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Cast-iron materials · Treatment alloys

Rare-earth ferrosilicon inoculant

A cast-iron inoculant family identified by an FeSi matrix and declared Ce/La or other rare-earth system. RE species, total, associated elements and applicable iron require SKU-by-SKU validation.

Rare-earth inoculationCandidate graphite nucleationCandidate trace-interference control
View grades and specifications
Rare-earth ferrosilicon inoculant · Product form reference
Product codeFD-INOC-REFESI
Industry application1
Key indicatorsRE species / RE total · Si / Fe · Ca / Al / sizing
Order boundaryQuotation and order confirmation

QUICK DECISION

Four answers before reading the technical detail

This section supports initial screening; final grade, addition and effects require operating conditions, formal documents and plant validation.

01

What it is

A cast-iron inoculant family identified by an FeSi matrix and declared Ce/La or other rare-earth system. RE species, total, associated elements and applicable iron require SKU-by-SKU validation.

02

What it does

  • Rare-earth inoculation
  • Candidate graphite nucleation
  • Candidate trace-interference control
03

Where it fits

  • Ladle, transfer, stream or in-mould inoculation point
04

Boundary not to miss

  • Incorrect selection or timing can cause under-/over-inoculation, slag entrainment, fade or structure variation

SELECTION BOUNDARY

Start with the selection boundary

GB/T 4137 rare-earth ferrosilicon is a chemistry-boundary reference, not automatically an inoculant SKU. Confirm RE species, active elements, narrow sizing, base-iron condition and trial results; more rare earth is not automatically better.

PRODUCT MANUFACTURING

Product manufacturing process

A cast-iron inoculant is generally made from verified FeSi-base alloy and a controlled active-element system by a supplier-declared smelting or remelt-alloying route, then cast, cooled, crushed to narrow sizing, de-fined, homogenised, sampled and tested. Formula, feeds and active-element control are supplier-specific; this page does not depict a Jinsheng-owned line.

  1. 01Rare-earth ferrosilicon inoculant must be verified as an FeSi-RE system for cast-iron inoculation. The supplier must declare RE elements such as Ce and La and the total-RE basis rather than using an undefined rare-earth label.
  2. 02Confirm the FeSi matrix, active-element feeds, returns and supplier's formal formula identity
  3. 03Complete controlled smelting or remelt alloying and chemical homogenisation by the manufacturer's route
  4. 04Cast, cool, crush, screen to narrow sizing and remove uncontrolled fines
  5. 05Homogenise and sample representatively, then test active elements, sizing, moisture and pack

SPECIFICATIONS & PACKAGING

Grades, specifications, indicators and packaging

An inoculant requires a formal SKU by matrix, active-element system and addition point; similar chemistry does not make inoculation performance interchangeable. The supplier TDS, SDS, sample COA and purchase agreement must fix Si, Fe, actual Ca, Ba, Sr, Zr, RE, Bi and other active elements, Al and limiting residuals, size distribution, fines, moisture, pack, sampling and change control. No fixed values are assumed.

  1. 01The specification must fix Si, Fe, total RE and actual rare-earth composition while controlling Ca, Al, Mg, P, S, sizing, fines, moisture, pack and RE test methods.
  2. 02Confirm grey iron, ductile iron or validated CGI use and the supplier's formal inoculant grade
  3. 03Fix the FeSi matrix, all active elements, limiting residuals and corresponding test methods
  4. 04Fix sizing, fines and moisture for ladle, stream, in-mould or another approved addition point
  5. 05Confirm moisture-protected pack, label, TDS, SDS, sample/lot COA and formula-change notification

GRADES & SPECIFICATIONS

Grades, specifications, indicators and packaging

Supply specifications, packaging, lead time and quality documents are subject to the formal quotation and order confirmation.

Grade / familyChemistrySize and formPackaging
Specification direction 01Rare-earth ferrosilicon inoculantConfirm grade, applicable standard and guaranteed values before quotation
  • RE species / RE totalConfirm in inquiry
  • Si / FeConfirm in inquiry
  • Ca / Al / sizingConfirm in inquiry

Confirm against the addition method, equipment and order requirements

Confirm pack format, net weight and labels in the quotation and order

ORDER SPECIFICATION CONFIRMATION

What must be confirmed before this becomes an order specification

Supply specifications, packaging, lead time and quality documents are subject to the formal quotation and order confirmation.

  1. 01Confirm the product, grade, application and supply scope
  2. 02Fix guaranteed chemistry, sizing, form and packing in the quotation and order
  3. 03Agree sampling, test methods, acceptance rules and lot COA fields
  4. 04Confirm the required TDS, SDS/PSI, labels and delivery documents

SELECTION AND COMPARISON

Compare specification directions by indicators and operating conditions

Supply specifications, packaging, lead time and quality documents are subject to the formal quotation and order confirmation.

01Specification direction

Rare-earth ferrosilicon inoculant

Compare the key indicators below, then confirm grade, guaranteed values, sizing and packing against the operating conditions.

Key indicators
RE species / RE totalSi / FeCa / Al / sizing
Size and form
Confirm against the addition method, equipment and order requirements
Packaging
Confirm in the quotation and order

INDUSTRY APPLICATION

Industry, furnace, material and addition point

Confirm the process position before method and quantity calculations; an application relationship for one furnace or material must not be copied to another.

