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  2. Messier 19 - Wikipedia

    en.wikipedia.org/wiki/Messier_19

    Messier 19 or M19 (also designated NGC 6273) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier on June 5, 1764 [6] and added to his catalogue of comet-like objects that same year. It was resolved into individual stars by William Herschel in 1784.

  3. Sheet metal - Wikipedia

    en.wikipedia.org/wiki/Sheet_metal

    In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its gauge. The larger the gauge number, the thinner the metal. Commonly used steel sheet metal ranges from 30 gauge to about 7 gauge. Gauge differs between ferrous metals and nonferrous metals such as aluminum or copper. Copper ...

  4. Steel grades - Wikipedia

    en.wikipedia.org/wiki/Steel_grades

    EN 10027-1 steel grade designation system. European standard steel grade names fall into two categories: [1] Steel specified by purpose of use and mechanical properties. Steel specified by chemical composition. The inclusion of a letter 'G' before the code indicates the steel is specified in the form of a casting.

  5. Structural steel - Wikipedia

    en.wikipedia.org/wiki/Structural_steel

    Steel never turns into a liquid below this temperature. Pure Iron ('Steel' with 0% Carbon) starts to melt at 1,492 °C (2,718 °F), and is completely liquid upon reaching 1,539 °C (2,802 °F). Steel with 2.1% Carbon by weight begins melting at 1,130 °C (2,070 °F), and is completely molten upon reaching 1,315 °C (2,399 °F).

  6. Corrugated galvanised iron - Wikipedia

    en.wikipedia.org/wiki/Corrugated_galvanised_iron

    Corrugated galvanised iron (CGI) or steel, colloquially corrugated iron (near universal), wriggly tin (taken from UK military slang), pailing (in Caribbean English), corrugated sheet metal (in North America), zinc (in Cyprus and Nigeria) or custom orb / corro sheet (Australia), is a building material composed of sheets of hot-dip galvanised ...

  7. SAE steel grades - Wikipedia

    en.wikipedia.org/wiki/SAE_steel_grades

    Type 308—used as the filler metal when welding 304. Type 309—better temperature resistance than 304, also sometimes used as filler metal when welding dissimilar steels, along with inconel. Type 310 310S— is a highly alloyed austenitic stainless steel used for high temperature application. The high chromium and nickel content give the ...

  8. Alloy steel - Wikipedia

    en.wikipedia.org/wiki/Alloy_steel

    The properties of steel depend on its microstructure: the arrangement of different phases, some harder, some with greater ductility. At the atomic level, the four phases of auto steel include martensite (the hardest yet most brittle), bainite (less hard), ferrite (more ductile), and austenite (the most ductile). The phases are arranged by ...

  9. Talk:Sheet metal - Wikipedia

    en.wikipedia.org/wiki/Talk:Sheet_metal

    The gauge section didn't explain 'gauge' entirely. Seconded - having read this : . . . "The weight of steel per square foot per inch of thickness is 41.82 lb (18.96 kg), this is known as the Manufacturers' Standard Gage for Sheet Steel" I still have no idea what Gauge actually means. How could I use that to work out what thickness 18 gauge is.

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