What it is
Molybdenum alloying for alloy steel, cast steel and alloyed cast iron to support hardenability, high-temperature strength and wear performance.
Special ferroalloys · Molybdenum series
Ferromolybdenum
Molybdenum alloying for alloy steel, cast steel and alloyed cast iron to support hardenability, high-temperature strength and wear performance.
Product codeFA-FEMO
Industry application2
Key indicatorsMo · Si / C / P / S / Cu · Sn / Sb / As / Pb / Bi
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.
What it does
- Molybdenum alloying
- Hardenability
- High-temperature/wear performance
Where it fits
- Furnace bulk alloying or ladle chemistry trimming
- Furnace alloying with pre-tap analytical trimming
Boundary not to miss
- Incomplete dissolution can segregate; excess Mo increases cost and may alter carbide systems
- Excess or segregation may form adverse carbides and reduce machinability/toughness
SELECTION BOUNDARY
Start with the selection boundary
Confirm target grade, net Mo increase, residual elements, charging equipment and heat treatment. High-purity superalloys may use pure molybdenum rather than FeMo.
PRODUCT MANUFACTURING
Product manufacturing process
Ferromolybdenum is generally made by metallothermic reduction of roasted technical molybdenum oxide with an iron source and reductants, followed by slag/metal separation, cooling, crushing and screening.
- 01Roast molybdenite concentrate to molybdenum oxide
- 02Batch oxide, iron source and reductants
- 03Aluminothermic/silico-aluminothermic reduction
- 04Separate slag/metal and cool
- 05Crush, screen, test and pack
SPECIFICATIONS & PACKAGING
Grades, specifications, indicators and packaging
Mo is the principal indicator, with Si, C, P, S, Cu and—where required—Sn, Sb, As, Pb and Bi. Grades such as FeMo60 become formal SKUs only after standard/TDS confirmation.
- 01Confirm Mo grade
- 02Check main content and residuals
- 03Select size for addition point
- 04Confirm drum/bag pack and lot COA
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 / family | Chemistry | Size and form | Packaging |
|---|---|---|---|
| Specification direction 01FerromolybdenumConfirm grade, applicable standard and guaranteed values before quotation |
| 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.
- 01Confirm the product, grade, application and supply scope
- 02Fix guaranteed chemistry, sizing, form and packing in the quotation and order
- 03Agree sampling, test methods, acceptance rules and lot COA fields
- 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
Ferromolybdenum
Compare the key indicators below, then confirm grade, guaranteed values, sizing and packing against the operating conditions.
- Key indicators
- MoSi / C / P / S / CuSn / Sb / As / Pb / Bi
- 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.
Steelmaking plants
Furnace bulk alloying or ladle chemistry trimming
- Furnace / equipment
- EAF, LF and ladle
- Material / output
- Alloy, stainless and tool steels
Iron foundries
Furnace alloying with pre-tap analytical trimming
- Furnace / equipment
- Induction, duplex or special EAF route
- Material / output
- Mo-alloyed grey, ductile, CGI and wear-resistant irons
APPLICATION METHOD
Application method and effect validation
Calculate from net Mo increase, measured Mo and site recovery, deducting residual Mo in scrap/returns. Ensure dissolution and verify by melt analysis.
- 01Confirm target and residual Mo
- 02Choose early furnace addition or ladle trimming
- 03Ensure temperature, time and stirring
- 04Resample and evaluate with heat treatment
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
Steelmaking plants
Furnace bulk alloying or ladle chemistry trimming
- Furnace / equipment
- EAF, LF and ladle
- Material / output
- Alloy, stainless and tool steels
- Method
- Add large lumps early with adequate heat/time/stirring; late fine additions need oxidation/dust control, followed by steel-sample verification.
- Quantity determination
- Calculate from net Mo increase, measured Mo and site recovery, deducting residual Mo in scrap/returns.
Expected effects
- Supports hardenability, tempering stability and high-temperature performance
Limits and risks
- Incomplete dissolution can segregate; excess Mo increases cost and may alter carbide systems
02
Iron foundries
Furnace alloying with pre-tap analytical trimming
- Furnace / equipment
- Induction, duplex or special EAF route
- Material / output
- Mo-alloyed grey, ductile, CGI and wear-resistant irons
- Method
- Add to grade design and ensure dissolution; ductile/CGI grades still require separate nodularising/CGI treatment and inoculation.
- Quantity determination
- Calculate from target Mo, residual in returns and recovery.
Expected effects
- Influences hardenability, high-temperature strength and wear matrix/carbides
Limits and risks
- Excess or segregation may form adverse carbides and reduce machinability/toughness
STORAGE & SAFETY
Storage, handling and risk
- Keep dry and control crushing dust; manage handling and PPE under the final SDS.
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.
Official FeMo 65/75 PDS
A Climax Molybdenum product data sheet; a producer document, not a Jinsheng TDS.
Climax Molybdenum · 2026-08-14Open reference ↗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
- GB/T 3649—2008 Ferromolybdenum ↗Standard · 2026-08-14
- Climax molybdenum products and production ↗Manufacturer source · 2026-08-14
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 includedFA-FEMOFerromolybdenum
- 01Target industry, steel grade or casting material
- 02Furnace type, equipment, melt weight and current operating practice
- 03Measured chemistry, target chemistry and permitted residuals
- 04Planned addition point, temperature, slag and stirring conditions
- 05Current product, addition, recovery or operating-issue record
- 06Required size, form, packaging, quantity and destination
- 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.