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വിക്കിപീഡിയ

Material	ρ (Ω•m) at 20 °C	σ (S/m) at 20 °C	Temperature coefficient[note 1] (K−1)	Reference
Silver	1.59×10−8	6.30×107	0.0038	[8][9]
Copper	1.68×10−8	5.96×107	0.0068	[10]
Annealed copper[note 2]	1.72×10−8	5.80×107	0.00393	[11]
Gold[note 3]	2.44×10−8	4.10×107	0.0034	[8]
Aluminium[note 4]	2.82×10−8	3.5×107	0.0039	[8]
Calcium	3.36×10−8	2.98×107	0.0041
Tungsten	5.60×10−8	1.79×107	0.0045	[8]
Zinc	5.90×10−8	1.69×107	0.0037	[12]
Nickel	6.99×10−8	1.43×107	0.006
Lithium	9.28×10−8	1.08×107	0.006
Iron	1.0×10−7	1.00×107	0.005	[8]
Platinum	1.06×10−7	9.43×106	0.00392	[8]
Tin	1.09×10−7	9.17×106	0.0045
Carbon steel (1010)	1.43×10−7	6.99×106		[13]
Lead	2.2×10−7	4.55×106	0.0039	[8]
Titanium	4.20×10−7	2.38×106	X
Grain oriented electrical steel	4.60×10−7	2.17×106		[14]
Manganin	4.82×10−7	2.07×106	0.000002	[15]
Constantan	4.9×10−7	2.04×106	0.000008	[16]
Stainless steel[note 5]	6.9×10−7	1.45×106		[17]
Mercury	9.8×10−7	1.02×106	0.0009	[15]
Nichrome[note 6]	1.10×10−6	9.09×105	0.0004	[8]
GaAs	5×10−7 to 10×10−3	5×10−8 to 103		[18]
Carbon (amorphous)	5×10−4 to 8×10−4	1.25 to 2×103	−0.0005	[8][19]
Carbon (graphite)[note 7]	2.5e×10−6 to 5.0×10−6 //basal plane 3.0×10−3 ⊥basal plane	2 to 3×105 //basal plane 3.3×102 ⊥basal plane		[20]
Carbon (diamond)	1×1012	~10−13		[21]
Germanium[note 8]	4.6×10−1	2.17	−0.048	[8][9]
Sea water[note 9]	2×10−1	4.8		[22]
Drinking water[note 10]	2×101 to 2×103	5×10−4 to 5×10−2		[citation needed]
Silicon[note 8]	6.40×102	1.56×10−3	−0.075	[8]
Wood(damp)	1×103 to 4	10−4 to -3		[23]
Deionized water[note 11]	1.8×105	5.5×10−6		[24]
Glass	10×1010 to 10×1014	10−11 to 10−15	?	[8][9]
Hard rubber	1×1013	10−14	?	[8]
Wood(oven dry)	1×1014 to 16	10−16 to -14		[23]
Sulfur	1×1015	10−16	?	[8]
Air	1.3×1016 to 3.3×1016	3×10−15 to 8×10−15		[25]
Paraffin wax	1×1017	10−18	?
Fused quartz	7.5×1017	1.3×10−18	?	[8]
PET	10×1020	10−21	?
Teflon	10×1022 to 10×1024	10−25 to 10−2