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AMM aluminum alloys pricing notice

Aug 26, 2013 | 01:28 PM |

Tags  aluminum alloy, aluminum, primary aluminum, aluminum prices

Beginning June 5, 2013, AMM has launched new daily estimated producer spot selling prices for two key primary aluminum alloys: C355.2 and A356.2. The new prices differ from AMM’s discontinued 355 (355.2) and 356 (356.2) aluminum alloy prices, as these new prices are updated daily using a formula-based methodology intended to better reflect moves in the LME aluminum price. The new methodology has been developed to provide a fair, transparent and objective representation of the market.


The newly launched C355.2 and A356.2 alloyed aluminum ingot prices are quoted in U.S. dollars per pound. The prices represent a domestic producer estimated spot price f.o.b. mill.

Pricing calculation

The C355.2 and A356.2 prices are calculated daily using the following formula: LME cash aluminum official price (ask) + AMM Midwest aluminum premium (average) + AMM alloy surcharge assessment.

AMM’s reporting staff assesses the Midwest aluminum premium once a week and assesses the alloy surcharge once a month. Assessments are based on actual transaction data collected from buyers and sellers in the marketplace. Where insufficient transactions have taken place in the market, AMM reserves the right to include assessments, bids and offers from market participants in its assessments of the premium and surcharge.

Historical data

AMM has published historical data on the newly launched prices for the months of March, April, May and June to date using the new methodology. The historical data can be found online at Monthly averages for March, April and May are also available online.


If you have any questions on the newly launched prices or the discontinued prices, or on how to locate and use the historical data, please contact

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