Producer of custom machined parts, specializing in bronze and other popular alloys for your manufacturing needs.
COPPER-BASED ALLOYS
C51000
CAST C51000
Phosphor bronze alloys such as C51000, also known as C510, 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 5% A
TEMPERS: H04 Half Hard, H08 Spring
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
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%
Rem.
0.05
4.20-5.80
0.30
0.10
0.03-0.35
MACHINABILITY
Copper Alloy UNS No.
Machinability Rating
Density(lb / in 3 at 68 °F)
C51000
20
0.320
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
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


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 1/4" 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
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 Elastic in Tension
16000 ksi
110310 MPa
Modulus of Rigidity
6000 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
Excellent
Capacity for Being Hot Formed
Poor
Machinability Rating
20
THERMAL PROPERTIES
Treatment
Minimum*
Maximum*
Annealing
900
1250


SPEC SHEET


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