Foundry

Foundries melting grey iron, ductile iron and steel castings control three things in the ladle: dissolved oxygen, graphite morphology and final composition. Each is corrected at a defined point in the pour-to-mold sequence, and each calls for a different additive class. Get the timing or the grade wrong and you see shrinkage, chill, low nodule count or off-spec mechanical properties — defects that surface only after the casting is cut.

Deoxidation comes first. FeSi 75 (Si 74-78%, with size fractions from 10-50 mm lump down to 0-3 mm ladle grade) strips oxygen during tapping and sets the silicon base for graphitization. For ductile iron, magnesium treatment follows: FeSiMg nodulizer (typical Mg 5-10%, with controlled rare-earth) converts flake graphite to spheroidal form via sandwich, tundish-cover or cored-wire methods. Late inoculation then fixes nucleation — SiC and FeSi-based inoculants (FeSiBa, FeSiZr) raise graphite-nuclei count and cut chill in thin sections, with stream or in-mold addition at the lowest practical dosage. Recarburizer (calcined petroleum coke or calcined anthracite, often via cored wire) trims carbon to target, while HC FeMn handles manganese alloying.

Grade selection follows the part. Pearlitic ductile grades need a higher-Mn, controlled-residual approach; ferritic grades push for low S and tight inoculation; heavy sections demand barium- or zirconium-bearing inoculants to hold nucleation through slow cooling. Every lot ships with a COA and an EN 10204 3.1 inspection certificate (MTC) stating the heat analysis and size distribution. Foundries casting for EU-facing EAF or stainless supply chains also receive CBAM embedded-emissions documentation on request.

Supply runs on multi-regional sourcing held as Gebze bonded stock, with CIF Marmara delivery and 20 MT FCL or mixed-pallet shipments. A deoxidizer + nodulizer + inoculant + recarburizer order consolidates into one shipment, so a foundry receives the full ladle program together rather than chasing four lead times. RFQs are quoted with grade, size fraction and certification confirmed up front.