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Sizes under 100 lb/yd (49.6 kg/m) rail are usually for lighter duty freight, low use trackage, or light rail. Track using 100 to 120 lb/yd (49.6 to 59.5 kg/m) rail is for lower speed freight branch lines or rapid transit ; for example, most of the New York City Subway system track is constructed with 100 lb/yd (49.6 kg/m) rail.
The American gauges converged, as the advantages of equipment interchange became increasingly apparent. Notably, all the 5 ft ( 1,524 mm ) broad gauge track in the South was converted to "almost standard" gauge 4 ft 9 in ( 1,448 mm ) over the course of two days beginning on 31 May 1886. [ 21 ]
In the recent past, HSS was commonly available in mild steel, such as A500 grade B. Today, HSS is commonly available in mild steel, A500 grade C. Other steel grades available for HSS are A847 (weathering steel), A1065 (large sections up to 50 inch sq made with SAW process), and recently approved A1085 (higher strength, tighter tolerances than ...
Some of the new railways being built in Africa allow for double-stacked containers, the height of which is about 5,800 mm (19 ft 0 in) depending on the height of each container 2,438 mm (8 ft 0 in) or 2,900 mm (9 ft 6 in) plus the height of the deck of the flat wagon about 1,000 mm (3 ft 3 in) totalling 5,800 mm (19 ft 0 in).
Guest Keen Baldwins Iron and Steel Company Ltd.: Briton Ferry Steelworks, [67] Glyn Valley Tramway: 737 mm 2 ft 5 in: England: St. Michael's Mount Tramway [68] 740 mm: 2 ft 5 + 1 ⁄ 8 in: Luxembourg: Minière et Métallurgique de Rodange mine railway [69] 750 mm: 2 ft 5 + 1 ⁄ 2 in: See 750 mm gauge railways: 760 mm: 2 ft 5 + 15 ⁄ 16 in ...
Haining railway station's platform includes both low and high platforms. China Railway platforms are classified into the following categories of "low" 380 mm (15.0 in), "medium" 550 mm (21.7 in), "high" 760 mm (29.9 in) and "ultra high" 1,250 mm (49.2 in) (the latter two for most new and rebuilt platforms).
The vast majority of North American railroads are standard gauge (4 ft 8 + 1 ⁄ 2 in / 1,435 mm).Exceptions include some streetcar, subway and rapid transit systems, mining and tunneling operations, and some narrow-gauge lines particularly in the west, e.g. the isolated White Pass and Yukon Route system, and the former Newfoundland Railway.
The austenizing temperature, the temperature where a steel transforms to an austenite crystal structure, for steel starts at 900 °C (1,650 °F) for pure iron, then, as more carbon is added, the temperature falls to a minimum 724 °C (1,335 °F) for eutectic steel (steel with only .83% by weight of carbon in it).
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