Incoloy 925 Seamless Tube

Incoloy 925 Seamless Tube – High-Strength Corrosion-Resistant Solution

TSM Technology's Incoloy 925 Seamless Tube delivers where standard alloys fall short. This age-hardenable nickel-iron-chromium tube (UNS N09925) achieves yield strength up to 758 MPa while resisting chloride stress-corrosion cracking in H₂S environments. We have a 60,000 square meter workshop with more than 100 precise machinery and a production capacity of 100-200 tons/month. We strictly conform to ASTM B423, NACE MR0175 and API 5CRA regulations. All products are ultrasonically tested, hydrostatically verified, and PMI-analyzed for zero-defect performance in the most demanding applications.

What Are Incoloy 925 Seamless Tubes? 

The product is a nickel alloy, age-hardenable for severe service conditions.

Unlike welded alternatives, our seamless architecture has no longitudinal weld seams (the weakest link in high pressure systems). This tube provides the corrosion resistance of Incoloy 825 with the precipitation hardening capacity of titanium and aluminum additions.

This makes for strength and chemical resistance in a single material. It’s perfect for settings where hydrogen sulfide, carbon dioxide and chlorides destroy standard steels. Your equipment remains on line longer, eliminating expensive downtime.

Specifications

Physical and Chemical Properties

Product Standards

Your initiatives need verified compliance. Our tubes are designed for:

• ASTM B423 — Standard standard for seamless nickel-iron-chromium alloy tubes
• ASTM B829 - Specification for Nickel Alloy Tubing
• ASME SB 423 - Boiler and Pressure Vessel Code
• API 5CRA – Specification for corrosion-resistant alloy seamless tubes for oil and gas production
• NACE MR0175/ISO 15156 — Materials for use in H2S-containing settings
• JIS, DIN, EN - International equivalents supported

3rd-party certifications (MTC, SGS, BV, TUV) are standard with all shipments.

What Are the Features of Incoloy 925 Seamless Tube?

Age-Hardening Capability

Heat treatment elevates yield strength beyond conventional austenitic stainless steels. You gain structural integrity without adding bulk.

Seamless Construction

Zero longitudinal welds mean no weak zones. This design prevents premature failure under cyclic loading.

Superior Corrosion Resistance

High Pitting Resistance Equivalent Number (PREN) for resistance to chloride pitting, crevice corrosion and sulfide stress cracking

Wide Temperature Range

Dependable performance from Cryogenic to 550°C. Your activities remain steady over temperature cycles.

Dimensional Precision

Our tight tolerances and polished finishes reduce installation time and seal failure risks.

Applications

Downhole Oil and Gas

Production tubing, tool joints and polished bore receptacles for sour gas wells. This tube retains its mechanical integrity even when H₂S and CO₂ concentrations surge.

Subsea Engineering

Deepwater piping systems, high strength fasteners, wellhead components. Your infrastructure will not be affected by seawater corrosion and pressure.

Chemical Processing

Valves, pumps and heat exchangers for phosphoric and sulphuric acids The seamless construction prevents leaks even under intense chemical assault.

Marine Equipment

Shafting and structural components where Incoloy 925 Seamless Tube saltwater exposure is constant. You avoid the galvanic corrosion issues plaguing traditional materials.

Factory 

Our 60,000㎡ modern facility houses:

• Advanced vacuum melting furnaces for impurity-free ingots
• Multi-stage extrusion and pilgriming lines for seamless tube production
• In-house heat treatment furnaces with precise temperature control
• Comprehensive NDT laboratories equipped with UT, ET, and radiographic systems
• Climate-controlled storage areas maintaining material integrity

Every production stage follows strict ISO protocols, ensuring your Incoloy 925 Seamless Tube meets specification.

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What Is the Production Process of Incoloy 925 Seamless Tube?

1. Material Selection

We get high quality nickel, chromium and molybdenum from approved vendors. The chemical composition is checked before melting.

