Home>ASTM Standards>ASTM A759-10(R2017) pdf free download

ASTM A759-10(R2017) pdf free download

ASTM A759-10(R2017) pdf free download.Standard Speci fication for Carbon Steel Crane Rails
4. Manufacture
4.1 Melting Practice—The steel shall be made by any of the following processes: basic-oxygen or electric-furnace. 4.1.1 The steel may be cast by a continuous process, or in ingots. 4.2 Discard—A sufficient discard shall be made to secure freedom from injurious segregation and piping. 4.3 Control Cooling: 4.3.1 Rails shall be control cooled in accordance with the following procedure, except when produced from vacuum- degassed steel or control cooled blooms, in which case the rails may be air cooled and 4.3.2 – 4.3.6 are not applicable. 4.3.2 All rails shall be cooled on hot beds or runways until full transformation is accomplished, and then charge immedi- ately into the containers. In no case should the rail be charged below 725°F (386°C). 4.3.3 The temperature of the rails before charging shall be determined with reliable equipment at the head of the rail at least 12 in. (305 mm) from the end. 4.3.4 The cover shall be placed on the container immedi- ately after completion of the charge and shall remain in place for at least 10 h. After the removal or raising of the lid of the container, no rails shall be removed until the temperature of the top layer of rails has fallen to 300°F (149°C) or lower. 4.3.5 The temperature between an outside rail and the adjacent rail in the bottom tier of the container at a point not less than 12 in. (305 mm), nor more than 36 in. (914 mm), from the rail end shall be recorded. This temperature shall be the control for judging rate of cooling.4.4 High Strength Rails—When specified in accordance rails will be permitted. 6.4 End Finish: 6.4.1 Rails shall be milled, abrasive wheel cut, or ground to length, with a variation in end squareness of not more than ⁄ 32 with Supplementary Requirement S1, all or a portion of the quantity of rails ordered shall be high strength. 4.5 Chamfering— When speci fied in accordance with Supplementary Requirement S2, the ends of rails shall be chamfered. 4.6 Ends Prepared for Electric Arc Welding—When rails are to be joined by electric arc welding, special end preparation may be available from individual manufacturers as may be developed in accordance with Supplementary Requirement S3.
5. Chemical Requirements
5.1 Heat or Cast Analysis—An analysis for each heat or cast of steel shall be made by the manufacturer to determine the percentage of the elements specified in Table 1. The analysis shall be made from a test sample taken preferably during the pouring of the heat or cast and shall conform to the require- ments in Table 1. 5.2 When ladle tests are not available, finished material representing the heat may be product tested. The product analysis allowance beyond the limits of the specified ladle analysis shall be within the limits for product analyses speci- fied in Table 2. 5.3 Alternate chemistries may be allowed when agreed to by purchaser and supplier.
7. Workmanship, Finish, and Appearance
7.1 All rails shall have a workmanlike finish and be free of various imperfections that may detrimentally affect their suit- ability for the service for which they are intended. 7.2 Rails shall be straightened cold in a press or roller machine to be commercially straight, as determined by visual inspection. 7.3 Deviations in the vertical and horizontal alignment throughout the length of the rail shall be uniform. Sharp deviations in either direction shall not be acceptable. 7.4 Deviations of the lateral (horizontal) line in either direction at the rail ends shall not exceed a maximum ordinate of 0.040 in. (1 mm) in 3 ft (0.9 m). 7.5 All ordinate determinations shall be made on the con- cave side, between the rail surface and the straightedge. 7.6 Rails presented for inspection that do not conform to the requirements of 7.1 – 7.4 may be reconditioned by the manufacturer.

Maybe you like

Standards Tags