UNS/CDA C52100
Phospher Bronze, 8% C

 


Specifications
AWS A5.7 Class ERCuSn-C=ASME SFA57 ERCuSn-C=MIL-E-23765/3 (MIL-CuSn-C)

Description
  Phos-Bronze C filler metal is used quite extensively for surfacing applications. The higher tin (Sn) content (7.0-9.0%) gives 밣BC?weld deposits greater hardness and higher tensile/yield strength than Phos-Bronze A. 밣BC?is commonly used for base metals of similar composition, for joining brass alloys and for joining cast iron to carbon steel. Preheating is recommended.

Chemical Composition
(%max., unless shown as range or min.)

 

Cu

Fe

Pb

P

Sn

Zn

Min./Max.

Rem.

.10

.05

.03-.35

7.0-9.0

.20

Nominal

92.0

-

-

.19

8.0

-

Note: Cu + Sum of Named Elements, 99.5% min.

Applicable Specifications

Product

Specification

Bar

ASTM B103, B139

Electrode, Welding

AWS A5.6
MILITARY MIL-E-23765/3

Plate

ASTM B103

Rod

ASTM B139

Rod, Welding

AWS A5.15

Shapes

ASTM B139

Sheet

ASTM B103
SAE J461, J463

Strip

ASTM B103, B888
SAE J461, J463

Wire

ASTM B159

 

Common Fabrication Processes
Blanking, Drawing, Forming and Bending, Shearing, Stamping

Fabrication Properties

Joining 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

 

Physical Properties

 

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
 @ 20 C

Specific Gravity

8.8

8.8

Electrical Resistivity

79.8 ohms-cmil/ft @ 68 F

13.27 microhm-cm @ 20 C

Electrical Conductivity

13 %IACS @ 68 F

0.076 MegaSiemens/cm @ 20 C

Thermal Conductivity

36.0 Btu · ft/(hr · ft2·o
 F)at 68F

62.3 W/m · o
 K at 20 C

Coefficient of Thermal
Expansion

10.1 ·10-6
 per o
 F (68-572 F)

18.2 ·10-6
 per o
 C (20-300 C)

Specific Heat Capacity

0.09 Btu/lb/o
 F at 68 F

377.1 J/kg · o
 K at 293 K

Modulas of Elasticity
in Tension

16000 ksi

110000 MPa

Modulus of Rigidity

6000 ksi

41370 MPa


Typical Uses

Architecture
Bridge Bearing Plates
Building
Thermostat Bellows
Consumer
Power Conductor for Electro-Surgical Pencil, Cymbals, Coinage
Electrical
Electronic Connectors, Electrical Flexing Contact Blades, Electrical Flexing Contact Blades, Electrical Connectors, Cold Headed Parts, Wire Brushes, Switch Parts, Fuse Clips
Fasteners
Fasteners, Heavy Duty, Lock Washers, Cotter Pins
Industrial
Doctor Blades, Paper Industry, Welding Wire, Beater Bar, Clutch Disks, Bourdon Tubing, Diaphragms, Sleeve Bushings, Springs, Heavy Duty, Pneumatic Hammers, Well Drill Equipment, Thrust Bearings, Cold Headed Parts, Pinions, Gears, Clips, Heavy Duty, Springs, Helical Torsion, Springs, Helical Extension, Bellows, Truss Wire, Chemical Hardware, Perforated Sheets, Textile Machinery
Marine
Marine Parts