Datasheet

76 Kanthal Appliance Alloys Handbook
Resistance per lb R
lb
[Ω/lb]
Combining [1’] and [18] ➔
R
lb
=
R
20 / ft
m
ft
=
ρ
q · q · γ
=
q
2
· γ
ρ
Wire
Strip
Ribbon
=
d
4
· 10
6
· π · γ · 3
ρ′
=
ρ′
R
lb
=
d
2
·10
6
· π · d
2
· γ · 3
ρ″
R
lb
=
b
2
· t
2
· γ · 12 · 10
6
=
b
2
· t
2
· 10.16 · γ · 10
6
ρ″
=
ρ″
R
lb
=
b
2
· t
2
· 0.92
2
· γ · 12 · 10
6
Metric and imperial sytem conversion table
1 Ωmm
2
m-
1
(µΩm) = 601.54 Ω/cmf
1 Ωmm
2
m-
1
(µΩm) = 472.44 Ω/smf
1 Ω/smf = 1.2732 Ω/cmf
1 inch [in] = 1000 mil = 0.0254 m
1 foot = 12 in = 0.3048 m
1 mil = 0.001 inch = 0.0254 mm
1 W/cm
2
= 6.45 W/in
2
1 W/in
2
= 0.155 W/cm
2
4. Relationship between metric and imperial units
Other equations which could be helpful
Length per lb l
lb
[ft/lb]
Based on equation [18] ➔ l
lb
=
1
m
ft
Wire
Strip
Ribbon
l
lb
4
=
π · d
2
·
γ
·12
=
π · d
2
·
γ
· 3
1
[18’]
l
lb
b · t ·
γ
· 12
=
1
[18’]
l
lb
0.92 · b · t ·
γ
· 12
=
1
b · t ·
γ
· 11.04
1
=
[18’]