Tender For corrigendum : procurement of matching material towards liners replacement / reversal works of units 5&6 mills, bm,stage iii - bolt;head typeliner bolts style 2 -> size :m27 x 3 x 180mm long , material : en-8 forged steel stress relieved with the following chemical composition: c= 0.45%, mn=0.85%, si=0.25%, s=0.03%, p=0.026% as per astm a 307 standards , self locking nut 0018-36612 of size: m27 x 3mm suitable for m27 bolts, material: en-24t & surface treatment with zinc bichromate as per astm a 563 & astm f 2329 standards , neoprene rubberrings for special steel washers for ball tube mills, requirements :- id = 26.5mm, od = 39.5mm with special projection provided at one end to sit in the groove provided in the steel washers, thickness = 4.5mm, min torque = 45 kgfm, neoprene rubber should withstand a temp. upto 150 deg.c and should be flexible, c/s - square, shore hardness - a85 to 95 as per astm d 3468 standards , reconstituted non metallic cork sheet for use as packing material in between mill liner and mill shell of ball tube mills. sheet size: 0.9x0.9 mtrs x 3.17mm thickness.the cork sheet shall withstand a temperature of 150 to 200 deg.centigrade. as per is 4253 (part 2)type c / rc - 70c standards , special steel washers suitable for m27 bolts, od : 55mm . material specification : en-8 steel with cadmium coated. chemical composition: c= 0.37%, mn=0.71%, si=0.28%, s=0.02%, p=0.023% as per astm f 959 standards
08 May, 2025
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