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C52100

Stocked alloy specs

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Reference guide

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Continuous cast and drawn

Phosphor bronze C52100 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.


C521 also designated as as CuSn8P, UE9P, CW451K, PB104, BS2B24, and DTD265A.


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

C52100 spec sheet 500 series brochure Standard products

C52100

Product description: Phosphor bronze 8% C
Tempers: H04 hard
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
Builders hardware: thermostat bellows
Consumer: coinage, cymbals, power conductor for electro-surgical pencil
Electrical: cold headed parts, electrical connectors, electrical flexing contact blades, electronic connectors, fuse clips, switch parts, wire brushes
Fasteners: cotter pins, fasteners, heavy-duty, lock washers
Industrial: beater bar, bellows, bourdon tubing, chemical hardware, heavy duty clips, clutch disks, cold headed parts, diaphragms, doctor blades for the paper industry, gears, perforated sheets, pinions, pneumatic hammers, sleeve bushings, heavy duty springs, helical extension springs, helical torsion springs, textile machinery, thrust bearings, truss wire, welding wire, well drill equipment
Marine: marine parts

Similar or equivalent specification

CDA ASTM SAE AMS Federal Military Other
C52100 B139B139M          

Chemical composition

Cu% Pb% Sn% Zn% Fe% P%
Chemical composition according to ASTM B139/B139M-12(2017)

Note: Cu + sum of named elements, 99.5% min. Single values represent maximums.
 
Rem.		  
0.05		 7.00-
9.00		  
0.20		  
0.10		 0.03-
0.35

Machinability

Copper alloy UNS No. Machinability rating Density (lb/in3 at 68 °F)
C52100 20 0.318

Mechanical properties

Mechanical properties according to ASTM B139/B139M-12(2017)

C52100

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
85 585     12 93
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
75 515     15 93
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
60 415     20 93

Physical properties

Physical properties provided by CDA
  US Customary Metric
Melting point - liquidus 1880 °F 1027 °C
Melting point - solidus 1620 °F 882 °C
Density 0.318 lb/in3 at 68 °F 8.8 gm/cm3 at 20 °C
Specific gravity 8.80 8.80
Electrical conductivity 13% IACS at 68 °F 0.076 MegaSiemens/cm at 20 °C
Thermal conductivity 36 Btu/sq ft/ft hr/°F at 68 °F 62.3 W/m at 20 °C
Coefficient of thermal expansion 68-572 10.1 ·10-6 per °F (68-572 °F) 17.4 ·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 6400 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 Good
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

Bending, blanking, forming, knurling, machining, roll threading, shearing, stamping, upsetting

Common fabrication processes provided by CDA

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