Incoloy 825 Seamless Tube

Incoloy 825 Seamless Tube – High-Performance Corrosion-Resistant Tubing Solution

TSM Technology manufactures premium Incoloy 825 Seamless Tube with exceptional corrosion resistance and mechanical integrity. Our products feature a monthly capacity of 100–200 tons, produced in our 60,000㎡ ISO 9001, AS9100D, and AS9120 certified facility. Each tube undergoes ultrasonic testing, eddy current testing, and intergranular corrosion testing to ensure zero weld-seam failures and superior structural reliability. With over 15 years of experience supplying to 70+ countries, we deliver customized solutions from OD 6–219 mm with full material traceability (MTC, SGS, BV, TUV). Our advanced manufacturing ensures your critical applications benefit from proven chloride SCC resistance and high-pressure performance.

What are the Incoloy 825 Seamless Tubes?

Molybdenum, copper, and titanium are included in the product, which is a nickel-iron-chromium alloy tube. The HAZ (Heat Affected Zone) vulnerabilities of its welded equivalents are eliminated by the seamless construction. Because of this, it works effectively in environments with high pressure and severe acids.

This alloy reduces the performance difference between expensive nickel alloys and traditional stainless steels. It covers significant subjects such intergranular corrosion, pitting corrosion in stagnant environments, and chloride stress corrosion cracking. Titanium stabilises the material to prevent temperature sensitisation.

Specification

Physical and Chemical Properties

Chemical Composition (%)

Physical & Mechanical Properties

Product Standards

We manufacture according to internationally recognized standards:

• ASTM B423 – Seamless Pipe and Tube
• ASTM B829 – Seamless Tube for Heat Exchangers
• ASME SB423 – Boiler and Pressure Vessel Code
• JIS, DIN – Regional specifications for global compliance

All products include full traceability documentation: QAC, ITP, and MTR.

What are the Features of Incoloy 825 Seamless Tube?

Superior Corrosion Resistance

Chloride stress corrosion cracking is prevented by the high nickel concentration. Resistance to phosphoric and sulfuric acids is improved by copper.

Seamless Construction

No weld seams mean higher pressure ratings and zero risk of weld decay in volatile chemical transfers.

Excellent Mechanical Strength

Retains tensile strength at cryogenic temperatures down to 540°C (1000°F).

Intergranular Corrosion Protection

Titanium stabilisation inhibits the precipitation of chromium carbides on grain boundaries.

Temperature Range (Wide)

Works dependably in applications for both low and high temperatures.

Application

Incoloy 825 Seamless Tube serves three primary high-stakes environments:

It also handles nitric acid and organic acid mixtures in highly oxidative environments.

1. Oil and Gas Production

Used as downhole tubing in sour gas wells containing H2S and CO2. Its resistance to sulfide stress cracking is critical.

2. Chemical Processing

Deployed in heat exchangers, evaporators, and scrubbers for sulfuric acid production. The copper content prevents rapid material thinning.

3. Marine and Nuclear Industries

Applied in seawater-cooled heat exchangers and nuclear fuel reprocessing equipment. Seamless construction prevents crevice corrosion in stagnant zones.

Factory 

TSM Technology operates a modern production facility equipped with:

• High-precision cold drawing machines
• Advanced heat treatment furnaces
• In-house NDT inspection laboratory
• Automated cutting and packaging systems

Our integrated supply chain ensures consistent material quality from raw material sourcing through final delivery.

Production and Processing Technology

Our manufacturing process ensures dimensional precision and material consistency:

• Melting – High-purity raw materials sourced from qualified suppliers
• Forging and Extrusion – Produces solid billets with uniform grain structure
• Cold Drawing – Achieves tight tolerances and superior surface finish
• Heat Treatment – Solution annealing at controlled temperatures
• Straightening and Cutting – Precision machining to customer specifications

What is the Production Process of Incoloy 825 Seamless Tube?

Step 1: Material Selection

We provide high purity Incoloy 825 ingots in compliance with ASTM B424.

Step 2: Hot Extrusion

Hollow tubes are produced by heating and pushing billets through precise dies.

Step 3: Cold Working

Multiple passes of cold drawing lower the diameter and wall thickness and improve the mechanical characteristics.

Step 4: Solution Annealing

Tubes are heat treated in controlled atmospheres to re-establish corrosion resistance.

Step 5: Finishing the surface

Polishing and pickling according to client need. Bright annealing.

Step 6: Inspection and Testing

Final quality verification before packaging.

Quality Inspection

Your Incoloy 825 Seamless Tube undergoes rigorous testing to ensure long-term reliability:

• Ultrasonic Testing (UT) – Detects internal flaws
• Eddy Current Testing (ECT) – Identifies wall thickness variations
• Hydrostatic Testing – Verifies pressure integrity
• Positive Material Identification (PMI) – Confirms chemical composition
• Intergranular Corrosion Test (ASTM A262) – Ensures titanium stabilization effectiveness
• Mechanical Testing – Tension, flattening, and flaring tests
• Microscopic Grain Analysis – Validates grain size uniformity

Every product includes comprehensive test reports.

Package and Shipping

• Packing: Wooden boxes, steel frames or as per customer’s requirements for export packing.
• Protection: Plastic caps on the ends of tubes, moisture-proof wrapping
• Shipping: Airfreight, sea freight or express courier.
• Logistics: Global reach organised via our Hong Kong hub
• Documents: Commercial Invoice, Packing List, Certificate of Origin, Test Reports
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FAQ

Q: What are the benefits of Incoloy 825 over Incoloy 800?

A: Incoloy 825 is molybdenum and copper containing, and provides much improved water corrosion and reducing acid resistance over the 800 series.

Q: Is the product safe for use in boiling sulfuric acid?

A: Yes, it shows good resistance at boiling temperatures in sulfuric acid concentrations up to 40%. At lower temperatures it resists all concentrations.

Q: Is the tube capable of sensitisation?

A: No. The inclusion of titanium prevents the formation of chromium carbides at the grain boundaries, stabilising the alloy against intergranular corrosion.

Q: Why seamless tubes for Incoloy 825 over welded tubes?

A: Higher pressure ratings and no danger of weld degradation. This makes them safer for high temperature, high volatility chemical transmission.

Q: What are the typical size ranges?

A: Most manufacturers produce from OD 6 mm up to 219 mm. TSM Technology may manufacture bespoke measurements to your specifications.

Q: Do you provide material test certificates?

A: Yeah. MTC (Mill Test Certificate) is provided with every shipment and third party certifications such as SGS, BV or TUV are available upon request.

Q: What is your minimum order quantity?

A: Our MOQ is 50kg. We maintain stock for common sizes to support urgent orders.

Contact Us

Ready to source high-quality Incoloy 825 Seamless Tube for your project? Contact our technical team today at info@tsmnialloy.com for quotations, specifications, and expert consultation.