K Thermal Conductivity

Determining K-Thermal Conductivity The K-Thermal Conductivity chart below provides conductivity values for a variety of steel and non-steel materials under various heating conditions. These factors determine how well heat passes through a material and can be used to improve the tooling and processing of an injection molded part.

For example, if a molder is trying to extract more heat out of one particular area in a molded part, using a different type of material for that specific portion of the mold may be a better alternative than changing the processing temperature for that entire half of the mold. The chart provides a guideline for increasing or decreasing the heat extraction rates as the design and/or tooling requires.

20°C Material A2 D2 D6 H13 H11 01 P2 & P4 P20 S7 SS420 SS304 Silver Copper Ampcoloy 940 Magnesium Aluminium Ampcoloy 945 Be Cu Alloy 25 Titanium Al-V MgO (compacted) Water Air

cal

K-THERMAL CONDUCTIVITY 68°F 200°C W BTU BTU cal W

cm s °C m. °C 0.06 26 0.05 20 0.05 20.5 0.06 24.6 0.04 17.6 0.08 32 0.07 28.9 0.07 29 0.07 29 0.06 23 0.04 15.1 0.99 418 0.72 302 0.51 216 0.38 159 0.36 152 0.33 138 0.32 134 0.02 6.57 0.01 2.88 0 0.6 -0.26

Ft h.°F in. Ft h.°F 181 15 139 11.6 142 11.8 180 14.2 122.4 10.2 222 18.5 200 16.7 202 16.8 202 16.8 159 13.2 105 8.6 2900 241.6 2094 174.5 1500 125 1106 92.1 1052 87.7 960 80 928 77.3 45.6 3.8 20 1.7 4.2 0.35 0.18 0.02 2

cm s °C m. °C 0.06 27 0.05 21 0.05 21.5 0.06 26.2 0.06 23.9 0.08 33 0.07 29.2 0.07 29.5 0.07 30 0.06 24

390°F BTU Ft h.°F in. 188 146 149 184 165.6 229 203 205 207 166 2

nd non-steel materials material and can be

part, using a different g the processing

design and/or tooling

390°F BTU Ft h.°F 15.6 12.1 12.4 153 13.8 19.1 16.9 17.1 17.3 13.8