Bessemer process

Open hearth process

Duplex process

Electric process

basic Bessemer and acid open hearth processes

acid Bessemer and basic open hearth processes

acid Bessemer and acid open hearth processes

basic Bessemer and basic open hearth processes

alloy and carbon tool steel

magnet steel

high speed tool steel

all of these

Bessemer process

Open-hearth Process

Electric process

L-D process

make the steel tougher and harder

make the steel of good bending qualities

raise the yield point

all of these