根据wiki介绍，2$硬币是铝铜鎳的合金，磁性主要是防伪：The Mint states that multiply-plated steel technology,already used in Canada's smaller coinage, produces an electromagnetic signature that is harder to counterfeit than that for regular alloy coins; also, using steel provides cost savings and avoids fluctuations in price or supply of nickel
-kanacuul(DragonWell);
2016-11-22{237}(#10442098@0)