01

Iron foundries

Ladle, transfer, stream or in-mould inoculation point

Furnace / equipment
Pouring system after cupola, induction or duplex melting
Material / output
Grey, ductile or compacted-graphite iron reviewed for melt S/O, temperature, section and target graphite form

APPLICATION METHOD

Application method and effect validation

The inoculation plan must be set from base-iron chemistry, S/O condition, temperature, holding and pouring time, section thickness, target graphite form and fade window. Validate a small trial by thermal analysis, wedge sample, microscopy and casting performance. Furnace silicon adjustment is not equivalent to pre-pour inoculation, and no fixed kg/t, chill reduction or graphite-count claim applies across iron types.

  1. 01Grade selection must consider base-iron S/O, interfering elements, target graphite, section thickness and fade window; an RE system is not an unconditional substitute for ordinary FeSi or another inoculant system.
  2. 02Confirm iron type, base-iron S/O, temperature, section thickness, pouring time and target structure
  3. 03Check lot COA, sizing and dry condition and set a small trial from the site baseline
  4. 04Add uniformly at the approved ladle, stream, in-mould or post-inoculation point and record fade time
  5. 05Use thermal analysis, chill, graphite form/count, carbides, defects and performance to decide approval, correction or stop
  6. 06Close by thermal analysis, chill, graphite, carbides, slag entrainment and casting performance, managing insufficient or excessive RE by trial.

PROBLEM AND SOLUTION

From operating objective to effect verification

Each application explains the role, method, quantity principle and risk boundary; the final proposal is confirmed against operating conditions and lot documents.

01

Iron foundries

Ladle, transfer, stream or in-mould inoculation point

Furnace / equipment
Pouring system after cupola, induction or duplex melting
Material / output
Grey, ductile or compacted-graphite iron reviewed for melt S/O, temperature, section and target graphite form
Method
Select an actual SKU from base-iron condition, inoculation point, sizing and fade time; add uniformly and close the loop with thermal analysis, chill and microscopy.
Quantity determination
Determine by trials from base-iron condition, section, treatment point, active elements and fade window; this page provides no fixed plant-independent kg/t rate.
Expected effects
  • Supports graphite nucleation and chill control under validated iron conditions
Limits and risks
  • Incorrect selection or timing can cause under-/over-inoculation, slag entrainment, fade or structure variation

STORAGE & SAFETY

Storage, handling and risk

  • Keep dry and lot-segregated and prevent mix-ups; dust, fume and hot-metal charging controls must follow the SDS/PSI for the actual form and plant procedures.
  • Without a formal SKU, TDS, SDS/PSI and lot COA, no chemistry, grade, sizing, pack, stock, dose, recovery or performance is promised.

This section does not replace the company's final SDS/PSI or the plant safety procedure.

REFERENCE AND ORDER BOUNDARY

Use industry references to understand, then order documents to confirm

Supply specifications, packaging, lead time and quality documents are subject to the formal quotation and order confirmation.

DOCUMENTS & MEDIA

Images, TDS, SDS and COA

Document availability depends on the product, lot, destination market and order agreement.

TDS

Confirms product identity, guaranteed indicators, sizing, form and packing.

SDS / PSI

Confirms storage, handling, protection and market-specific safety information.

COA

Links a specific lot to test items, results, methods and issue information.

INDUSTRY TECHNICAL REFERENCES

Selected external reference material

The following items come from licensed public media or original producer websites and explain similar products or typical processes only. They are not Jinsheng photographs, TDS, SDS or lot COA and create no supply commitment.

Blank COA template

COA field template (not a certificate)

A blank structure for lot, chemistry, sizing, method, disposition and issue data. It contains no test result and cannot be used for delivery.

Jinsheng blank COA field template · 2026-08-14Open field template ↗

SOURCES

Public references and verification dates

  1. GB/T 4137—2024 Rare-earth ferrosilicon alloy ↗Standard · 2026-08-19
  2. T/CFA 020207-1—2017 Silicon-based inoculants for cast iron ↗Standard · 2026-08-19
  3. Elkem cast-iron inoculant principles and product families ↗Manufacturer source · 2026-08-19

Public sources supplement general facts; they do not replace Jinsheng's formal product specification, TDS or lot COA.

INQUIRY PREPARATION

Prepare these operating conditions for a more precise technical response

Please provide the specification, quantity, destination, and contact information.

Already includedFD-INOC-REFESIRare-earth ferrosilicon inoculant
  1. 01Target industry, steel grade or casting material
  2. 02Furnace type, equipment, melt weight and current operating practice
  3. 03Measured chemistry, target chemistry and permitted residuals
  4. 04Planned addition point, temperature, slag and stirring conditions
  5. 05Current product, addition, recovery or operating-issue record
  6. 06Required size, form, packaging, quantity and destination
  7. 07Available melt analysis, microscopy, photographs or trial results

TECHNICAL AND QUOTATION CONSULTATION

Send the operating conditions for human review

Domestic inquiries are handled by the Domestic Sales Department and international inquiries by the International Sales Department. Price, availability and lead time are confirmed for each inquiry based on specification, quantity and delivery location.