Hitachi

Hitachi Metals America

Work Roll

Hitachi
Symbol
Material Substance Hardness
Shore D
Grindability
FZ-3 1.5%C-12%Cr Cold Die Steel 80-85 + + + +
Excellent
FZ-11 8%Cr Cold Die Steel 83-88 + + + +
Excellent
FZ-12 8%Cr Semi High Speed Steel 87-92 + + +
Best
FZ-9W High Speed Steel 87-92 + +
Better
FZ-70 Super Hard High Speed Steel 92-97 + + +
Best
FZ-72 Super Hard High Speed Steel 92-97 + + +
Best
FZ-7M High Speed Steel with VC Type Carbides 88-93 +
Good

Intermediate Roll

Hitachi
Symbol
Material Substance Hardness
Shore D
Wear
Resistance
FZ-3 1.5%C-12%Cr Cold Die Steel 77-82 + + +
Best
FP-7 Hot Die Steel 76-81 +
Good
FP-8 Hot Die Steel 78-83 + +
Better
FP-11 Cold Die Steel 84-89 + + +
Best
FZ-6 Semi High Speed Steel 83-88 + + +
Best
FZ-9W High Speed Steel 87-92 + + + +
Excellent