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C51000

 

Stocked alloy specs

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Reference guide

Stocked size schedules

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✔ Standard-stocked product*

Continuous cast and drawn

Phosphor bronze C51000 contains copper, tin, and phosphorus. Phosphorus increases the wear resistance and stiffness of the alloy. Tin increases the corrosion resistance and strength of the alloy. Lead, zinc, and iron are other named elements. Phosphor bronze alloys are notable for their toughness, strength, good conductivity, and low coefficient of friction.


C510 is also designated as CuSn5, CW451K, and PB102.


In addition to C51000, Wieland Concast offers phosphor bronze alloys C52100, C53400, and C54400. Wieland Concast is the only domestic producer of phosphor bronze.

*H04 hard temper is standard stocked.
C51000 spec sheet C51000 size schedule 500 series brochure Weight calculator Standard products

C51000

Product description: Phosphor bronze 5% A
Tempers: H04 hard, H08 spring
Solids: 3/8" to 2 1/2" O.D.
Hex: 3/8" to 2" O.D.
Standard lengths: 144"

Typical uses

Architecture: Bridge bearing plates
Electrical: Electrical connectors, electrical flexing contact blades, electromechanical spring components, electronic and precision instrument parts, electronic connectors, fuse clips, resistance wire, switch parts, wire brushes
Fasteners: Cotter pins, fasteners, lock washers
Industrial: Beater bar, bellows, bourdon tubes, chemical hardware, clutch disks, diaphragms, perforated sheets, pressure responsive elements, sleeve bushings, springs, textile machinery, truss wire, welding rods

Similar or equivalent specification

CDA ASTM SAE AMS Federal Military Other
C51000 B139
B139M		 J461
J463		 4625      

Chemical composition

Cu% Pb% Sn% Zn% Fe% P%
Chemical composition according to ASTM B139/B139M-12(2024)

Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.
 
Rem.		  
0.05		 4.20-
5.80		  
0.30		  
0.10		 0.03-
0.35

Machinability

Copper alloy UNS No. Machinability rating Density (lb/in3 at 68 °F)
C51000 20 0.320

Mechanical properties

Mechanical properties according to ASTM B139/B139M-12(2024)

C51000

H04 hard

Size range: 1/4" to 1/2" round and hexagonal inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, 4x diameter or specimen thickness, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical HRB
70 485     13 87
Size range: over 1/2" to 1" round and hexagonal inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, 4x diameter or specimen thickness, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical HRB
60 415     15 87
Size range: over 1" round and hexagonal
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, 4x diameter or specimen thickness, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical HRB
55 380     18 87

C51000

H08 spring

Size range: 0.026" to 1/16" round inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, 4x diameter or specimen thickness, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical HRB
115 790          
Size range: over 1/16" to 1/8" round inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, 4x diameter or specimen thickness, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical HRB
110 760          
Size range: over 1/8" to 1/4" round inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, 4x diameter or specimen thickness, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical HRB  
105 725     3.5    
Size range: over 1/4" to 3/8" round inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, 4x diameter or specimen thickness, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical HRB  
100 690     5    
Size range: over 3/8" to 1/2" round inclusive
Tensile strength, min Yield strength, at 0.5% extension under load, min Elongation, 4x diameter or specimen thickness, min Rockwell "B" hardness Remarks
ksi MPa ksi MPa % typical HRB  
90 620     9 95  

Physical properties

Physical properties provided by CDA
*Determined on an alloy containing 5% tin and .2% phosphorus. This value will vary with the composition.
  US Customary Metric
Melting point - liquidus 1920 °F 1049 °C
Melting point - solidus 1750 °F 954 °C
Density 0.32 lb/in3 at 68 °F 8.86 gm/cm3 at 20 °C
Specific gravity 8.86 8.86
Electrical conductivity* 15% IACS at 68 °F 0.088 MegaSiemens/cm at 20 °C
Thermal conductivity 40 Btu/sq ft/ft hr/°F at 68 °F 69.2 W/m at 20 °C
Coefficient of thermal expansion 68-572 9.9 ·10-6 per °F (68-572 °F) 17.1 ·10-6 per °C (20-300 °C)
Specific heat capacity 0.09 Btu/lb/°F at 68 °F 377.1 J/kg at 20 °C
Modulus of elasticity in tension 16000 ksi 110310 MPa
Modulus of rigidity 6000 ksi 41370 MPa

Fabrication properties

Fabrication properties provided by CDA
Technique Suitability
Soldering Excellent
Brazing Excellent
Oxyacetylene welding Fair
Gas shielded arc welding Good
Coated metal arc welding Fair
Spot weld Good
Seam weld Fair
Butt weld Excellent
Capacity for being cold worked Excellent
Capacity for being hot formed Poor
Machinability rating 20

Thermal properties

Thermal properties provided by CDA
*Temperature is measured in Fahrenheit.
Treatment Minimum* Maximum*
Annealing 900 1250

Common fabrication processes

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

Common fabrication processes provided by CDA

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