Silicon Metal 1101 3303 for Alloy Manufacturing Metallurgy and Aluminum Casting Applications

Some programs need both ends of the purity ladder at once: 1101 (Si 99.79%, Fe/Al ≤0.1%, Ca ≤0.01%) for metallurgy where trace elements are contractual, and 3303 (Si 99.37%, Fe/Al ≤0.3%, Ca ≤0.03%) for the aluminum casting volume that tolerates a wider window. Buying both grades from one supplier keeps the chemistry story coherent. ZhenAn casts both grades in Henan and pairs them under one commercial umbrella.

The pair runs on one smelting-and-casting platform, so document formats, sampling rules and dispatch contacts stay identical across both grades.

Three-tenths versus one-tenth on iron is the practical dividing line: casting programs live comfortably with 3303, while metallurgy that must certify low trace metals pays for 1101.

• Aluminum casting alloys: 3303 as the volume silicon source for Al-Si melts
• High-integrity metallurgy: 1101 where the specification names trace-metal ceilings
• Alloy manufacturing: master alloys and silicon-rich additions from certified lump
• Foundry operations: charging lump directly into melting furnaces
• Metallurgical programs: blending both grades against different product specs

• Tonnage split: which share of the program runs 1101 and which runs 3303
• Sizing per receiving line: one fraction or separate cuts for casting and chemistry
• Segregated loading whenever the two grades share a container
• Commercial terms set once for both grades: FOB, CFR or CIF, port named
• Dispatch at 5–10 working days per shipment after payment clears
• Verification through per-lot COA, with SGS or BV available at loading