99.65% Minimum Antimony

Lead-free99.65% Minimum Antimony Economical Alternative to High Grade Lead Hardener Three Forms for Different Melt Sizes

99.65% minimum antimony in slab, 1/2" and down, and 8–20 mesh forms. A cost-effective grade for lead hardening, battery alloys, and alloying additions.

Solidus

1,167°F (631°C)

Liquidus

1,167°F (631°C)

Density

0.241 lbs/in³ (6.68 g/cm³)

Primary Elements

Nominal Composition

99.65% Sb

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Product Overview

99.65% Minimum Antimony is a commercial-grade antimony metal for alloying and chemical uses where the highest purity is not required. Antimony is a brittle, silver-white metalloid with a melting point of 1,167°F (630°C) and a density of 0.241 lbs/in³ (6.68 g/cm³). This grade offers an economical alternative to our High Grade 99.85% antimony for applications that tolerate slightly higher trace impurity levels.

The most important use of antimony is as a hardener for lead. Small additions significantly increase lead’s hardness and strength, making lead-antimony alloys the standard for battery grids and parts, ammunition, cable sheathing, and type metal. Antimony is also used in babbitt bearing alloys, pewter, solders, and as a raw material for antimony trioxide used in flame retardants.

Available in three forms: slabs for large melt additions, 1/2″ and down pieces for medium additions, and 8–20 mesh for fast dissolution and precise weighing.

Available Forms

1/2" and Down, 8 - 20 Mesh, Slabs

Product Code

10001

Technical Info

Thermal Properties

Melting Point (Solidus)1,167°F (631°C)

Melting Point (Liquidus)1,167°F (631°C)

Physical Properties

Density (imperial)0.241 lbs/in³

Density (metric)6.68 g/cm³

Primary ElementsSb

Lead FreeYes

Key Features

99.65% Minimum AntimonyEconomical Alternative to High GradeLead HardenerThree Forms for Different Melt Sizes

Solubility Note

add below the melt surface and stir to limit oxidation losses., Dissolves readily in molten lead at normal alloying temperatures

Nominal Composition

99.65% Sb

Choose 99.65% antimony when it is going into lead alloys and other applications where small amounts of trace elements have no effect on the finished product, such as battery alloys, ammunition, and general lead hardening. High Grade 99.85% antimony is the better choice for applications with tighter impurity limits, such as certain chemical, solder, and semiconductor uses. For most lead-hardening work, the 99.65% grade performs the same at a lower cost.

It depends on the application. Battery alloys typically use about 1–6% antimony, ammunition and shot alloys often use 0.5–6%, and type metals use roughly 10–25%. Even small additions make a noticeable difference: about 1% antimony substantially increases the hardness of pure lead.

Use slabs for large melts where the addition weight is substantial and handling time is not a concern. The 1/2" and down pieces suit medium-size additions and are easier to weigh accurately. The 8–20 mesh form dissolves fastest and allows precise weighing for small batches or final adjustments to alloy chemistry.