FeSiMn

Ferro Silicon Manganese

Ferro Silicon Manganese (FeSiMn) is a dual-function ladle and furnace addition that combines manganese alloying with silicon-driven deoxidation in a single charge. The Si fraction (14-22%) scavenges dissolved oxygen to form fluid manganese-silicate inclusions that float into the slag, while Mn (65-72%) raises hardenability and ties up sulphur, reducing FeMn and FeSi consumption per heat. Lower silica activity gives cleaner steel than separate FeMn plus FeSi additions. It is used in EAF and BF-BOF deoxidation, low- and high-Mn structural and manganese steels, alloy and welding-electrode production. Typical EAF dosage runs 0.5-1.2 wt% of the heat, adjusted to tap oxygen and target chemistry. This grade holds C ≤ 2.0%, P ≤ 0.20%, S ≤ 0.03% at 10-60 mm sizing, meeting ASTM A483 / ISO 5447 for consistent recovery. Each lot ships with COA and MTC, XRF/ICP-verified, on multi-regional sourcing with CIF Marmara delivery, Gebze bonded stock, and 20 MT FCL or 5 MT LCL lots. Send heat chemistry and tonnage for an RFQ.

Technical Specifications

Mn	65-72%
Si	14-22%
C	≤ 2.0%
P	≤ 0.20%
S	≤ 0.03%
Size	10-60mm

Arsam Standard

Grades	FeSiMn (Mn 65-72%, Si 14-22%)
International Reference	ASTM A483 · ISO 5447
Packaging	1 MT jumbo big bag · Palletized · FCL container
Documentation	COA (EN 10204 3.1) · MTC · Radiation certificate · CoO · EUR.1 / A.TR (EU)
Quality Control	XRF/ICP · 0.5-1.2 wt% EAF dosage reference
Minimum Order	20 MT FCL / 5 MT LCL
Incoterms	FOB / CIF / CFR / DAP
Lead Time	Sea CIF 28-35 days · Gebze bonded stock 24-48h · alternative road/ferry 12-21 days

International standards are a reference basis; certificates provided on request with document verification.

Applications

Steel deoxidation

Alloy production

Welding materials

Manganese steel

Frequently Asked Questions

What is the typical FeSiMn dosage for EAF?

0.5-1.2 wt% FeSiMn for EAF deoxidation + alloying (targeting bath Mn 0.5-1.0%). For large EAFs, typical monthly consumption is 400-800 tons. Dosage decided by the line metallurgy chief.

When I receive Mn ≥62% spec, what should the actual COA show?

Arsam canonical spec: Mn 65-72%, Si 14-22%, C ≤2.0%, P ≤0.20%, S ≤0.03%. COA + MTC + radiation certificate per lot. SGS/BV inspection option standard for MENA customers.

FeSiMn vs separate FeMn + FeSi, which is more cost-effective?

A single FeSiMn lot for combined EAF deoxidation + alloying delivers approximately $5-8 per ton cost advantage (vs. separate FeMn + FeSi). Plus, a single container = logistics + handling savings. Separate use only for specific metallurgical discipline.

What is the FeSiMn lot delivery time?

Sea freight CIF Mersin/İskenderun 28-35 days. Alternative road/ferry route 12-21 days. Dubai bonded warehouse for MENA customers 3-5 days. Turkish EAFs prefer tender-based annual frame contracts.