Previous studies have shown alternative steels may improve the performance of tank cars when they are involved in railroad accidents. ASTM A841 - Grade C Class 2 microalloyed steel was selected as a candidate for replacing TC-128B steel that is currently used in the manufacture of tank car heads and shells. A first step in evaluating the manufacturability of tank cars using this steel was to check its head forming capabilities. The material's sensitivity to heating was evaluated and a limit of 1300 deg F was established. Warm and cold head forming produced a physically acceptable product but metallurgical problems were discovered. Segregated bands with martensite streaks produced erratic energy absorption as determined through Charpy tests. Segregation and property variation must be improved in the as-rolled condition before further consideration can be given ASTM A841 - Grade C Class 2 material. Other materials or strategies may be exercised as well.
Tank car steel investigations
Untersuchung von Stählen für Tankwagen
2004
6 Seiten, 3 Bilder, 12 Quellen
Conference paper
English
Investigations into Tank Venting for Propellant Resupply
AIAA | 2002
|Vanderbilt steel frame tank car
Engineering Index Backfile | 1904