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Low-background steel, also known as pre-war steel [1] and pre-atomic steel, [2] is any steel produced prior to the detonation of the first nuclear bombs in the 1940s and 1950s. Typically sourced from ships (either as part of regular scrapping or shipwrecks ) and other steel artifacts of this era, it is often used for modern particle detectors ...
Unexploded ordnance (UXO, sometimes abbreviated as UO) and unexploded bombs (UXBs) are explosive weapons (bombs, shells, grenades, land mines, naval mines, cluster munition, and other munitions) that did not explode when they were deployed and remain at detonative risk, sometimes many decades after they were used or discarded.
This is a list of notable types of weapons which saw use in warfare, and more broadly in combat, prior to the advent of the early modern period, i.e., approximately prior to the start of the 16th century.
The reduced engine speeds allow more time for autoignition chemistry to complete thus promoting the possibility of pre-ignition and so called "mega-knock". Under these circumstances, there is still significant debate as to the sources of the pre-ignition event. [3] Pre-ignition and engine knock both sharply increase combustion chamber temperatures.
The scrap is loaded into large buckets called baskets, with "clamshell" doors for a base. Care is taken to layer the scrap in the basket to ensure good furnace operation; heavy melt is placed on top of a light layer of protective shred, on top of which is placed more shred. These layers should be present in the furnace after charging.
As of 2000, the waelz process is considered to be a "best available technology" for flue dust zinc recovery and the process is used at industrial scale worldwide. [ 7 ] As of 2014, the Waelz process is the preferred or most widely used process for zinc recovery of zinc from electric arc furnace dust (90%).
The Armor Survivability Kit consisted of armored steel doors with bullet-proof glass, protective armored plating, and a ballistic windshield and came in either a two-door kit variant (weighing 900 pounds/409 kilograms) or a four-door kit variant (weighing 1,300 pounds/590 kilograms).
HMS 1 is the term for heavier scrap which has a density of at least 0.7 tons per cubic meter, whereas HMS 2 would be lighter steel scrap Because both grades guarantee a minimum piece thickness – at least 1 ⁄ 4 inch (6.35 mm) for HMS 1, and 1 ⁄ 8 inch (3.175 mm) for HMS 2 – consignments have a high density.