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Tempering is a heat treatment technique applied to ferrous alloys, such as steel or cast iron, to achieve greater toughness by decreasing the hardness of the alloy. The reduction in hardness is usually accompanied by an increase in ductility, thereby decreasing the brittleness of the metal.
The discovery and exploitation of the Bolivian tin belt in the 19th century made tin far cheaper, although forecasts for future supplies are less positive. There are as many as 400 different copper and copper alloy compositions loosely grouped into the categories: copper, high copper alloy, brasses, bronzes, copper nickels, copper–nickel ...
Dynamo Open Air. Netherlands. 1986–2005. biggest annual metal festival during the 1990s, with 118,000 visitors in 1995. Moscow Music Peace Festival. Russia. 1989. part of an era of momentous change in the Soviet Union. Wacken Open Air.
This is a list of heavy metal artists from the formative years of the movement (formed between 1963 and 1981). For bands formed after 1981, please consult the lists for each heavy metal subgenre. In the late 1960s, a number of bands began pushing the limits of blues rock into a new genre which would be called heavy metal. [1] [2]
Alternative metal (or alt-metal) is a genre of heavy metal music that combines heavy metal with influences from alternative rock and other genres not normally associated with metal. [ 2 ] [ 3 ] Alternative metal bands are often characterized by heavily downtuned , mid-paced guitar riffs , a mixture of accessible melodic vocals and harsh vocals ...
Hardened steel. The term hardened steel is often used for a medium or high carbon steel that has been given heat treatment and then quenching followed by tempering. The quenching results in the formation of metastable martensite, the fraction of which is reduced to the desired amount during tempering. This is the most common state for finished ...
A fusible alloy is a metal alloy capable of being easily fused, i.e. easily meltable, at relatively low temperatures. Fusible alloys are commonly, but not necessarily, eutectic alloys. Sometimes the term "fusible alloy" is used to describe alloys with a melting point below 183 °C (361 °F; 456 K). Fusible alloys in this sense are used for solder .
T6 temper 6061 has been treated to provide the maximum precipitation hardening (and therefore maximum yield strength) for a 6061 aluminium alloy. It has an ultimate tensile strength of at least 290 MPa (42 ksi) and yield strength of at least 240 MPa (35 ksi). More typical values are 310 MPa (45 ksi) and 270 MPa (39 ksi), respectively. [10]