Brass

Brass is a Copper-Zinc alloy which is harder than copper and less hard compare to bronze. By changing proportions of Copper and Zinc, varying mechanical and electrical properties of brass can be achieved. It usually contains at least 50% Copper as it becomes brittle below this limit. Brass has the property to cover itself with natural patina which form the protecting layer against the corrosion. The most common Brass alloy is CuZn37.

material_brass
AlloyCompositionApplications
CuZn33Pb2-CCu 63,0 - 66,0
Pb 1,0 - 3,0
Zn Rest
Gas - water fittings and other general purposes
CuZn39Pb2AlCu 58,0 - 63,0
Pb 0,2 - 1,4
Al 0,3 - 0,9
Plumbing fittings
CuZn39Pb3Cu 57,0 - 59,0
Pb 2,5 - 3,5
Zn Rest
Excellent machinability. "drilling and turning quality", for automatic machining. Turned parts of all kinds. Good hot formability but very limited cold workability. Used as a standard against other material. Drop forging.
CuZn38Pb1 Cu 60,0 - 61,0
Pb 0,8 - 1,6
Zn Rest
Good both hot and cold forming properties. Good machinability. Extreme riveting. Bendable, embossable and compressible.
CuZn36Pb2AsCu 61,0 - 63,0
Pb 1,7 - 2,8
As 0,02 - 0,15
Zn Rest
Dezincification resistant brass. Good machinability. Moderate hot and cold formable.
CuZn37Cu 62,0 - 64,0
Zn Rest
Main alloy for cold forming (deep drawing, pressing, upsetting, thread rolling, bending, flanging). Good solderability and weldability, electrically polishable.
CuZn38Al-CCu 59,0 - 64,0
Al 0,1 - 0.8
Zn Rest
High quality engineering parts.
CuZn37Al-CCu 60,0 - 64,0
Al 0,3 - 1,8
Zn Rest
High quality engineering parts.
CuZn35Pb2AlAsCu 60,0 -63,0
Pb 1,1 - 1,3
Al 0,2 - 0,5
As ⩽ 0.1
Zn Rest
High quality engineering parts.
CuZn33Pb2Si-CCu 63,5 - 66,0
Pb 0,8 - 2,2
Si 0,7 - 1,1
Zn Rest
High quality engineering parts.
CuZn37Mn3Al2PbSiCu 57,0 - 59,0
Mn 1,5 - 3,0
Al 1,3 - 2,3
Pb 0,2 -0,8
Si 0,3 - 1,3
Zn Rest
Construction material with high strength. Good resistance to atmospheric-, water-, gases- and oil corrosion. For high demands on sliding stress, high wear resistance. Medium machinability. Construction parts in mechanical engineering, plain bearings (bushings), valve guides, gear parts, piston rings.
CuZn35Ni3Mn2AlPbCu 58,0 - 60,0
Ni 2,0 - 3,0
Mn 1,5 - 2,5
Al 0,3 - 1,3
Pb 0,2 -0,8
Zn Rest
Medium to high strength material. Seawater resistant. Medium machinability. Apparatus engineering, shipbuilding.
CuZn40Mn2FeCu 56,5 - 58,5
Mn 1,0 - 2,0
Fe 0,5 - 1,5
Zn Rest
Aluminium-free construction material with medium strength. Solderable. Medium machinability. Weather resistant. Apparatus engineering, architecture ("architectural bronze").
CuZn38Sn1AsCu 59,0 - 62,0
Sn 0,5 - 1,0
As 0,02 - 0,06
Pb ⩽ 0,2
Zn Rest
'Navy Brass''. Construction material of medium strength, good thermoforming properties. Seawater resistant. Apparatus engineering, tubes for condensers and heat exchangers. fittings and propeller shafts for boats.
CuZn31SiCu 66,0 - 70,0
Si 0,7 -1,3
Pb ⩽ 0,8
Zn Rest
Sliding Bearing (Bushing)material for high loads. Sliding Bearing bushings, guides and other sliding elements.
CuZn35Mn2Al1Fe1-CCu 57,0 - 65,0
Mn 0,5 - 3,0
Al 0,5 - 2,5
Fe 0,5 - 2,0
Pb ⩽ 0,5
Zn Rest
Medium strength and machinability, moderate sliding properties. Compression nuts, ground bushes and stuffing boxes, marine propellers, valve parts and control parts.
CuZn25Al5Mn4Fe3-CCu 60,0 - 67,0
Mn 2,5 - 5,0
Al 3,0 - 7,0
Fe 1,5 - 4,0
Pb ⩽ 0,2
Zn Rest
Very high strength material. Bearings with high load and low sliding speed. Highly stressed, slow-running worm wheel rims, internal parts of high-pressure fittings.
CuZn35AlFeMn
HSBC. HTB-1
Cu 58,5 - 61,0
Al 0,5 - 1,0
Fe 0,5 - 1,5
Mn 1,7 - 2,5
Zn Rest
High tensile brass. High static duty at very low circumferential velocity. Components under high stress at normal temperature. Plain bearings, Collar bushings,, Marine casting and fittings, pump housing, hydraulic equipments, locomotive axels, heavily loaded and slow moving gears, spur, housing nuts.