|
LEAD
ROD (Pb)
MATERIAL
OVERVIEW
Characteristics:
Heavy, ductile, soft gray solid. Soluble in dilute
nitric acid, insoluble in water but dissolves slowly
in water containing a weak acid, resists corrosion and
is relatively impenetrable to radiation. Poor
electrical conductor; good sound and vibration
absorber. Noncombustible.
Hazards:
Toxic by ingestion and inhalation of dust or fume.
Tolerance (as Pb), (fumes and dusts, and inorganic
compounds) 0.15 mg/m3 of air. For ambient air the EPA standard is 1.5 ug/m3.
A cumulative poison. FDA regulations require zero lead
content in foods and limit lead content in house
paints to .05%.
GENERAL
PROPERTIES
|
Symbol:
|
Pb
|
|
Atomic
Number:
|
82
|
|
Atomic
Weight:
|
207.2
|
|
Density:
|
11.35
gm/cc
|
|
Melting
Point:
|
327.502
oC
|
|
Boiling
Point:
|
1740
oC
|
|
Thermal
Conductivity:
|
0.353
W/cm/oK
@ 298.2 oK
|
|
Electrical
Resistivity:
|
20.648
microhm-cm @ 20 oC
|
|
Electronegativity:
|
1.8
Paulings
|
|
Specific
Heat:
|
0.038
Cal/g/oK
@ 25 oC
|
|
Heat
of Vaporization:
|
42.4
K-Cal/gm atom at 1740 oC
|
|
Heat
of Fusion:
|
1.224
Cal/gm mole
|
TYPICAL
ANALYSES
Impurities
in ppm
|
Material
/ Purity:
|
4N5
|
5N
|
6N
|
|
Sb
|
1
|
1
|
-
|
|
As
|
5
|
1
|
-
|
|
Bi
|
4
|
.2
|
-
|
|
Cu
|
4
|
1
|
-
|
|
Ag
|
2
|
1
|
<.1
|
|
Tl
|
1
|
2
|
-
|
|
Sn
|
.3
|
1
|
-
|
|
Fe
|
.3
|
.2
|
<.1
|
|
Ca
|
.4
|
.1
|
.1
|
|
Mg
|
-
|
.3
|
.1
|
LEAD
ROD
|
Material
|
Purity
|
|
Lead
Rod .0625”
|
3N,
4N, 5N, 6N
|
|
Lead
Rod .125”
|
3N,
4N, 5N, 6N
|
|
Lead
Rod .250”
|
3N,
4N, 5N, 6N
|
|
Lead
Rod .500”
|
3N,
4N, 5N, 6N
|
|
Lead
Rod .625”
|
3N,
4N, 5N, 6N
|
|
Lead
Rod .750”
|
3N,
4N, 5N, 6N
|
|
Lead
Rod 1”
|
3N,
4N, 5N, 6N
|
Rod
is cut to order and sold by the inch or foot.
|
 |
