... , 1J89, 1J90, 1J91 Alloy:1J87, 1J88, 1J89, 1J90, 1J91Availability:High Permeability Alloys with High Hardness and Electrical Resistance are available in the cold ... kind of alloy:Applications:They are usually applied for producing: High Permeability Alloys with High Hardness and High Electrical Resistance