LEAD ALLOYING
Alloying is technique of combining or mixing two or more metals
to make an entirely new metal, for example mixing copper and tin
to create bronze. The process of Alloying is entirely opposite
of Refining but Technically it has some resemblance as both the
process are temperature based chemical process where in one
process some elements are taken out at regular intervals and in
other some elements are mixed.
The natural lubricity and wear resistance of Lead make the metal
suitable, in alloys, for heavy-duty bearing applications such as
railroad-car journal bearings and piston-engine crank bearings.
Lead is also widely used as a constituent in solders. Most
common solders are the Lead-tin alloys; melting temperature can
be as low as 361°F.
In its unalloyed form (defined by ASTM B29 as 99.85% minimum
Lead), Lead is soft and weak; it requires support for mechanical
applications. This "chemical Lead" is used primarily in
corrosive chemical-handling applications such as tank linings.
"Hard Lead" — Lead alloyed with 1 to 13% antimony — has
sufficient tensile strength, fatigue resistance, and hardness
for many mechanical applications. These alloys can be cast,
rolled, or extruded and are especially suited for castings
requiring good detail and moderate strength. Rolled antimonial
alloys are harder and stronger than the cast alloys.
Battery-plate Lead contains 7 to 12% antimony. Lead-antimony
alloys with antimony contents of between 1 and 12% are used
widely in the chemical industry for pumps and valves on chemical
plants and in radiation shielding both for lining the walls of
X-ray rooms and for bricks to house radioactive sources in the
nuclear industry. The addition of antimony to Lead increases
lead's hardness and therefore its resistance to physical damage
without greatly reducing its corrosion resistance.
Lead-tin Alloy: A substantial proportion of solder is used in
electrical or electronic assemblies. The advances made in these
industries have made it essential to devise fast and highly
automated methods of soldering. Printed circuit assemblies are
now soldered by passing them across a standing wave of
continuously circulating molten solder.
Calcium (0.03 to 0.12%) forms another series of mechanically
suitable alloys with Lead. These alloys age harden naturally at
room temperature — usually for 30 to 60 days — after being cast
or worked. Properties of wrought Pb-Ca alloys are somewhat
directional, being greater in the longitudinal direction. Uses
include cable sheathing and grids in storage batteries.
Tin, added to Pb-Ca alloys in amounts to about 1.5%, raises
tensile strength and stress-rupture resistance but increases
aging time to 180 days. Tin is also used to reduce coefficient
of friction for bearing applications. Higher tin-bearing alloys
are primarily used in solders, which normally contain from 40 to
60% tin.
Lead alloys can be cast using most methods. Intricate details
can be reproduced, and the surface can be readily painted. Lead
alloys can be extruded into pipes, bars, channels, and rods.
In our process of Lead Alloying, we manufacture varieties of
Lead Alloys based on the customer specifications. We are capable
of manufacturing the following types:
- Calcium – Lead Alloy
- Antimony- Selenium Lead Alloy - 2.5
- Antimony Lead Alloy - 3.0
- Antimony Lead Alloy - 4.5
- Copper - Lead Alloy
- Tin - Lead Alloy
- Many more….
This operation includes the addition of specific elements as per
the requirement, namely: antimony, tin, arsenic, copper and
iron. The Lead bullions from the Rotary furnaces can be charged
directly into the Alloying kettle and melted. This is based on
the specification of Lead bullion if it is close to the
requirement of Lead Alloy; otherwise Pure Lead is used for
making corresponding Lead Alloy.

Lead Oxide Barton Process Plant
- We manufacture any shape or size that you need.
- You can choose from our in-stock sizes or we can design and cast your
requirement for you.
- Our manufacturing plant is capable of expediting orders from a few pounds to
hundreds of tons.
- We will customize your alloyed requirements.
- Let us take care of everything, from manufacturing to shipping.
|