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B:18-19，AL <1.5，SI<1.0，P<0.050，C<0.15，S<0.010。

FIELDS OF USE: steel-making, electric power, electronics, home appliances, communications, aviation, aerospace, navigation, military industry, etc.

MAIN USAGE: steel-making, permanent magnet materials (Ndfeb) main raw materials

USE FEATURES: to increase hardness, toughness, wear resistance