Iron casting Rectangular Manhole Covers & Frames square locking manhole cover with shockproof ? ? Details of the product: 1.Material & Standard:grey iron,ductile iron,malleable iron,carbon steel,alloy steel(high Manganese steel,high Chromium steel and others),Stainless steel,Aluminum alloy,Copper alloy; JIS,DIN,BS,GB,ASTM.? 2.Moulding processing:Green sand,Resin sand,Waterglass sand,Lost wax/Silicon sol or Die casting. 3.Melting facilities:Cupola furnace,medium frequency induction electric furnace or electric arc furnace. 4.Casting Inspection facilities:Direct-reading spectrum instrument,metallographic analysis,magnetic particle inspection,ultrasonic?inspection,X-ray inspection,mechanical properties inspection. 5.Heat treatment facilities:Aging oven,Electric furnace,Normalizing,Quenching and Tempering equipments. 6.Surface treatment:Shot blast cleaning,polishing,Chrome plating,Zinc plating,powder coating and others. 7.Machining facilities:CNC centres,NC lathes,NC milling machines,NC boring machines,drilling machines and other common machines. 8.Inspection facilities:CNC 3-D inspecton facilities and others. 9.Industrial categories:Tractor,Heavy-duty truck?industry,Car industry,Farm machinery,Construction engineering machine?industry,Electricity power industry,Elevator industry,Valve industry,General machine industry and others. 10.?Part Unit weight range:? ???? For grey iron casting:?up to 15000kgs; ???? For?ductile iron casting:up to 4000kgs; ???? For high manganese steel casting:up to 5000kgs; ???? For carbon steel & alloy steel casting:up to 10000kgs; ???? For Aluminum/copper alloy die casting:from 8g up to 12kgs; ???? For Investment/lost wax?casting:up to 80kgs; 11.Representative product:machine bed,machine table,bearing stand,housing,casing,cover,valve body,pump body,big ring gear,big pulley,big sheave,bolster,frame,rear frame,front frame,engine block,mill-ball,hammer,jaw plate,bucket tooth,front idler,excavator sprocket,link rod,Bucket link rod,barre liner,grate plate,top grate,open grate,front wall and rack etc. ? ? Factory Information: ? ?The producing procedure:? ? Contact Us Custom?Fabrication?Service ? PLEASE?CONTACT?US?FOR?MORE?INFORMATION?! We?hope?to?be?your?long?-time?professional?supplier?for?your?parts. If?you?have?any?question,?pls?feel?free?to?let?me?know. Look?forwards?to?your?kind?inquiry,?we?will?response?to?you?in?24?hours. ? ?