Useful thermoconductivities

Material	Temperature	Thermoconductivity (W/mK)	Working temperature (K)
Apiezon N	293	0.194	4 - 300
	4	0.095
Varnish	300	0.44	423
	100	0.24
	77	0.22
	4.2	0.062
	1	0.034
Crycon grease	4.2	0.1
	2	0.03
Copper	300	400
Silver	300	429
Gold	300	318
Stainless steel	300	11-- 45
air	300	0.025