]	± 210	± 210
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.

Physical properties (Guideline values)

Coefficient of thermal expansion	[10^-6/K]	16	Electrical conductivity	[m/Wmm²]	5
Thermal conductivity	[W/mK]	55	Specific gravity	[kg/dm³]	7.5

Material designation

DIN EN 1982			DIN 1705
Abbreviated designation	Number	Casting method	Abbreviated designation	Number
CuAl10Fe2-C-GS	CC331G-GS	GS bzw. G	G-CuAl10Fe	2.0940.01
CuAl10Fe2-C-GM	CC333G-GM	GM bzw. GK	GK-CuAl10Fe	2.0940.02
CuAl10Fe2-C-GZ	CC331G-GZ	GZ	GZ-CuAl10Fe	2.0940.03
CuAl10Fe2-C-GC	CC331G-GC	GC	-	-

GS = G = Sand casting; GM = GK = Permanent mold casting; GZ = Centrifugal casting; GC = Continuous casting

Example uses

Mechanically stressed parts; levers, housings, bushings.
Carbon brackets in the electrical industry.
Fittings in the furniture industry.
Pinion and bevel gear wheels.
Synchroniser rings, switching segments and shift forks in textile machinery and automotive construction.

Machinability

Looser Aluminium Bronze 72-1 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 finely machined. Looser Aluminium Bronze 72-1 has no emergency running properties. Sliding parts require good lubrication.

Looser Aluminiumbronze 72-1 – Availability

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.

Links

Additional information can be found in this Looser Bronzen catalogue or under download.

Material data sheet
Looser Aluminiumbronze 72-1
PDF

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