Lead-freeConflict-Free CertifiedWidest Range of Supply FormsFood-Safe GradeStandard Industrial Specification
Conflict-free Grade A tin (99.85% Sn min) in granular, pig, bar, sheet, anodes, shot, wire, slab, and ingot forms for soldering, plating, alloying, and food-safe applications.
Grade A Tin 99.85% Minimum is a high-purity tin with a minimum composition of 99.85% Sn, sourced from the highest quality conflict-free suppliers, Forms: the widest range of supply forms of any tin product in the Belmont line. Grade A tin is the standard commercial specification for most industrial tin applications — the 99.85% minimum purity ensures consistent electrical conductivity, solderability, and corrosion resistance while remaining significantly less expensive than 99.99% ultra-pure grades. Tin’s unique combination of food safety, corrosion resistance, non-toxicity, and low melting point makes it the standard coating for food cans (tinplate), the base metal for most tin-base solders, the primary metal in pewter and bronze alloys, and an essential material in electronics manufacturing. Conflict-free certification is supplied with the material. Forms: granular, pig (approximately 55 lb), approximately 1 lb regular bars, sheet, cast flat anodes, 1/4 lb capping bar, wire, 2-5 lb ingot, 8-20 mesh shot, and slab forms to serve the complete range of casting, plating, alloying, and fabrication requirements.
Conflict-Free CertifiedWidest Range of Supply FormsFood-Safe GradeStandard Industrial Specification
Nominal Composition
Bal
99.85 Sn
Frequently Asked Questions
Common technical inquiries regarding Grade A Tin 99.85% Minimum
Conflict-free certification for tin means the metal has been traced through the supply chain to a smelter verified as not sourcing from conflict-affected and high-risk areas (CAHRAs) — primarily the Democratic Republic of Congo and adjoining countries where tin mining has historically funded armed conflict. The certification process uses the OECD Due Diligence Guidance for Responsible Supply Chains framework and is verified through audits by the Responsible Minerals Initiative (RMI) or equivalent body. Electronics manufacturers in the US and EU are required to report on conflict mineral sourcing under SEC Rule 13p-1 (US) and the EU Conflict Minerals Regulation — sourcing from a certified conflict-free supplier simplifies compliance documentation for customers in regulated industries.
Shot (8-20 mesh) is preferred for rapid dissolution in alloying additions to copper, bronze, and solder production heats — the high surface area speeds melt-in. Pigs are the standard bulk supply form for large production foundries and solder manufacturers where tons per day are consumed. Bars (1 lb) suit precision alloy laboratory batches and small production heats. Anodes are cut to size for electroplating applications. Wire (small diameter) is drawn for resistance-wound heating elements and specialized electrical applications. Granular form suits powder metallurgy and chemical synthesis. Sheet is for fabrication, lining, and anode production. The Belmont Grade A Tin line covers all these form requirements from a single grade of consistent material.
Tin pest (also called tin disease) is the spontaneous allotropic transformation of white tin (beta-tin, the normal form above 55°F) to gray tin (alpha-tin, a brittle powder) that occurs when pure tin is stored below approximately 55°F (13°C) for extended periods. The transformation nucleates at the surface and progresses inward, converting the coherent metal to a crumbling grey powder — a catastrophic failure mode. Grade A tin is at risk during cold storage below 55°F, particularly if nucleation sites (existing grey tin powder or contamination) are present. Trace impurities including bismuth, antimony, and lead at Grade A levels (below 0.15%) significantly inhibit tin pest formation — 99.99% ultra-pure tin is more susceptible. Store Grade A Tin above 65°F to eliminate risk.
99.85% pure tin powder, Forms: #100 atomized and 100 mesh grades. Melting point 449.5°F (231.9°C). Used for powder metallurgy, friction materials, soldering pastes, and sintered components.
High-purity SW grade tin powder. Melting point 449.5°F (231.9°C). Used for sintered components, friction materials, tin compound synthesis, and aerospace/electronics powder metallurgy.
