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CuSi3Mn1 – UNS.C65500 Higher Silicon Bronze Alloys

C65500 Details & Applications:
C65500 Higher Silicon Bronze

CuSi3Mn – UNS.C65500 Silicon Bronze Alloys, which is high strength, engineering alloys have excellent resistance to a wide range of corrosives, including fresh and salt water, most acids, alkalis, salts, and organic chemicals.  However, they are not suitable for use with sulfides, nitric acid, acid chromates, or oxidizing salts such as ferric chloride. It has a combination of corrosion resistance, strength, resilience, and formability that makes them among the most widely used copper alloys.  They are also noted to be non-sparking, galling resistant, and fatigue resistant. C65500 is nominally composed of 95.8% copper, 3.3% silicon, and 0.9% manganese, so the typical applications of C65500 include electrical conduit, pump shafts, valve stems, tie rods, fasteners, marine and pole-line hardware, nuts, bolts, screws, rivets, nails, bushings, screen cloth and wire.

Typical Application for C65500 Silicon Bronze Alloys:
Aircraft: Hydraulic Pressure Lines
Electrical: Pole Line Hardware, Motors, Rotor Bar
Fasteners: Screws, Rivets, Burrs, Nuts, Nails, Cotter Pins, Clamps, Bolts, Hinges
Industrial: Screen Cloth, Wear Plates, Screen Plates, Shafting, Wire, Welded Pressure Vessels, Oil Refinery Plumbing Tube, Bearing Plates, Butts, Bushings, Cable, Channels, Chemical Equipment, Heat Exchanger Tubes, Kettles, Hydraulic Pressure Lines, Tanks, Piston Rings, Doctor Blades, Paper Industry, Pressure Vessels, Welded Tanks
Marine: Propeller Shafts
Available Sizes:
Custom Diameter & Sizes, Random Mill lengths

Available Products (forms):
Round bars, Flat bars, Square bars, Rectangular bars, Hexagon bars
Custom shapes are available upon request.

Chemical Composition:

Si: 2.80-3.80%
Mn: 0.50-1.30%
Fe: 0.80% Max.
Zn: 1.50% Max.
Pb: 0.05% Max.
Cu: Balance
Note: Copper plus additions equal 99.50% minimum.

Typical Physical Properties:

Specific Gravity: 8.53 g/cm3
Coefficient of Thermal Expansion per °C: 18 x 10-6 (20-100°C)
Electrical Conductivity (% IACS): 7 % @ 68 F
Thermal Conductivity: 21.0.0 Btu · ft/(hr · ft2·oF)at 68F
Modulus of Elasticity in tension: 15000 ksi

1). the units are based upon US Customary.
2). the typical physical properties apply to age hardened products.

International Specification:

Rods/Bars: UNS.C65500, CDA655, ASTM B98 / B124 / B105 / B99

European Standards: CuSi3Mn1, DIN EN 13347/14640, CW116C to EN

ASTM: American Society for Testing and Materials
RWMA: Resistance Welder Manufacturers' Association
Note: Unless otherwise specified, material will be produced to DIN & RWMA.

Mechanical Properties:

The detailed Mechanical Properties will be available on request from customers.

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