Incoloy 800H Seamless Tube

Incoloy 800H Seamless Tube – High-Temperature Performance Alloy Tubing

Incoloy 800H Seamless Tube from TSM Technology delivers exceptional creep resistance and structural stability for your most demanding applications. Our seamless tubes are manufactured for continuous use at temperatures over 600°C with regulated carbon content of 0.05-0.10% and coarse grain structure (ASTM 5 or coarser). We produce in our 60,000 m² plant with more than 100 pieces of precision equipment, and we can guarantee tight tolerances and high-quality surface finishes. Our monthly manufacturing capacity is 100-200 tonnes, sizes: OD 6-219 mm, wall thickness 0.5-15 mm, with complete material traceability and supported by ISO 9001, AS9100D certifications.

What are the Incoloy 800H Seamless Tube?

These are solution-heat treated, nickel-iron-chromium austenitic alloys, for structural usage at high temperatures. 800H has better metallurgical qualities than regular Alloy 800 because of regulated chemistry and specific annealing.

The manufacturing is seamless and there is no need for weld seams at all. This implies that the tube walls are uniform and free from heat-affected zones that might degrade performance. Your systems are less prone to longitudinal weld degradation or localised corrosion.

This alloy holds together when you have intense heat cycling and high-pressure differentials. The material resists creep deformation and stress-rupture failure in harsh industrial environments.

Specification

Physical and Chemical Properties

Chemical Composition (%)

Physical Properties

Product Standards

We manufacture according to internationally recognized standards:

• ASTM B163 – Standard specification for seamless nickel-chromium-iron alloy tubes
• ASTM B829 – Specification for Incoloy alloy tubes
• ASME SB163 – Boiler and pressure vessel code
• JIS & DIN – Japanese and German industrial standards

All products come with full material test reports (MTR), third-party inspection certificates (SGS, BV, TUV), and complete traceability documentation.

What are the Features of Incoloy 800H Seamless Tube?

You use these technological benefits in your operations:

• Excellent Creep Resistance: The coarse grain structure provides excellent long term strength at high temperature. You can count on it to be stable in performance with extended exposure over 600°C.
• Excellent Oxidation Resistance: High chromium (19-23%) resists scale development and surface deterioration in oxidising atmospheres.
• Carburization Resistance: The alloy will withstand carbon-rich situations that would destroy normal stainless steels.
• Chloride stress corrosion cracking resistance: Excellent protection in chloride-containing situations is provided by the nickel content (30-35%).
• Seamless Construction: Uniform wall thickness, greater pressure ratings and no threat of weld-line corrosion in the absence of longitudinal welds.
• Thermal cycling stability: The material may be heated and cooled several times without cracking or losing its mechanical qualities.

Application

Your industry-specific challenges find solutions with Incoloy 800H Seamless Tube:

• Petrochemical Processing: Steam methane reformer pigtails, header parts, cracking furnace tubes needing resistance against carburization. The design removes the internal turbulence of fluid.
• Power Generation: Superheater and reheater tubes for coal and nuclear power facilities. The alloy retains its rupture strength when subjected to long heat stress and high-pressure steam.
• Thermal Processing: Furnace muffle, retorts and heat exchanger tubes for heat treatment plants. Stable performance in changeable redox atmospheres.
• Chemical Processing: Aggressive chemical reaction containers and piping systems at high temperature.

Company Factory 

We have a contemporary 60,000㎡ industrial facility that incorporates the whole production cycle. Here are distinct zones for melting, forging, rolling, machining, heat treatment and inspection.

We have invested in world class equipment including precision pilgering mills, brilliant annealing furnaces and state of the art NDT systems. This infrastructure allows us to maintain strict dimensional tolerances and better surface quality.

Our AS9100D accreditation demonstrates that we can fulfil the requirements of the aerospace sector, the highest level for accuracy and dependability.

What is the Production Process of Incoloy 800H Seamless Tube?

