Alloy Grade UNS: C86300 Copper-Zinc Alloys

  • Overview

    C86300, often called manganese bronze, is a high-strength, high-hardness copper-zinc alloy designed for demanding applications. Its composition, which includes additions of aluminum and manganese, contributes to its impressive tensile strength of around 760 MPa, surpassing that of the similar C86200 alloy. This makes C86300 particularly well-suited for heavy-load applications where components experience significant forces. While not heat treatable, this alloy offers a good balance of strength, wear resistance, and corrosion resistance, making it a valuable choice for applications requiring robust performance and durability.

  • Typical Uses

    Cams, fittings, flanges, forming rolls and dies, ordnance parts, shaft sleeves, steel mill nuts, worm gears. Other uses include heavy-load bearings, large valve stems, and hydraulic cylinder parts.

  • MetalTek Grade

    HIGH TENSILE

  • Poured At:

    Wisconsin Centrifugal Division

Similar Specifications

Cast UNS: C86300

Cast Grade: C86300

Cast ASTM: B271, B584, B148

Military/AMS: MIL-C-15345-6

Other Specifications: SAE 430B

Typical Chemical Composition (% by wt.)

Aluminum: 6

Carbon: n/a

Chromium: n/a

Manganese: 3

Iron: 3

Copper: 63

Nickel: n/a

Lead: n/a

Tin: n/a

Silicon: n/a

Zinc: 25

Minimum Mechanical Properties

Brinell 3000 KG Typical:

0

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Frequently Asked Questions

Manganese bronze is a strong, corrosion-resistant bronze alloy made from copper, zinc, manganese, and iron, used in marine and heavy-duty applications.

Used in ship propellers, winches, gears, valve stems, and other parts exposed to high loads and saltwater environments.

Manganese bronze offers excellent strength, wear resistance, and corrosion resistance, making it ideal for mechanical and marine applications.

Yes, it performs well in marine environments due to its corrosion resistance and durability under load-bearing conditions.

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Non-ferrous alloys are, literally, materials that are not iron-based. While others may provide non-ferrous materials of other materials, the MetalTek family of non-ferrous alloys are copper-based. In general, these materials deliver high strength, and excellent wear and corrosion resistance. They are often found in marine applications and also bushing, bearing, and gear environments.
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Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%.
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Specialty Alloys comprise a broad group of materials that deliver properties for more demanding applications, use more exotic or expensive materials, or require special processes to manufacture. Where standard materials may not offer desired performance, specialty alloys (including those that are modified further) may be a sensible selection.