PHYSICAL PROPERTIES
| Atomic number |
82 |
| Atomic weight |
207.22 |
| Density |
203 ºC., cast |
| |
327.43 ºC., solid |
| |
327.43 ºC., liquid |
| |
550 3ºC., liquid |
|
| 11.35 |
| 11.005 |
| 10.686 |
| 10.418 |
|
| Atomic volume |
18.27 |
| Melting point ºC |
327.4 |
| Boiling point ºC |
1525 - 1620 |
| Specific heat, per ºC., cal
per g. |
0.030 |
| Latent heat of fusion, cal
per g. |
5.47 - 6.26 |
| Coef. of linear expansion (17
- 100 ºC), per ºC |
0.0000293 |
Thermal conductivity,
cal./cm.2/cm./ºC/sec.
at room temperature |
0.083 |
| Electrical resistivity,
microhm/cm. |
20.65 |
| Modulus of elasticity in
tension |
0.8 - 2.0 million |
| |
|
|
|
LEAD - General Properties
Color..........................................................................................................Silvery
grey
Patina ...................On
atmospheric exposure lead takes on a silvery grey patina except in
industrial atmosphere where it changes to dark grey to black
Atomic
number.......................................................................................................
82
Atomic
arrangement......................................................................
Cubic face-centered
Length of lattice
edge....................................................................................
4.9398 A
Atomic weight
.................................................................................................
207.21 |
|
|
LEAD - Melting Point |
Common lead
Chemical lead |
621 °F (327.4 °C)
618 °F (325.6 °C)
|
|
|
|
LEAD - Coefficient of
Expansion |
Linear, (-312
°F to 63 °F, mean) x 10¯6
Linear, (63 °F to
212 °F, mean) x 10¯6 |
14.7/°F (26.5/°C)
16.3/°F (29.3/°C)
|
|
|
|
LEAD - Electrical Properties |
Specific electrical
conductance - ohm/in.
at 32 °F x
10¯4
64 °F x 10¯4
Atomic electrical
conductance, calculated
Relative electrical
conductance (copper 100)
Relative electrical
resistance (copper 100)
Magnetic
susceptibility per ounce (g.) x 10 6 |
12.83 (5.05)
12.27 (4.83)
1.139 x 10
6
7.82
1280
-3.402 (-0.12)
|
|
|
LEAD - Mechanical Properties |
Moh's
scale
Brinell no., 1 cm. ball,
30 sec., 100kg. load
Common lead
Chemical lead
Influence of temperature
on Brinell hardness (chemical lead)
Temperature °F
Hardness
Ultimate tensile strength
Common lead
Chemical lead |
1.5
3.2 to 4.5
4.5 to 6.0
75 212 302
5.3 3.6 2.6
1400 to 1700 psi
2300 to 2800 psi
|
|
|
Tensile strength and
elongation
(Rolled specimens, Rm. temp.,
pulling speed - 1/4 in. /min./in. of test specimen) |
|
Grade
|
Tensile Strength
-psi
|
Elongation
percent
|
corroding (99.99 + 0.006
Bi)
common (99.85 + 0.13 Bi)
common (0.002 Cu)
chemical (99.92 + 0.06 Cu)
chemical (commercial sheet)
chemical (extruded) |
1904
1931
2093
2961
2454
2200
|
37.7
34.4
43.0
42.2
47.0
48.0
|
Top of page
|
Resistance to Bending
(extruded strips under 200psi
stress subjected to alternate 90 ° reverse bends over 5 in. rolls, 11
cycles per min.) |
|
Grade
|
Cycles to
Failure
|
Elongation
percent
|
corroding
common
chemical |
54
72
103
|
35
49
52
|
|
| Creep (room
temperature) Creep, percent per hour |
|
Stress
psi
|
Common Lead
|
Chemical or
Copper Lead
|
|
200
300
400
|
5 X 10¯5
3.5 X 10¯4
11 X 10¯4
|
0.4 X 10¯5
1.5 X 10¯5
3 X 10¯5
|
|
Fatigue
Fatigue limit (50,000,000 cycles
extruded 215 psi) |
|
Metal
|
Endurance Limit
5 X 10¯7
Cycles
psi
|
Endurance Limit
10¯7
Cycles
|
lead
lead + 0.026% calcium
lead + 0.038% calcium
lead + 0.04% calcium
lead + 0.06% calcium
lead + 1% antimony
lead + 2% tin
lead + 0.06% copper
lead + 0.045% tellurium |
215 - 400
--
685 - 840
820 - 1500
1120
300 - 1000
800
600
--
|
407
1038
--
1180
--
--
--
725
1000
|
|
|