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  2. Lankford coefficient - Wikipedia

    en.wikipedia.org/wiki/Lankford_coefficient

    However, in the actual press-working, the deep-drawability of steel sheets cannot be determined only by the value of and the measure of planar anisotropy, is more appropriate. In an ordinary cold rolled steel, R 90 {\displaystyle R_{90}} is the highest, and R 45 {\displaystyle R_{45}} is the lowest.

  3. Metal prices - Wikipedia

    en.wikipedia.org/wiki/Metal_prices

    Metal prices are the prices of metal as a commodity that are traded in bulk at a predefined purity or grade. Metal can be split into three major categories, precious metals, industrial metals and other metals. Precious metals and industrial metals are priced by trading of those metals on commodities exchanges. [1]

  4. R-value (insulation) - Wikipedia

    en.wikipedia.org/wiki/R-value_(insulation)

    The R-value is the building industry term [3] for thermal resistance "per unit area." [4] It is sometimes denoted RSI-value if the SI units are used. [5] An R-value can be given for a material (e.g., for polyethylene foam), or for an assembly of materials (e.g., a wall or a window). In the case of materials, it is often expressed in terms of R ...

  5. Building insulation - Wikipedia

    en.wikipedia.org/wiki/Building_insulation

    Prescriptive insulation minimum R-value requirements (°F⋅ft 2 ⋅h/BTU) Wood Framed walls Steel Framed walls Mass walls zone Non-residential Residential Non-Residential Residential Non-Residential Residential 1 13 13 13 13 NR 5.7 2 13 13 13 13+7.5 5.7 7.6 3 13 13 13+3.8 13+7.5 7.6 9.5 4 13 13+3.8 13+7.5 13+7.5 9.5 11.4 5 13+3.8 13+7.5 13+3.8

  6. Thermal conductance and resistance - Wikipedia

    en.wikipedia.org/wiki/Thermal_conductance_and...

    Thermal insulance (R-value) is a measure of a material's resistance to the heat current. It quantifies how effectively a material can resist the transfer of heat through conduction, convection, and radiation.

  7. Steel grades - Wikipedia

    en.wikipedia.org/wiki/Steel_grades

    American steel grades : AISI/SAE steel grades standard; British Standards; International Organization for Standardization ISO/TS 4949:2016; European standards – EN 10027; Japanese steel grades : Japanese Industrial Standards (JIS) standard and NK standard; Germany steel grades : DIN standard; China steel grades : GB standard; Czech steel ...