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              Tin Bronze Alloy C90300 Navy G

Tin Bronze Alloy C90300 Navy G   Copper Alloy No. C90300   Tin Bronze Alloy C90300 Navy G

Tin Bronze Alloy D5 , Navy G , CDA 903 , SAE 620

ASTM B 505 , ASTM B 271 , QQ-C-390 B Alloy Type 2 & 3
Chemical Composition % by weight
Element Nominal Minimum Maximum
Aluminum - - .005
Antimony - - .20
Copper 88 86 89
Iron - - .20
Lead - - .30
Nickel - - 1
Phosphorus - - .05
Silicon - - .005
Sulfur - - .05
Tin 8 7.5 9
Zinc 4 3 5
Applications
Bearings, bushings, pump impellers, piston rings, valve components, seal rings, steam fittings, gears.
Mechanical Properties
M07 - As Continuous Cast
Hardness Brinell Hardness (500 kg load) 70
Tensile Strength** KSI 45
Yield Strength ** KSI (0.5% Ext. under load) 21
Elongation** % in 2 inch 30
**Test values are nominal approximations and depend on specimen size and orientation.
Physical Properties
Thermal Conductivity BTU/ (sq ft-ft-hr-F) 43.2
Specific Heat BTU/lb/ºF @ 68F .09
Thermal Expansion Per °F from 68 F to 340 F .000010
Density lb/cu in @ 68 F .318
Electrical Conductivity* (Annealed) % IACS @ 68 F 12
Modulus of Elasticity KSI 14,000
*Volume basis
Fabrication Practices
Stress relieving temperature 500 F or 260 C
Time at temperature 1 hour per inch of section thickness
Responds to heat treatment No
Machinability rating (Free Cutting Brass=100) 30
Suitability for being joined by: Soldering/Excellent
Brazing/Good*
Oxyacetylene Welding/Fair
Gas Shielded Arc Welding/Fair
Coated Metal Arc Welding/Fair
*Since brazing is performed at temperatures within the hot-short range, strain must be avoided during the brazing and cooling of this alloy.


The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.

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Tin Bronze Alloy C90300 Navy G

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Tin Bronze Alloy C90300 Navy G


Nickel Aluminum Bronze C95500 Nickel Aluminum Bronze C95500 Tin Bronze Alloy C92200 Navy M Tin Bronze Alloy C92200 Navy M
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