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QQ-C-390B Superseded by ASTM B Specifications

  • Writer: Admin
    Admin
  • Feb 2, 2018
  • 1 min read

Updated: Jan 10


ASTM Copper Alloys - Anchor Bronze and Metals

QQ-C-390B type 3 has been superseded by ASTM B505

QQ-C-390B type 2 has been superseded by ASTM B271

Notice of Cancellation for QQ-C-390B, Notice 2, October 28, 1993.

QQ-C-390B, dated December 12th, 1983 is hereby cancelled. Future procurement's for this material should refer to the appropriate portions of:

ASTM B505, Copper-base Alloy Continuous Castings

ASTM B271, Copper-base Alloy Centrifugal Castings

 
 
 

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

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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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