https://peertube.dngr.us/videos/watch/7d276661-f6b5-40d2-8333-683beee45451 Help us preserve, scan and post more rare and endangered films on Patreon: https://www.patreon.com/PeriscopeFilm Join this channel to get access to perks: https://www.youtube.com/channel/UCddem5RlB3bQe99wyY49g0g/join Website: www.PeriscopeFilm.com This United States Steel promotional film, "Semifinished Steel," (1955) is one of the "Making, Shaping and Treating Steel" series. It details the process of transforming molten steel from an open-hearth furnace into various semifinished steel products like ingots, blooms, slabs, and billets. 0:00 Main titles. Molten steel from an open-hearth furnace is ready to be cast into solid blocks called ingots. 0:49 The molten steel is poured ("teemed") into large, cast-iron molds, each holding about 13 tons of steel. The film shows different types of molds, including "big end down" and "big end up" molds, as well as those with "hot tops." 1:38 Small amounts of aluminum are added during teeming to control gas released as the steel cools. 1:57 Once the steel solidifies, the ingots are taken to a stripping bay, where a hydraulic plunger pushes them out of their molds. 2:34 Before being rolled, the ingots are reheated in a furnace called a soaking pit to a proper, uniform rolling temperature. 3:08 The film explains how ingots are rolled into various shapes. Many are rolled into squarish sections called blooms. 3:17 The film shows different types of rolling mills, including a two-high reversing mill and a three-high mill, which pass the steel back and forth between grooved rolls to form the blooms. 3:53 The film then introduces slabs, which are rolled from ingots using horizontal and vertical rolls that shape the edges. 4:11 A high-lift mill is introduced as a versatile option that can roll both blooms and slabs. 4:54 A single operator in a "pulpit" controls the entire rolling process, using massive seel manipulators to turn the ingots between passes. 5:38 The film explains that the rolling process not only squeezes and lengthens the steel but also improves its internal structure, resulting in a close-grained, stronger material.Licensed by Google 6:06 After rolling, the long slab's surface defects are burned off by an automatic scarfing machine before it is cut into suitable lengths for storage. 6:37 The film shows how some blooms are further rolled to make another semifinished product called billets. 7:11 This is done in a continuous mill, where each stand makes the bloom progressively smaller and longer. Billets can be either square or round. 7:23 The film lists the uses of billets: square billets can be rolled into rods for making wire, and round billets can be used for seamless steel tubes. 7:38 The film concludes by stating that billets, blooms, and slabs are the essential semifinished materials from which all steel products are ultimately made. Motion picture films don't last forever; many have already been lost or destroyed. For almost two decades, we've worked to collect, scan and preserve the world as it was captured on 35mm, 16mm and 8mm movies -- including home movies, industrial films, and other non-fiction. If you have endangered films you'd like to have scanned, or wish to donate celluloid to Periscope Film so that we can share them with the world, we'd love to hear from you. Contact us via the weblink below. This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD, 2k and 4k. For more information visit http://www.PeriscopeFilm.com Source: https://www.youtube.com/watch?v=f9piq5faeEo Mirrored from Periscope Film (https://www.youtube.com/@PeriscopeFilm) Sat, 13 Jun 2026 13:02:29 GMT https://validator.w3.org/feed/docs/rss2.html PeerTube - https://peertube.dngr.us https://peertube.dngr.us/lazy-static/avatars/41a6fee9-7f57-42d0-a5fc-5db4f1af2e31.png https://peertube.dngr.us/videos/watch/7d276661-f6b5-40d2-8333-683beee45451 All rights reserved, unless otherwise specified in the terms specified at https://peertube.dngr.us/about and potential licenses granted by each content's rightholder.