Brinell hardness tester with a diameter of 10 mm and a load of 500 kg gives an impression with a diameter of 1.62 mm in a steel alloy. 1-Calculate the Brinell hardness (HB) in the steel alloy.  2-What will be the diameter of the impression in the steel alloy when this has a Brinell hardness of 450 with a load of 500kg.

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