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AlNiCo magnets basically consist of aluminum, nickel, cobalt, copper, iron and titanium. Most AlNiCo magnets are manufactured using typical foundry casting techniques,where the motten alloy is poured into sand molds,AlNiCo is hard and brittle,and is not suitable for drilling,tapping or conventional machining operations. The maximum working temperature can be as high as 400 oC for these magnets. So they are still widely used in applications such as instruments, meters, which these kind of applications need very stable temperature properties.