2. Melting under vacuum

Homogeneous ingots are produced in electric arc furnaces in regulated atmospheres. This removes the contaminants that cause it to be brittle.

3. Hot-Extrusion

Hot billets are perforated and extruded via mandrels to produce seamless tubing. No welding = consistent wall thickness.

4. Cold Pilgrimage

The final proportions and an improved surface polish are obtained via precision cold working. Your tubes are ready to connect.

5. Solution Annealing

The tubes are heated to 1775°F (968°C) then immediately cooled. This dissolves precipitates and prepares it for age hardening.

6.Age hardening (precipitation hardening)

Maximum strength is obtained by aging at 1300oF (704oC) for 8 hours with production of titanium and aluminum carbide.

7. Final Inspection

Every tube passes ultrasonic testing, eddy current inspection, and hydrostatic pressure testing before shipment.

Quality Inspection

TSM Technology's multi-tier inspection protocol guarantees performance:

• Hydrostatic Testing: Verifies pressure containment per API 5CRA
• Ultrasonic Testing (UT): Detects internal flaws per ASTM E213
• Eddy Current Testing (ET): Identifies surface discontinuities per ASTM E426
• Mechanical Testing: Tensile, hardness (Rockwell C), and Charpy impact tests confirm age-hardening success
• Positive Material Identification (PMI): X-ray fluorescence ensures chemical compliance
• Corrosion Resistance Testing: Intergranular corrosion (ASTM G28) and SSC tests validate NACE compliance

Full traceability documentation (MTR, QAC, ITP) accompanies every order.

Size inspection

Ultrasonic Testing (UT)

Why Choose TSM Technology?

14+ Years of Alloy Expertise

We've solved material challenges for clients in 70+ countries. Your application benefits from proven engineering knowledge.

AS9100D Certified Manufacturing

Aerospace-grade quality control ensures every tube meets the tightest tolerances. Our certifications include ISO 9001 and AS9120.

100+ Precision Machines

From melting to final inspection, our integrated production line delivers consistency. No outsourcing means faster turnaround.

Customer-First Service

Technical consultation, custom sizing, and fast response times. We're your partner, not just a supplier.

Global Logistics Network

Our Hong Kong hub ensures timely delivery worldwide. You get your materials when you need them.

Packaging and Shipping

Packaging

• Plastic caps protect tube ends from contamination
• Bundles secured with steel straps
• Wooden cases or pallets for export (fumigation-certified)
• Material markings and heat numbers clearly labeled

Shipping

• Sea freight for bulk orders (FOB, CIF, CFR terms available)
• Air freight for urgent requirements
• Full insurance and tracking provided
• Documentation: Commercial invoice, packing list, MTR, certificate of origin

FAQ

Q: What's the difference between Incoloy 825 and Incoloy 925?

A: Incoloy 925 is age hardenable, and may be heat treated to reach greater strength. Incoloy 825 has high corrosion resistance but cannot be precipitation hardened to improve mechanical strength.

Q. Do you have a NACE MR0175 sour service compliant tube?

A: Yes. The heat treatment procedure we use guarantees the material satisfies the hardness and corrosion resistance standards of NACE MR0175/ISO 15156. Full compliance documentation available.

Q: Can these tubes be welded successfully?

A: Seamless tubes do not have any weld seams. If joining is required, utilize filler metals such as Inconel 725 or 625. With proper heat treatment before and after welding, corrosion resistance and strength is maintained.

Q: What's the typical lead time for custom sizes?

A: Standard sizes ship within 20–25 days. Custom dimensions require 35–45 days depending on order volume. Stock items (common sizes) can ship within 7 days.

Q: How do you ensure dimensional accuracy?

A: Our cold pilgriming process achieves tight tolerances of ±0.1mm on wall thickness and ±0.5mm on outer diameter. Final inspection uses laser micrometers and CMM equipment for verification.

Contact Us

Ready to specify Incoloy 925 Seamless Tube the right tube for your project? Our technical team is standing by to assist with material selection and custom requirements.

Email: info@tsmnialloy.com