ISO 5447:1980

Overview - ISO 5447:1980 ferrosilicomanganese specification

ISO 5447:1980 defines the specification and conditions of delivery for ferrosilicomanganese, a ferroalloy typically used in steelmaking and foundry applications. The standard covers the product definition, ordering information, chemical and physical requirements, sampling and testing protocols, and rules for despatch, packing and storage. It is intended for suppliers, purchasers and quality laboratories involved in the production, trade and use of ferrosilicomanganese.

Key topics and technical requirements

• Product definition: Ferrosilicomanganese is described as a master alloy of iron, manganese (≈60.0–75.0% mass) and silicon (≈10.0–35.0% mass) obtained by reduction.
• Ordering information: Orders should specify quantity, consignment constitution (tapped, graded or blended lot), chemical designation and particle size class.
• Consignment methods:
  • Tapped lot: single melt or part of a continuous tap.
  • Graded lot: several melts/parts of taps of the same designation (constituent melts must not differ by more than 3% absolute).
  • Blended lot: crushed and homogenized material from several melts.
• Chemical composition: Table 1 (in the standard) lists designations (e.g., FeMnSi12, FeMnSi22HP, FeMnSi30LP) and specified limits for Mn, Si and impurities (C, P, S, Fe). Compositions are subject to analytical and sampling precision.
• Particle size and tolerances: Particle classes 1–6 and associated undersize/oversize limits are given (see Table 2). Sizes are referenced to screening on steel sieves per ISO 565.
• Sampling & testing:
  • Sampling recommended per ISO 3713 (general rules); arbitration sampling and analysis procedures are described.
  • Chemical analysis preferably by methods in ISO 4139, ISO 4158 and ISO 4159 (Si, Al, Mn methods referenced). Suppliers must provide an analysis certificate and, on request, a representative sample.
• Despatch, packing and storage: Material must be free from extraneous contamination and transported, packed and stored according to applicable international regulations (examples: RID, IMDG Code).

Applications - who uses ISO 5447

• Steel producers and foundries specifying alloy feedstock for deoxidation and alloying.
• Ferroalloy manufacturers and traders preparing materials and certificates for sale.
• Quality control and testing laboratories responsible for sampling and chemical analysis.
• Logistics and procurement teams ensuring compliant packing, storage and delivery.

Related standards

• ISO 565 (test sieves)
• ISO 3713 (sampling of ferroalloys)
• ISO 4139, ISO 4158, ISO 4159 (chemical analysis methods)
• ISO 4551 and ISO 4555 (sieve and sampling methods under development/referenced)

Keywords: ISO 5447:1980, ferrosilicomanganese, ferroalloys, steelmaking, foundry, chemical composition, particle size, sampling, testing, delivery conditions.