Alloy Grade – UNS: C90800 Copper-Tin Alloy

  • Overview

    C90800 is a high-performance copper-tin alloy, with high tensile, yield, and compressive strength as well as wear resistance. This alloy is best served for high strength needs or heavy load requirements. Also known as AGMA CL A, this alloy contains 87.8% copper. It is renowned for its exceptional tensile, yield, and compressive strength, making it ideal for demanding applications. Comprising 87.8% copper, this alloy exhibits excellent wear resistance and is compliant with key regulations.

  • Typical Uses

    Worm gears and steel mill nuts.

  • MetalTek Grade

    AGMA CL A

  • Poured At:

    Wisconsin Centrifugal Division

Similar Specifications

Cast UNS: C90800

Cast Grade: C90800

Cast ASTM: B427

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: n/a

Chromium: n/a

Manganese: n/a

Iron: n/a

Copper: 87.8

Nickel: n/a

Lead: n/a

Tin: 12

Silicon: n/a

Zinc: n/a

Other: P 0.2

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Frequently Asked Questions

Gear bronze is a high-strength bronze alloy formulated for high-load applications in gears, bushings, and heavy machinery components.

Used in worm gears, bushings, bearings, and wear plates in industrial and marine environments requiring high load-bearing performance.

It offers high wear resistance, excellent machinability, and superior strength, making it ideal for high-stress, high-friction components.

Compared to phosphor or aluminum bronze, gear bronze has better load-carrying capacity and wear performance, especially in heavy-duty gear systems.