Chemical symbol Ni. Element No. 28 of the periodic system; atomic weight 58.69. Melting point 1455ºC (2651ºF.); boiling point about 2900ºC (5250ºF.), specific gravity 8.90. Hard, silvery-white metal known primarily as an alloy to improve strength and corrosion resistance of other metals, notably ...
Strictly speaking, stainless steel is a trade name, an alloy originally patented in 1916 by English metallurgist Harry Brearley, containing a maximum of 0.70% carbon and 9-16% chromium. In the United States, American Stainless Steel Co. of Pittsburgh, PA, produces a chrome-iron alloy under the ...
Measure of resistance to penetration when material is exposed to a pointed load. The Rockwell Hardness measurement produces hardness numbers related to the depth of residual penetration of a steel ball or diamond cone (brale) after a minor load of 10 kilograms has been applied to hold the ...
Chemical symbol Ti. Element No. 22 of the periodic system; atomic weight 47.90; melting point about 1668ºC (3270ºF.); boiling point over 3287ºC (5430ºF.); specific gravity 4.5. A bright white metal; very malleable and ductile. Its principal function has been as an alloy in steel making, but now is ...
The amount of compressive stress that a material is capable of sustaining before buckling or being crushed. If a material fails in compression by a brittle fracture, the compressive strength has a very definite value. Materials such as clay brick, cast iron, and concrete can exhibit great ...
Mold class refers to an industry standard provided by the Society of Plastics Industry (SPI) for classifying the quality and lifetime of molds. * Class 105 (<=500 cycles): The least expensive type of mold, which can be constructed from cast metal or epoxy, and is to be used for prototypes only. * ...
Chemical symbol Al. Element No. 13 on the periodic chart. Aluminum is a white-silver metal with an atomic weight 26.97, a melting point of 660°C (1220 °F), and a boiling point of approximately 2270°C (4118 °F). It is stable against normal atmospheric corrosion, but attacked by both acids and ...
To measure impact strength or notch toughness, a test specimen, usually of square crossed section, is notched and held between a pair of jaws, then broken by a swinging or falling weight. When the pendulum of the Izod testing machine is released it swings with a downward movement and when it ...
