... : 5-50MM, 90%min Chemical Composition: B,Si,C,Al,P,S Ferro boron is applied to iron making, foundry and ... low volume of boron to improve hardenability obviously to replace a great deal of alloy element. In addition, it can improve ... bagDelivery Detail:25days from reiveing L/C or TT deposit A grade Ferro Boron SIZE:5-100MM 90%MIN