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This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.
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-value per metre. R-values are additive for layers of materials, and the higher the R-value the better the performance.
The Lankford coefficient (also called Lankford value, R-value, or plastic strain ratio) [1] is a measure of the plastic anisotropy of a rolled sheet metal. This scalar quantity is used extensively as an indicator of the formability of recrystallized low-carbon steel sheets.
Toggle the table of contents. ... Download as PDF; Printable version; In other projects ... Material ε r; Vacuum: 1 (by definition) Air:
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R-value (soils) in geotechnical engineering, the stability of soils and aggregates for pavement construction; R-factor (crystallography), a measure of the agreement between the crystallographic model and the diffraction data; R 0 or R number, the basic reproduction number in epidemiology; In computer science, a pure value which cannot be ...
A material property is an intensive property of a material, i.e., a physical property or chemical property that does not depend on the amount of the material. These quantitative properties may be used as a metric by which the benefits of one material versus another can be compared, thereby aiding in materials selection.
List: Formula values (6), page 10, Robertson. [31] 300 *5 MPa is 5 ⋅ 10 6 Pascals or 5 ⋅ 10 6 Newtons per meter 2 or about fifty atmospheres pressure. *Solidity ≡ the ratio of the volume of solid to the bulk volume, or the ratio of bulk density to solid grain density d B /d G. Symbols: % v is percent by volume. Rock, mafic igneous: Air in ...