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Stone Wool – Material Table – Applications – Price

About Stone Wool

Stone Wool, also known as rock wool, is based on natural minerals present in large quantities throughout the earth, e.g. volcanic rock, typically basalt or dolomite. Next to raw materials, also recycled rock wool can be added to the process as well as slag residues from the metal industry. It combines mechanical resistance with good thermal performance, fire safety and high temperature suitability.

stone wool properties density strength price

Summary

Name Stone Wool
Phase at STP solid
Density 20 kg/m3
Ultimate Tensile Strength 0.02 MPa
Yield Strength N/A
Young’s Modulus of Elasticity N/A
Brinell Hardness N/A
Melting Point 997 °C
Thermal Conductivity 0.03 W/mK
Heat Capacity 700 J/g K
Price 3 $/kg

Composition of Stone Wool

Glass‐ and stone wool are produced from mineral fibres and are therefore often referred to as ‘mineral wools’. Mineral wool is a general name for fiber materials that are formed by spinning or drawing molten minerals. Stone wool is a furnace product of molten rock at a temperature of about 1600 °C, through which a stream of air or steam is blown. More advanced production techniques are based on spinning molten rock in high-speed spinning heads somewhat like the process used to produce cotton candy.

40%Carbon in Periodic Table

25%Calcium in Periodic Table

15%Magnesium in Periodic Table

Applications of Stone Wool

stone wool - rock wool - thermal insulationApplications of stone wool include structural insulation pipe insulation, filtration, soundproofing, and hydroponic growth medium. Stone wool is a versatile material that can be used for the insulation of walls, roofs and floors. During the installation of the stone wool, it should be kept dry at all times, since an increase of the moisture content causes a significant increase in thermal conductivity.

Mechanical Properties of Stone Wool

Strength of Stone Wool

In mechanics of materials, the strength of a material is its ability to withstand an applied load without failure or plastic deformation. Strength of materials basically considers the relationship between the external loads applied to a material and the resulting deformation or change in material dimensions. In designing structures and machines, it is important to consider these factors, in order that the material selected will have adequate strength to resist applied loads or forces and retain its original shape.

Strength of a material is its ability to withstand this applied load without failure or plastic deformation. For tensile stress, the capacity of a material or structure to withstand loads tending to elongate is known as ultimate tensile strength (UTS). Yield strength or yield stress is the material property defined as the stress at which a material begins to deform plastically whereas yield point is the point where nonlinear (elastic + plastic) deformation begins. In case of tensional stress of a uniform bar (stress-strain curve), the Hooke’s law describes behaviour of a bar in the elastic region. The Young’s modulus of elasticity is the elastic modulus for tensile and compressive stress in the linear elasticity regime of a uniaxial deformation and is usually assessed by tensile tests.

See also: Strength of Materials

Ultimate Tensile Strength of Stone Wool

Ultimate tensile strength of Stone Wool is 0.02 MPa.

Yield Strength of Stone Wool

Yield strength of Stone Wool is N/A.

Modulus of Elasticity of Stone Wool

The Young’s modulus of elasticity of Stone Wool is N/A.

Hardness of Stone Wool

In materials science, hardness is the ability to withstand surface indentation (localized plastic deformation) and scratchingBrinell hardness test is one of indentation hardness tests, that has been developed for hardness testing. In Brinell tests, a hard, spherical indenter is forced under a specific load into the surface of the metal to be tested.

The Brinell hardness number (HB) is the load divided by the surface area of the indentation. The diameter of the impression is measured with a microscope with a superimposed scale. The Brinell hardness number is computed from the equation:

brinell hardness number - definition

Brinell hardness of Stone Wool is approximately N/A.

See also: Hardness of Materials

Strength of Materials

Material Table - Strength of Materials

Elasticity of Materials

Material Table - Elasticity of Materials

Hardness of Materials

Material Table - Hardness of Materials  

Thermal Properties of Stone Wool

Stone Wool – Melting Point

Melting point of Stone Wool is 997 °C.

Note that, these points are associated with the standard atmospheric pressure. In general, melting is a phase change of a substance from the solid to the liquid phase. The melting point of a substance is the temperature at which this phase change occurs. The melting point also defines a condition in which the solid and liquid can exist in equilibrium. For various chemical compounds and alloys, it is difficult to define the melting point, since they are usually a mixture of various chemical elements.

Stone Wool – Thermal Conductivity

Thermal conductivity of Stone Wool is 0.03 W/(m·K).

The heat transfer characteristics of a solid material are measured by a property called the thermal conductivity, k (or λ), measured in W/m.K. It is a measure of a substance’s ability to transfer heat through a material by conduction. Note that Fourier’s law applies for all matter, regardless of its state (solid, liquid, or gas), therefore, it is also defined for liquids and gases.

The thermal conductivity of most liquids and solids varies with temperature. For vapors, it also depends upon pressure. In general:

thermal conductivity - definition

Most materials are very nearly homogeneous, therefore we can usually write k = k (T). Similar definitions are associated with thermal conductivities in the y- and z-directions (ky, kz), but for an isotropic material the thermal conductivity is independent of the direction of transfer, kx = ky = kz = k.

Stone Wool – Specific Heat

Specific heat of Stone Wool is 700 J/g K.

Specific heat, or specific heat capacity, is a property related to internal energy that is very important in thermodynamics. The intensive properties cv and cp are defined for pure, simple compressible substances as partial derivatives of the internal energy u(T, v) and enthalpy h(T, p), respectively:

where the subscripts v and p denote the variables held fixed during differentiation. The properties cv and cp are referred to as specific heats (or heat capacities) because under certain special conditions they relate the temperature change of a system to the amount of energy added by heat transfer. Their SI units are J/kg K or J/mol K.

Melting Point of Materials

Material Table - Melting Point

Thermal Conductivity of Materials

Material Table - Thermal Conductivity

Heat Capacity of Materials

Material Table - Heat Capacity

Properties and prices of other materials

material-table-in-8k-resolution