Alloy Cast Steel RollsAlloy Cast Steel Rolls AKA. AS rolls belong to eutectoid steel and hypereutectoid steel. Alloy content greater than 0.8%,Website:http://www.kdroll.com, carbon content 0.4~1.3, Cr, Ni, Mo, V is added, matrix structure goes through heat treatment of normalizing and tempering, becoming sorbite and tempered sorbite.This type of roll has good strength, normally used for blooming and slab mills, rail mill roughing stands, section and bar wire roughing stands, etc.Alloy steel rolls normally employ monoblock casting process (single pour):Melting-Casting-Heat treatment-Machining- Flaw detection- Finished productsPackaging:Following are 4 steps of packing Kaida mill rolls:Step 1.-Coated with hard film rust preventive oil-Intention: To prevent rusting from humidity Step 2.-Covered with blue waterproof cloth Step 3.-Blanked with grey-color polypropylene hollow sheet outer packingStep 4.-Sitting on multi-layers steel shelf instead of wooden pellet-Pros of steel shelf: Eco-friendly, saving trees, recycling..Single layerThree layers stand Package for SleevesLast but not least: Storage for mill rolls-We Kaida Roll suggest mill rolls should be stored in non-heating environment, neck sitting on a stand.   -Regular low tempering is also recommended in order to extend mill roll life span.