Alloy Grade UNS: C90300 – Copper-Tin Alloys 

  • Overview

    C90300 is a copper-tin alloy that features high tensile, yield, and compressive strength as well as wear resistance. The alloy contains 88% copper, as well as 8% tin and 4% zinc. Also known as Navy G, this alloy is great for heavy-load components. It is great for soldering and brazing.

  • Typical Uses

    Bearings, bushings, gears, hydraulic parts, piston rings, steam fittings, steel mill nuts, worm gears.

  • MetalTek Grade

    NAVY G

Similar Specifications

Cast UNS: C90300

Cast Grade: C90300

Cast ASTM: B271, B584

Military/AMS: MIL-C-15345-8

Other Specifications: SAE 620

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: n/a

Chromium: n/a

Manganese: n/a

Iron: n/a

Copper: 88

Nickel: n/a

Lead: n/a

Tin: 8

Silicon: n/a

Zinc: 4

Minimum Mechanical Properties

Tensile, ksi


Tensile, MPa


Yield, ksi


Yield, MPa