C90300 Tin Bronze Alloy

When you need an alloy that can work in high-load and low-speed applications, you’ll find the ideal solution with C90300. This lead-free cast bronze alloy has high tin content and copper materials. This combination makes the alloy more durable than copper and gives it excellent wear properties.

C90300 earned its nickname as Navy G Bronze because it has a high resistance to corrosion. So, it works well in nautical applications. Other mechanical applications include:

  • Bronze Bearings
  • Bronze Bushings
  • Bronze Gears
  • Bronze Piston Rings
  • Bronze Pump Bodies
  • Bronze Seal Rings
  • Bronze Steam Fittings
  • Bronze Worm Gears

Diversified Bronze has C90300 Tin Bronze in a variety of diameters, shapes, and lengths in either solid or tube lengths.

Technical details

C90300 is made up of 89% copper and 11% tin. The best welding techniques include:

  • Brazing
  • Carbon Arc
  • Coated-metal arc
  • Gas-shielded arc
  • Oxyacetylene
  • Soldering

C90300 Tin Bronze Alloy Properties

Physical
Property
Imperial
Metric
Density
0.316 lb/in
8.77 g/cm3
 
Mechanical
Property
Imperial
Metric
Brinell Hardness
70
70
Tensile strength
45,000 psi
310 MPa
Yield strength
21,000 psi
145 MPa
Fracture strain
30%
30%
Machinability
30
30
Charpy impact
14 ft. lb.
19.0 J
Elastic modulus
16969 ksi
117 GPa
Poisson’s ratio
0.34
0.34
 
Thermal
Property
Imperial
Metric
Thermal expansion co-efficient (@20-177°C/68-351°F)
10.0 µin/in°F
18.0 µm/m°C
Thermal conductivity (@20.0°C/68°F)
514 BTUin/hr.ft².°F
74.0 W/mK