MATERIAL PROPERTIES · ENGINEERING REFERENCE

Engineering Material Thermal Conductivity Sources

Find authoritative sources by material, condition and temperature. Select data for the actual application and verify units and original references.

Check before use

Thermal conductivity depends on temperature, grade, heat treatment, purity, porosity, moisture and measurement direction. These are links to official sources, not universal values for every product. Check each external source for its own terms of use and redistribution.

Thermal conductivity is commonly given in W/(m·K); K denotes absolute temperature and °C denotes degrees Celsius.

Insulation and building materials: NIST SRD 81

The database contains measured heat-transmission properties for a range of insulation and building-material specimens. Search by material, bulk density, mean temperature and thickness, and inspect each specimen's details.

The documented overall specimen mean-temperature range is −19.02 to 58.6 °C; it does not mean that every material covers the entire interval. The data content was last updated in 1983; do not substitute historical samples for current product declarations.

Open NIST SRD 81 ↗ · Search instructions and ranges ↗

Metals and composites: NIST cryogenic materials

These links open the material pages directly. Data and correlation ranges may differ. Check condition, temperature, measurement direction and original references on each page; do not extrapolate beyond the limits for the property.

304 stainless steel · UNS S30400

The source lists a thermal conductivity data range of 4–300 K. Grade alone does not establish the complete heat treatment or specimen condition.

View 304 stainless steel ↗

6061-T6 aluminium · UNS A96061

The source lists a thermal conductivity data range of 4–300 K; retain the T6 condition when selecting data.

View 6061-T6 aluminium ↗

OFHC copper · UNS C10100/C10200

The source separates conductivity curves by residual resistivity ratio (RRR), with a 4–300 K range. Match purity and RRR to the material in use.

View OFHC copper ↗

G-10 CR fiberglass epoxy

The source distinguishes normal and warp directions; conductivity data span 4–300 K in both, but correlation ranges differ by direction.

View G-10 CR ↗

Browse the NIST cryogenic materials index ↗ · NIST material-property calculator ↗

Sources and permissions

Links lead to the US National Institute of Standards and Technology (NIST). NIST states that its Standard Reference Data may be protected by copyright; free online access does not imply unrestricted copying or redistribution. This page does not reproduce their data tables or correlation coefficients.

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Verify data against actual conditions and applicable requirements; test specimens do not automatically represent a particular product.

Pipe-insulation specimen conductivities →

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