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  2. Specific strength - Wikipedia

    en.wikipedia.org/wiki/Specific_strength

    It is also known as the strength-to-weight ratio or strength/weight ratio or strength-to-mass ratio. In fiber or textile applications, tenacity is the usual measure of specific strength. The SI unit for specific strength is Pa ⋅ m 3 / kg , or N ⋅m/kg, which is dimensionally equivalent to m 2 /s 2 , though the latter form is rarely used.

  3. Quality control system for paper, board and tissue machines

    en.wikipedia.org/wiki/Quality_control_system_for...

    The measurements are taken on the diagonal line and act as basis for profile (machine and cross-direction) and variation calculations. This value is subject to integration depending on the machine speed. If the measurement signal sampling frequency is in size range 2000/s, then the smallest measurement element is about 0.2 cm in cross-direction.

  4. Grammage - Wikipedia

    en.wikipedia.org/wiki/Grammage

    However, a sheet of common copy paper that has a basis weight of 20 pounds (9.1 kg) does not have the same mass as the same size sheet of coarse paper (newsprint). In the former case, the standard ream is 500 sheets of 17-by-22-inch (432 by 559 mm) paper, and in the latter, 500 sheets of 24-by-36-inch (610 by 914 mm) paper.

  5. Specific modulus - Wikipedia

    en.wikipedia.org/wiki/Specific_modulus

    It is also known as the stiffness to weight ratio or ... Specific stiffness of materials within the range 0.9–5.0 g/cm 3 density and ... metal (Mg) 45: 1.738 ...

  6. Sheet metal - Wikipedia

    en.wikipedia.org/wiki/Sheet_metal

    Sheet metal is available in flat pieces or coiled strips. The coils are formed by running a continuous sheet of metal through a roll slitter. In most of the world, sheet metal thickness is consistently specified in millimeters. In the U.S., the thickness of sheet metal is commonly specified by a traditional, non-linear measure known as its ...

  7. Paper density - Wikipedia

    en.wikipedia.org/wiki/Paper_density

    Weighing scale to determine paper weight. Paper density is a paper product's mass per unit volume.The density can be calculated by dividing the grammage of paper (in grams per square metre or "gsm") by its caliper (usually in micrometres, occasionally in mils).

  8. Structural steel - Wikipedia

    en.wikipedia.org/wiki/Structural_steel

    Plate, metal sheets thicker than 6 mm or 1 ⁄ 4 in. Open web steel joist While many sections are made by hot or cold rolling , others are made by welding together flat or bent plates (for example, the largest circular hollow sections are made from flat plate bent into a circle and seam-welded).

  9. Indentation hardness - Wikipedia

    en.wikipedia.org/wiki/Indentation_hardness

    Indentation hardness tests are used in mechanical engineering to determine the hardness of a material to deformation.Several such tests exist, wherein the examined material is indented until an impression is formed; these tests can be performed on a macroscopic or microscopic scale.