We have very tight control over our production processes to guarantee constant quality:

1. Raw Material Selection We use high-purity nickel-iron-chromium alloys from competent vendors to maintain chemical uniformity from the beginning.

2. Hot Extrusion: The billets are heated and driven through precise dies to make seamless hollow tubes, without welding needed.

3. Cold Pilgering/Drawing: The tubes are cold worked in a sequence of operations to produce accurate dimensions and better mechanical qualities.

4. Solution Annealing: A heat treatment at regulated temperatures develops the appropriate coarse grain structure (ASTM 5 or coarser) necessary for creep resistance.

5. Surface Finishing: Bright annealing, pickling or polishing as per your application needs.

6. trimmed and Inspection: The tubes are trimmed to the required length and carefully inspected for quality before they are packed.

Quality Inspection

Every tube is put through a battery of tests:

Grain Size Verification: Metallographic examination verifies ASTM No. 5 or coarser grain structure

Non-Destructive Testing: 100% Ultrasonic Testing (UT) or Eddy Current Testing (ET) for sub-surface defects

Hydrostatic Testing: Pressure integrity test in excess of service requirements.

Chemical Analysis: Spectrometry validates Carbon, Aluminium and Titanium content within strict tolerances

Mechanical Testing: Verified performance lifespan by high temperature tension and creep-rupture testing

You are given full paperwork including Quality Assurance Certificates (QAC), Inspection Test Plans (ITP) and Material Test Reports (MTR).

Why Select TSM Technology?

Proven Experience: More than 14 years experience exporting to over 70 countries. We understand your technical needs.

Advanced Manufacturing Our 60,000 ㎡ facility is equipped with more than 100 precision machinery with a monthly production capacity of 100-200 tonnes.

Quality Certifications: Our ISO 9001, AS9100D and AS9120 certifications reflect our dedication to aerospace-grade quality standards.

Technical Support: Our technical staff offers guidance on materials, installation and performance optimisation.

Customisable: We can provide you with bespoke sizes, finishes and processing needs to meet your precise demands.

Fast Delivery: We have stock and have efficient production schedule, so we can deliver in 20-45 days.

Package and Shipping

Each tube is carefully protected for international transport:

• Individual plastic caps on tube ends
• Bundle wrapping with waterproof material
• Wooden cases or steel frames for container loading
• Clear labeling with heat numbers and specifications

We ship from our logistics centre in Hong Kong and guarantee international on-time delivery with complete cargo insurance and monitoring.

FAQ

Q: Incoloy 800 vs 800H and 800HT. What are the differences?

A: The basic chemistry is the same, but 800H contains more carbon (0.05-0.10%) and a coarse grain size to improve creep characteristics. For even greater thermal strength, 800HT reduces the Al + Ti concentration even further.

Q: Can you weld these tubes?

A: Yes, they are easily welded by GTAW or GMAW processes. To preserve corrosion resistance and strength we propose Inconel Filler Metal 82 or Welding Electrode 182.

Q: At what temperature is 800H superior than normal stainless steels?

A: This alloy is selected for use above 600°C (1100°F) when the creep-rupture strength of the normal 300-series stainless steels is lost.

Q: Why choose seamless over welded tubing?

A. Seamless tubes can withstand greater pressures and avoid the possibility of preferred corrosion at weld seams, which is important for the transfer of hazardous chemicals at high temperatures.

Q: What documents do you provide?

A: Material Test Reports (MTR), Quality Assurance certifications (QAC), Inspection Test Plans (ITP) and third party inspection certifications (SGS, BV, TUV) are sent with each order on request.

Q. Do you give technical help on the choice of materials?

A: Definitely. Our engineering staff can evaluate your service circumstances and offer the best tube parameters for your application.

Contact Us

Ready to discuss your Incoloy 800H Seamless Tube high-temperature tubing requirements? Reach out to our technical team at info@tsmnialloy.com for immediate assistance with specifications and quotations.