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[Hardness properties]
1.Rails shall be produced as specified by the purchaser within the limits found in Table 3 and Table 4.
2.The Brienll hardness test shall be performed on a rail,a piece of rail at least 6 in.(152 mm) long cut from a rail of each heat of steel or heat-treatment lot,or from a ground/milled transverse sample cut from the 6-in.piece.The test shall be made on the side or top of the rail head after decarburized material has been removed to permit an accurate determination of hardness.Alternately,the test may be made on the prepared transverse ground/milled sample 3/8 in.from the top rail surface.
3.The test shall otherwise be conducted in accordance with Test Method E10.
4.If any test result fails to meet the specifications,two additional checks shall be made on the same piece.If both checks meet the specified hardness,the heat or heat treatment lot meets the hardness requirement.If either of the additional checks fails,wto additional rails in the heat or kot shall be checked.Both of these checks must be satisfactory for the heat or lot to be accepted.If any one of these two checks fails,individual rails may be tested for acceptance.
5.If the results for off-line head hardened rails and fully heat treated rails fail to meet the requirements of 7.1,the rails may be retreated at the option of the manufacturer,and suchrails shall be retested in accordance with 7.2 and 7.3.
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