Incoloy 925, also known as Alloy 925 or UNS N09925, is an age-hardenable nickel-iron-chromium alloy containing molybdenum, copper, titanium and aluminum. It combines corrosion resistance with high strength after suitable heat treatment. The alloy is commonly considered for oil and gas equipment, particularly components exposed to demanding downhole and sour-service environments.

At MWalloys, we coordinate supply enquiries for Incoloy 925 in forms including round bars, forging stock and seamless tubes. The applicable product specification, material condition, dimensions, inspection scope and manufacturing mill should be confirmed for each order. For a quotation, please provide the UNS designation, product form, dimensions, quantity and any project-specific requirements.

1. Incoloy 925 Material Identification

The material designation and governing product standard should appear clearly in the purchase order. Werkstoff 2.4852 is a commonly published cross-reference for Alloy 925, but the UNS number and agreed product specification should take priority when documents or supplier designations differ.

2. Chemical Composition and Typical Properties

The following composition is a published reference for Alloy 925. The actual heat analysis and acceptance limits must be checked against the governing purchase specification and the manufacturing mill's material certificate.

Selected physical reference values:

Representative Mechanical Properties

Alloy 925 can be supplied in different metallurgical conditions. The following values are representative data published for round products; they are not universal acceptance limits for every diameter, product form or manufacturing route.

The required mechanical properties should be specified together with the product form, dimensions, heat-treatment condition and applicable standard. Do not assume that a bar, tube and forging will have identical mechanical properties simply because they carry the same UNS designation.

3. Product Forms and Applicable Standards

We review Incoloy 925 enquiries according to the actual product form rather than applying one general standard to every supply type.

For Alloy 925 seamless pipe and tube, ASTM B983 specifically covers high-strength seamless nickel alloy pipe and tube that includes UNS N09925. For bars and rods, ASTM B805 is the relevant product specification to review.

Forgings should be quoted against an agreed mill specification, drawing or project requirement. A standard used for another nickel alloy should not automatically be assumed to cover UNS N09925. Where API 6ACRA is required, its applicability should be checked against the intended oil and gas equipment and component scope.

4. Technical Considerations Before Ordering

Material Condition and Heat Treatment

Alloy 925 is age-hardenable. Its final strength depends on the material condition and heat-treatment route. Buyers should state whether they require solution-annealed material, solution-annealed and aged material, or another condition permitted by the governing specification.

For bars, confirm whether the material is supplied in a solution-treated condition suitable for subsequent aging or in the final aged condition. For seamless tubes, confirm the permitted condition under the agreed product specification. The required condition should be reflected in the mill documentation.

Sour-Service Requirements

When the material is intended for H₂S-containing environments, specify the applicable edition of NACE MR0175 / ISO 15156-3 and the actual service conditions. These may include H₂S partial pressure, temperature, chloride concentration, pH and other relevant environmental factors.

The alloy designation alone does not establish suitability for every sour-service environment. Metallurgical condition, hardness and service limits must be reviewed against the applicable requirements. Any compliance statement should be supported by the relevant manufacturing and inspection documentation.

Dimensions, Tolerances and Surface Condition

For round bars, provide the diameter, cut length, quantity, dimensional tolerance and required surface condition, such as hot-finished, peeled or machined. For seamless tubes, specify outside diameter, wall thickness, length, tolerance and end preparation.

For forgings, provide a drawing or dimensional sketch, required machining allowance, final dimensions and inspection requirements. If the order involves multiple sizes, list each size and quantity separately.

Inspection and Traceability

Inspection requirements should be agreed before production or sourcing. Depending on the project, buyers may request chemical analysis, tensile testing, hardness testing, ultrasonic testing, grain-size examination or positive material identification.

Where traceability is required, specify the marking arrangement and the information needed on each piece. The heat number, material grade and dimensions should be traceable to the corresponding manufacturing documentation.

5. Example of a Buyer Inquiry

The following is an example of a customer inquiry concerning Incoloy 925. It is reproduced as received for reference. It is not a statement of MWalloys' current stock, standard size list, production capacity or confirmed supply scope.

Our plan is to market your products in Argentina on a regular basis, so we are looking for a long-term supplier. We would like to receive your price list and offer for the items below.
Product
Incoloy 925 (UNS N09925).
Forms: round bars (hot finished or peeled, solution annealed or aged), forgings, and seamless tubes (ASTM B444, B423, B163 or B622).
Sizes
Bars from 10 to 300 mm diameter; please send your full size list.
Seamless tubes from 6 to 114 mm OD; please send your size list.
Testing and documentation
Melting route (VIM, VAR or ESR) stated on the certificate.
Ultrasonic test, grain size and hardness;
Compliance with NACE MR0175/ISO 15156-3, stated on the certificate.
Inspection certificate EN 10204 type 3.1 issued by the manufacturing mill itself, showing the mill name, heat number, chemical analysis and mechanical test results. If you are not the manufacturer, please name the mill and supply the mill's original certificate, not one issued by your company.
Marking with grade, size and heat number on every piece, so that each piece can be traced to its certificate.
Certificate of origin.
Export packing suitable for sea freight. Wooden cases, pallets and battens must be ISPM 15 treated and marked, as required for import into Argentina.
Optional, please quote separately: EN 10204 type 3.2 certificate with third-party inspection, and 100% PMI.
Minimum order, lengths and volume discounts
We do not have fixed quantities yet, because they will depend on our customers' orders. Please tell us your standard terms:
Minimum order quantity (MOQ) per size and per order.
Standard lengths you supply (random and fixed), with the length tolerance.
Volume discounts: from which quantities your price goes down and by what percentage. Please propose your own quantity breaks, with the lead time for each.
Whether you offer supply agreements in which the discount grows with the committed volume.
Please include in your offer
Prices in USD per kg (and per meter or per piece where usual), FOB (Chinese port) and CIF Buenos Aires, Argentina.
Your stock list for these items, and the sizes you can produce to order.
If possible, the price list of your standard products and sizes.
Theoretical weight and invoicing basis (theoretical or actual weight).
Your standard export packing.
Payment terms and offer validity.
Your mill approvals and certifications (for example ISO 9001, ISO 14001, PED 2014/68/EU, AD 2000-Merkblatt W0, API, NORSOK) and the oil and gas companies that have approved you as a supplier.
Your monthly production capacity for these items, and whether you can hold stock for our regular orders.
How you adjust prices when nickel, chromium and molybdenum prices change, and whether you can fix prices for three or six months under a supply agreement.
What you do if the material does not meet the specification (replacement, credit note, return freight).
Whether you accept inspection before shipment at your mill, by us or by a third-party inspector we appoint.

