Franck,
The thermal conductivity values reported for RapidSteel 2.0 are correct.
The primary difference between RapidSteel 1.0 and 2.0 is the thermal
conductivity of the infiltrant. The thermal conductivity of copper is
401 W/mK and the thermal conductivity of Bronze (89% Cu, 11% Sn) is 54
W/mK. The thermal conductivity of 316 stainless is 13.4 W/mK. If you
have a combination of the two metals, the thermal conductivity can not be
greater than the individual components. If the RapidSteel 2.0 sample was
fully dense (without defects), the thermal conductivity would approach 31
W/mK.
(55%)*(13.4 W/mK) + (45%)*(54 W/mK) = 31.5 W/mK
This number is in good agreement with the value reported.
Christian Nelson
DTM Corporation
Franck LACAN <Lacan@cardiff.ac.uk> on 10/28/98 11:13:47 AM
To: rp-ml@ltk.hut.fi
cc: (bcc: Christian Nelson/DTM)
Subject: RapidSteel 2.0 thermal conductivity
I have got a copy of RapidSteel 2.0 properties.
The given values for the thermal conductivity are 23 W/m
°C @ 100 °C
(13 BTU/hrft°F @212°F) and 28 W/m°C @ 200 °C (16 BTU/hrft°F @392°F).
They are much lower than for RapidSteel 1.0 (185 W/m°C) and even
lower than for P20 steel (29 W/m°C). Can anybody confirm if these
values are correct? Thank you,
Franck
==============================================================
Franck LACAN e-mail: Lacan@cf.ac.uk
==============================================================
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