Brass Copper Castings India
Phosphor Bronze Alloy C51000

Copper Alloy No. C51000
Phosphor Bronze, 5%A CDA 510 Phosphor Bronze , ASTM B 139
Chemical Composition % by weight
Element Nominal Minimum Maximum
Copper 94.8 Rem. Rem.
Lead - - .05
Iron - - .10
Tin 5 4.2 5.8
Zinc - - .30
Phosphorus .20 .03 .35


Clutch disks, cotter pins, diaphragms, fuse clips, fasteners, lock washers, sleeve bushings, springs, switch parts, chemical hardware, welding rods.

Common Fabrication Processes

Blanking, drawing, forming and bending, heading and upsetting, roll threading and knurling, shearing, stamping. 

Mechanical Properties

Typical for 1" Rod Half Hard (20%) Temper

Hardness* Rockwell B Scales 78
Tensile Strength** KSI 70
Yield Strength** (.5% EAU) KSI 58
Elongation** % in 2 inch 25

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

Physical Properties

Thermal Conductivity BTU/ (sq ft-ft-hr-F) 40
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 572 F .0000099
Density lb/cu in @ 68 F .320
Electrical Conductivity* (Annealed) % IACS @ 68 F 15
Modulus of Elasticity (Tension) KSI 16,000

*Volume basis

Fabrication Properties

Capacity for being cold worked Excellent
Capacity for being hot formed Poor
Machinability rating (Free Cutting Brass=100) -
Suitability for being joined by: Soldering/Excellent
Oxyacetylene Welding/Fair
Gas Shielded Arc Welding/Good
Coated Metal Arc Welding/Fair
Resistance Welding Spot/Good