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Copper Alloy No. C65500

High Silicon Bronze A , CDA 655 Everdur

Chemical Composition % by weight

Element Nominal Minimum Maximum
Copper 97 Rem. Rem.
Lead - - .05
Iron - - .80
Zinc - - 1.5
Manganese .90 .50 1.3
Silicon 3 2.8 3.8
Nickel - - .60

Applications

Aircraft: Hydraulic pressure lines.

Hardware: Bolts, burrs, butts, clamps, cotter pins, hinges, marine hardware, nails, nuts, pole line hardware, screws.

Industrial: Bearing plates, bushings, cable, channels, chemical equipment, heat exchanger tubes, kettles, piston rings, tanks, rivets,  screen cloth and wire, screen plates, shafting.

Marine: Propeller shafts. 

Common Fabrication Processes

Blanking, drawing, forming and bending, heading and upsetting, hot forging and pressing, roll threading and knurling, shearing, squeezing and swaging.

Mechanical Properties

Typical for 1" Rod Hard (36%) Temper

Hardness* Rockwell B Scales 90
Tensile Strength** KSI 92
Yield Strength** (.5% EAU) KSI 55
Elongation** % in 2 inch 22

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 21
Specific Heat BTU/lb/F @ 68F .09
Thermal Expansion Per F from 68 F to 572 F .0000100
Density lb/cu in @ 68 F .308
Electrical Conductivity* (Annealed) % IACS @ 68 F 7
Modulus of Elasticity (Tension) KSI 15,000

*Volume basis

Fabrication Properties

Capacity for being cold worked Excellent
Capacity for being hot formed Excellent
Hot forgeability rating (forging brass =100) 40
Suitability for being joined by: Soldering/Good
Brazing/Excellent
Oxyacetylene Welding/Good
Gas Shielded Arc Welding/Excellent
Coated Metal Arc Welding/Fair
Resistance Welding Spot/Excellent
Seam/Excellent
Butt/Excellent

The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.