Manufacturer of custom machined parts, specializing in bronze and other alloys for your engineered applications
419.223.1075
1046 Greenlawn Ave, Lima OH 45804
NOW HIRING
COPPER-BASED ALLOYS
C52100
CAST C52100
Phosphor bronze alloys such as C52100, also known as C521, consist of copper with 0.50–11.00% of tin and 0.01–0.35% phosphorus. The tin increases the corrosion resistance and strength of the alloy. The phosphorus increases the wear resistance and stiffness of the alloy. These alloys are notable for their toughness, strength, low coefficient of friction, and fine grain.
INFORMATION
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.
RECTANGLES: Consult Mill
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
B139 B139M
CHEMICAL COMPOSITION
Cu%
Pb%
Sn%
Zn%
Fe%
P%
Rem.
0.05
7.00-9.00
0.20
0.10
0.03-0.35
MACHINABILITY
Copper Alloy UNS No.
Machinability Rating
Density(lb / in 3 at 68 °F)
C52100
20
0.318
MECHANICAL PROPERTIES
Mechanical Properties according to ASTM B139/B139M-12(2017)

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
80
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
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 Elastic in Tension
16000 ksi
110310 MPa
Modulus of Rigidity
6400 ksi
41370 MPa
FABRICATION PROPERTIES
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
Treatment
Minimum*
Maximum*
Annealing
900
1250


SPEC SHEET


SIGN UP FOR OUR
Newsletter
Get the Latest Randall News
SIGN UP