Producer of custom machined parts, specializing in bronze and other popular alloys for your manufacturing needs.
BRONZE BASED ALLOYS
C90700
CAST C90700
Tin bronze alloys, such as C90700, are typically found in gear, high-strength bushing and bearing applications where low speeds and heavy loads are present. Other high-strength applications for these alloys include pump impellers, piston rings, steam fittings and valve bodies. C908 tin bronze castings are utilized in movable bridge components, turntables for bridges and other structures for fixed and expansion bearings with slow or intermittent movement with heavy loads.
INFORMATION
PRODUCT DESCRIPTION: Tin Bronze
SOLIDS: 1/2" to 10" O.D.
TUBES: 1” to 16” O.D.
RECTANGLES: Up to 20”
STANDARD LENGTHS: 144”
SHAPE/FORM: semi-finished, mill stock or near-net shapes, anode, bar stock, billet/bloom, squares, hex, plate, profile or structural shape, flats/rectangular bar
TYPICAL USES
INDUSTRIAL: bearings, bearings for heavy loads and relatively low speeds, gear boxes, gears, restaurant equipment, speed reducers, valve bodies, worm gears, worm wheels
SIMILAR OR EQUIVALENT SPECIFICATION
CDA
ASTM
SAE
AMS
Federal
Military
Other
C90700
B505 B505M
65 J461 J462
4845
Tin Bronze, 65
CHEMICAL COMPOSITION
Cu%1
Pb%
Sn%
Zn%
Fe%
P%
Ni%1,2
Al%
S%
Sb%
Si%
88.00-90.00
0.50
10.00-12.00
0.50
0.15
1.50
0.50
0.005
0.05
0.20
0.005
MACHINABILITY
Copper Alloy UNS No.
Machinability Rating
Density(lb / in 3 at 68 °F)
C90700
20
0.317
MECHANICAL PROPERTIES
Tensile Strength, min
Yield Strength, at 0.5% Extension Under Load, min
Elongation, in 2 in. or 50 mm min
Brinell Hardness (500 kg load)
Remarks
ksi
MPa
ksi
MPa
%
typical BHN
40
276
25
172
10
102
PHYSICAL PROPERTIES
US Customary
Metric
Melting Point - Liquidus
1830 °F
999 °C
Melting Point - Solidus
1528 °F
831 °C
Density
0.317 lb/in3 at 68 °F
8.77 gm/cm3 at 20 °C
Specific Gravity
8.77
8.77
Electrical Conductivity
10% IACS at 68 °F
0.056 MegaSiemens/cm at 20 °C
Thermal Conductivity
40.8 Btu/sq ft/ft hr/°F at 68 °F
70.6 W/m at 20 °C
Coefficient of Thermal Expansion 68-572

10.2 · 10-6 per °F (68-212 °F)

18.4 · 10-6 per °C (20-100 °C)

Specific Heat Capacity
0.09 Btu/lb/°F at 68 °F
377.1 J/kg at 20 °C
Modulus of Elastic in Tension
15000 ksi
103400 MPa
Magnetic Permeability
1
1
FABRICATION PROPERTIES
Technique
Suitability
Soldering
Excellent
Brazing*
Good
Oxyacetylene Welding
Fair
Gas Shielded Arc Welding
Fair
Coated Metal Arc Welding
Fair
Machinability Rating
20
THERMAL PROPERTIES
Treatment
Value*
Time**
Stress Relief
500
Solution Treatment
0


SPEC SHEET


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