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C67300 Silicon Manganese Bronze
CDA 673, CA67300, ASTM B249, SAE J461, SAE J463, MIL STD 2154 CLASS A, ASTM E 2375

*Mechanical Properties are typical for 2" rod As Extruded

**Test values are nominal approximations and depend on specimen size and orientation.

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 ASTM specification references.

C67300 SILICON MANGANESE BRONZE is a high strength leaded silicon manganese bronze with good bearing qualities. This alloy maintains high impact resistance with excellent machinability making it well suited for clutch bearings, shaft bushings, sleeve bearings, thrust bearings, pump parts, drive shafts, bearing pins, wear plates, gears and cams. Resists squashing out under high loads and extreme wear applications. C67300 Manganese Bronze conforms to specifications SAE J461, SAE J463

C67300 Manganese Bronze
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What's Driving
Metal Prices

Factors creating the on-going surge in copper prices and base metal prices.

The U.S. imposed a 50% Section 232 tariff on the copper content of semi-finished and derivative copper products, effective August 1, 2025. These tariffs aim to bolster domestic production but create complexities for businesses in pricing, sourcing, and compliance, affecting global copper markets. 

In addition copper costs are soaring due to massive demand from the energy transition (EVs, renewables, grid) and AI data centers colliding with slow mine supply growth, production disruptions (labor, technical issues), aging mines, and government policies like tariffs, creating a structural supply deficit. 

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