COLDUR-A® High Silicon Bronze: Superior Strength, Corrosion Resistance, and Easy Fabrication
2.1525 (CuSi3Mn) is a high copper alloy that is renowned for its combination of strength, corrosion resistance and formability and for its attractive colour. Known as a high silicon bronze, COLDUR-A® (C65500) is renowned as being one of the easiest of all copper alloys to fabricate - by a wide range of techniques - and is readily formable by both hot and cold methods. It offers excellent forming characteristics combined with an attractive rich, reddish old gold colouration that makes the alloy highly desirable for many architectural and decorative applications. It shows the following features and properties:
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 8.53 g/cm³ |
Mechanical
| Property | Temperature | Value |
|---|---|---|
Elastic modulus | 23.0 °C | 105 GPa |
Elongation | 23.0 °C | 20 % |
Hardness, Brinell | 23.0 °C | 75 - 95 [-] |
Tensile strength | 23.0 °C | 485 MPa |
Yield strength Rp0.2 | 23.0 °C | 260 MPa |
Thermal
| Property | Temperature | Value |
|---|---|---|
Melting point | 970 - 1025 °C | |
Thermal conductivity | 23.0 °C | 36 W/(m·K) |
Chemical properties
| Property | Value | Comment | |
|---|---|---|---|
Copper | Balance | ||
Iron | 0.8 % | max. | |
Manganese | 0.5 - 1.3 % | ||
Silicon | 2.8 - 3.8 % | ||
Zinc | 1.5 % | max. | |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Architectural & decorative: Furniture, fire place surrounds, nameplates, sculptures, signs, bolts, cladding, door and window frames, hinge pins, latches, masonry fixings, slate and tile nails, panels, spring brackets, screws, step irons, tension bolts and wall ties;Electrical: current-carrying electrical components such as slip rings, squirrel cages, springs, rotary switch contacts, contact blades, short-circuit rings, heavy-duty switchgear, bearing plates, bolts, busbar clamps, bushes, clutch discs, cotter pins, electrical conduit, fasteners, locking washers, piston rings, thrust washers and u-bolts;Automotive: valve guides, bushes and valve seats;Chemical processing: Autoclaves, chemical apparatus, drains, explosives plant, fans and ducts for corrosive vapours, fasteners, heat exchanger tube plates, filters, pickling and recovery plant, pressure vessels, pump rods and shafts, screen plates, stirrers, valve stems, vats and washers;Offshore & marine: Fasteners, propeller shafts, hull and deck fittings, fuel and water tanks, non-magnetic instrumentation, subsea electromechanical equipment and other hardware | |
| Cold Forming | Excellent cold formability | |
| Corrosion properties | Excellent corrosion resistance | |
| Hot forming | Excellent hort formability, Hot Working Temperature (°C): 710-870 | |
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