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What is the amount of boron used in HPF steel?(a) Less than 0.003%(b) Less than 0.007%(c) Less than 0.009%(d) Less than 0.057%The question was posed to me in unit test.The question is from Inverse Rate Curves for Steel in division Heat treatment of Metals and Alloys of Casting-Forming-Welding II

Answer»

Right choice is (a) LESS than 0.003%

EASY explanation: The BORON content which is used in HPF steel is extremely less in percentage composition. The amount of boron used in TERMS of percentage WEIGHT is less than 0.003%.



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