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number will be determined by the current Method Test for Brinell Hardness of <br />Metallic Materials, ASTM Designation E10. <br />d. A chemical analysis of each melt of steel shall be made available by the <br />manufacturer to determine the percentages of the elements specified. <br />The cutting edges shall be of the length specified on the bid form and shall be double <br />bevel, curved, 5/8 inch or 3/4 inch thick, and 6 inch or 8 inch wide after forming. The <br />bevel shall be 1 inch in length and the cutting edge shall have a radius curvature of 7 <br />1/2 inch to 10 inch. The finished blade section will be given a coat of rust resistant <br />paint and shall be free of warpage and longitudinal deviation. The cutting edges for <br />5/8 inch blades and 3/4 inch blades shall be punched with 11/16 inch square holes <br />with countersink to receive 5/8 inch diameter #3 plow bolt. Hole punching to be <br />"standard highway punch" (end 2 holes on each end of the blade on 3 inch centers, <br />and the remaining holes 12 inch spaced center to center across the middle of the <br />blade) as per the diagram below. <br />3" <br />..p.......................... a ......................... a....................... n.... 0.....F <br />Ver. 13 — 6101115 <br />