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Cryogenic hardening is a cryogenic treatment process where the material is cooled to approximately −185 °C (−301 °F), typically using liquid nitrogen.It can have a profound effect on the mechanical properties of certain steels, provided their composition and prior heat treatment are such that they retain some austenite at room temperature.
All-Steel-Equip pioneered the lateral file in 1967, [2] with production beginning in 1969, and it became a huge commercial success. The company restructured after the merger with B.K. Johl, and in 1973 renamed its furniture divisions All-Steel Inc. and All-Steel Canada Ltd., both of which reduced to Allsteel in 1986.
M35 is similar to M2, but with 5% cobalt added. M35 is also known as Cobalt Steel, HSSE or HSS-E. It will cut faster and last longer than M2. [15] M42 M42 is a molybdenum-series high-speed steel alloy with an additional 8% cobalt. [14]
1945 Steelcase Metal Office Furniture Multiple 15 desk. Steelcase released Multiple 15 desks in 1946, which introduced standardized desk sizing and became a universal industry standard. [6] Series 9000 was released in 1973 and became Steelcase's most popular line of office systems.
Underlay is also the term for the material under roofing tiles; [1] this roofing membrane is often made of rubber and is used to seal the roof and prevent leakage. Underlayment used with roofing shingles provides a second layer of water proofing to prevent leaks and is called tar paper , roofing felt , or since the 1990s synthetic underlayment.
Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...
A pedestal desk. A pedestal desk or a tanker desk is usually a large, flat, free-standing desk made of a simple rectangular working surface resting on two pedestals or small cabinets of stacked drawers of one or two sizes, with plinths around the bases. Often, there is also a central large drawer above the legs and knees of the user.
SVCM steel is a kind of shock-resisting steel. [5] SVCM steel is an alloy of carbon , silicon , chromium , magnesium , nickel , molybdenum and lead . [ 6 ] SVCM+ in addition is quenched and tempered achieving a high hardness ( HRC 59). [ 6 ]