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C90300 (SAE 620) Tin Bronze
CDA 903, CA90300, SAE 620, NAVY G, ALLOY D5, Cu88 Sn8 Zn4, ASTM B505, ASTM B271, ASTM B584, ASTM B143-1B, QQ-C-390 B, TYPE 1, TYPE 2, TYPE 3, 88-8-0-4, BRONZE

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.

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C90300 (SAE 620) NAVY G Tin Bronze is a high wear resistant bronze that provides good mechanical properties and excellent corrosion resistance to dezincification. This proven alloy is used in wide applications and has an excellent rating for soldering and offers good brazing. C90300 (SAE 620) Bronze conforms to cast specifications ASTM B505, ASTM B271 and ASTM B584.

 

C90300 (SAE 620) Navy G Bronze is used for bearings, bushings, piston rings, valve components, seal rings, steam fittings and gears.

C90300 Navy G 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. 

Tin prices jumped to a record level due to a severe, ongoing global supply squeeze from mine disruptions (DRC, Myanmar, Indonesia) and increasing demand driven by its critical role in electronics (solder), green energy tech, and packaging, creating a significant market deficit and attracting speculative investment. Supply chain issues, including export permit delays and political instability in key producing regions, combined with growing recognition of tin's necessity for the energy transition, fueled a rally to multi-year highs in late 2025 and early 2026. 

Nickel prices are rising due to anticipated supply cuts from major producer Indonesia, tighter quotas, increased demand from stainless steel and EV battery sectors (despite some LFP shifts), speculative buying, and broader market strength in metals, with investors reacting to policy signals and potential disruptions.

metals@anchorbronze.com

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