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METALCO supplies copper, brass, and bronze semi-finished products for OEMs and distributors worldwide — with documented quality, export packing, and technical support you can rely on.

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C510 Phosphor Bronze – Grade A

Bronze Rods / C510 Phosphor Bronze – Grade A

C510 Phosphor Bronze Grade A is a premium copper alloy known for its excellent strength, wear resistance, fatigue durability, and corrosion protection. It offers outstanding spring properties and reliable machinability, making it ideal for bushings, bearings, electrical connectors, springs, marine hardware, and precision engineering applications.

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Description
Chemical Composition
Physical Properties
Sizes Available

Bronze Family: Phosphor Bronze
C 510 Phosphor Bronze – Grade A is a METALCO standard alloy and finds use in electrical applications, as well as fasteners and industrial applications. Uses include various electrical connectors, fasteners, cotter pins and lock washers, sleeve bushings, welding rod, springs, perforated sheets and clutch disks.

Specification :
Phosphros Bronze	ASTM B103 C 51000 SAE J 463 C 51000 BS 2874 PB 102

Equivalent Specifications*

ASTM B139
B139M

Reference Specifications*

SAE J461
SAE J463
AMS 4625

* Equivalent specifications are verified and updated annually.
Specifications shown are current as of May 4, 2010.

Chemical Composition (%)
Cu	Sn	P	Fe	Pb	Zn
Remainder	4.2 – 5.8	0.03 – 0.35	0.10 max.	0.05 max	0.30 max
Sum of all named elements = 99.5%

Mechanical Properties Minimum Tensile Properties, English/Metric
Temper HO4 hard
Nominal Diameter	Tensile Strength		Elongation**
Inches/mm	ksi	MPa	%
¼"– ½" incl./6 - 12 mm. incl.	70	485	13
Over ½" to 1" incl./12-25 mm incl.	60	415	15
Over 1.00"/25 mm	55	380	18

Elongation in 4D
Chemical Composition and Mechanical Properties shown pertain to ASTM B139/B139 M only.

Machinability Rating 20 (Free Cutting Brass = 100)

Physical Properties
	English	Metric
Melting Point – Liquidus	1920° F	1049° C
Melting Point – Solidus	1750° F	954° C
Density	0.320 lb/in3 at 68° F	8.86 gm/cm3 @ 20° C
Specific Gravity	8.860	8.86
Electrical Resistivity (Annealed)	69.10 ohms-cmil/ft @ 68° F	11.49 microhm-cm @ 20° C
Electrical Conductivity (Annealed)	15%IACS @ 68° F	0.088 MegaSiemens/cm @ 20° C
Thermal Conductivity	40 Btu · ft/(hr · ft2·°F) @ 68° F	69.2 W/m·°K @20° C
Coefficient of Thermal Expansion	9.90 · 10−6 per °F (68-572° F)	17.8 ·10−6 per °C (20-300° C)
Specific Heat Capacity	0.090 Btu/lb/°F @ 68° F	377.1 J/kg · °K @293° K
Modulus of Elasticity in Tension	16,000 ksi	110,000 MPa

Fabrication Practices
Soldering	Excellent	Capacity for Being Cold Worked	Excellent
Brazing	Good	Capacity for Being Hot Formed	Poor
Oxyacetylene Welding	Fair
Gas Shielded Arc Welding	Good	Annealing Temperature – Minimum	900° F or 483° C
Coated Metal Arc Welding	Fair	Annealing Temperature – Maximum	1250° F or 677° C
Resistance Welding – Spot	Good
Resistance Welding – Seam	Fair
Resistance Welding – Butt	Excellent