Antimony in fragments at least 99.65% pure
Antimony in fragments at least 99.65% pure
Antimony in fragments at least 99.65% pure. Antimony is a crucial hardening agent added to lead for bullet casting to prevent leading in barrels and improve performance at higher velocities. Typically, 2% to 6% antimony is used, often combined with small amounts of tin (e.g., 92% Lead, 2% Tin, 6% Antimony, known as “Hardball” alloy). It is rarely used in its pure form due to a high melting point, usually added via alloys like Linotype (12% antimony) or 30/70 antimonial lead.
This antimony is sold in fragments and approximate wieghts equating to 9000Ft per kilo
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9 000 Ft
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Antimony in fragments at least 99.65% pure
Key Aspects of Antimony in Casting
- Purpose: Increases hardness and reduces brittleness, making it ideal for high-velocity handgun and rifle bullets.
- Optimal Mixtures:
- Hardball Alloy (92-2-6): 92% Lead, 2% Tin, 6% Antimony.
- Linotype: 84% Lead, 4% Tin, 12% Antimony.
- "Superhard" Alloy: A mix of 70% Lead and 30% Antimony is used to harden soft lead.
- Melting and Mixing: Pure antimony melts at ~1167°F, far higher than lead's ~621°F, making it difficult to blend directly. It is best added via pre-mixed alloys (e.g., Rotometals' Superhard 70/30 or Linotype).
- Hardness: A mix of 1 lb of Linotype to 6 lbs of range scrap produces a good hard bullet.
- Sources: Rotometals, Brownells, and other bullet casting suppliers sell antimony-rich alloys.
Usage Tips
- Water Quenching: Water quenching cast bullets can add extra Brinell hardness points to the alloy.
- Safety: When melting, work in a well-ventilated area, as fumes can be toxic.
Additional information
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