6. Quality Documents and Inspection Arrangements

The documentation required for Incoloy 925 should be agreed before the order is placed. A material test certificate, a certificate of origin and a third-party inspection report serve different purposes and should not be treated as interchangeable.

Our standard shipment documentation includes a material test certificate (MTC) and a certificate of origin. Where a buyer requires an EN 10204 type 3.1 certificate issued by the manufacturing mill itself, we confirm the actual source mill and certificate issuer before finalizing the offer. The availability of an original mill-issued certificate must be verified for the specific supply route.

Additional inspections or documents, such as third-party inspection, EN 10204 type 3.2, 100% PMI, ultrasonic testing or grain-size examination, are subject to technical confirmation and separate quotation. Please list these requirements in the RFQ rather than adding them after production has started.

For timber export packaging, state the destination and any applicable ISPM 15 treatment and marking requirements. Packaging arrangements should be confirmed for the actual shipment.

7. MWalloys Supply and Order Coordination

MWalloys coordinates nickel-alloy supply through its own production resources and partner manufacturers. The actual source mill and supply route depend on the product form, dimensions, technical requirements and order conditions. We confirm the relevant supply details during quotation rather than presenting another manufacturer's equipment, stock or certificates as our own.

For planning purposes, our general lead-time references are:

• Stock items: typically around 7–15 days after matching stock has been confirmed.
• Custom orders: typically around 30–45 days, depending on the dimensions, quantity, processing difficulty and inspection scope.

These are general planning references, not guaranteed lead times for every Incoloy 925 size or order. Stock availability, MOQ, production capacity and price are confirmed individually.

Our standard payment term is T/T, with 30% advance payment and the remaining 70% payable before shipment. MTC and certificate of origin are supplied with the shipment. Any additional third-party inspection or certification costs are quoted separately.

For a long-term supply enquiry, please provide your estimated annual demand, expected order frequency and likely size range. This allows us to review suitable sourcing arrangements and discuss volume-based commercial terms against a defined purchasing plan.

8. Typical Applications

Alloy 925 is used in applications where corrosion resistance and age-hardened strength are both important. Published applications include downhole and surface equipment for oil and gas wells, valves, hangers, landing nipples, tool joints and packers. Other applications include high-strength fasteners, marine components, pump shafting and selected piping systems.

The suitability of Alloy 925 depends on the actual operating environment, design requirements and applicable material specification. For sour-service projects, the environmental limits and material condition should be reviewed before ordering.

9. How to Request an Incoloy 925 Quotation

To help us review your requirement, include the following information in your enquiry:

1. Material: Incoloy 925 / UNS N09925.
2. Product form: round bar, forging or seamless tube.
3. Dimensions: diameter or outside diameter, wall thickness where applicable, length and tolerances.
4. Condition: solution annealed, aged or another specified condition.
5. Quantity: pieces, total length or estimated weight, with each size listed separately.
6. Standard and service requirements: ASTM or API specification, NACE MR0175 / ISO 15156-3 edition and relevant service conditions.
7. Inspection and documents: MTC, original mill-issued 3.1 where required, UT, hardness, grain size, PMI or third-party inspection.
8. Delivery: destination, preferred Incoterm and packaging requirements.

Send your drawings, technical specification or purchase list together with the enquiry. We will review the product form, material requirements and sourcing conditions before preparing a quotation.

10. Frequently Asked Questions

Is Incoloy 925 the same as UNS N09925?

Yes. UNS N09925 is the unified numbering designation for Alloy 925, also known as Incoloy 925.

What is the Werkstoff number for Incoloy 925?

Werkstoff 2.4852 is a commonly published material reference for Alloy 925. For procurement and traceability, specify UNS N09925 and the applicable product standard in the purchase order.

Which ASTM standard applies to Incoloy 925 round bars?

ASTM B805 is the relevant standard to review for Alloy 925 bars and rods. Confirm the applicable edition, delivery condition and dimensional requirements with the source mill.

Which ASTM standard applies to seamless Incoloy 925 tubes?

ASTM B983 specifically covers high-strength seamless nickel alloy pipe and tube that includes UNS N09925. The required dimensions, condition and inspection scope should be stated in the enquiry.

Does Incoloy 925 automatically comply with NACE MR0175 / ISO 15156-3?

No. Suitability depends on the specified material condition, hardness and actual sour-service environment. State the applicable edition and service conditions so that the requirement can be reviewed and documented.

Can MWalloys provide an original EN 10204 type 3.1 certificate?

We confirm the actual source mill and certificate issuer for the specific order. Where an original mill-issued 3.1 certificate is mandatory, this requirement must be agreed and verified before the order is confirmed.

What are the typical lead times?

As general planning references, verified stock items typically require around 7–15 days, while custom orders generally require around 30–45 days. The final delivery schedule depends on the size, quantity, sourcing route and inspection requirements.