Introduction

INCONEL 800 (UNS N08800 / Alloy 800 / Incoloy 800 / NCF800) is a solid‑solution nickel‑chromium‑iron alloy with smaller additions of titanium and copper. Its unique chemical composition provides excellent anti‑oxidation and anti‑carburization properties at high temperatures, along with outstanding high‑temperature corrosion resistance and good processing performance. Incoloy 800 seamless tube and heat exchanger tube are widely used in petrochemical furnaces, steam superheaters, and nuclear steam generators. Alloy 800 plate, round bar, sheet, and welding wire are also available for radiant tubes, retorts, and furnace baffles. Like austenitic stainless steels, Incoloy 800/800H/800HT offers good resistance to acids, with excellent performance in both oxidizing and non‑oxidizing salts due to its higher chromium content. For higher creep rupture strength, Incoloy 800H (UNS N08810) and 800HT (UNS N08811) are recommended for reformer tubes and ethylene cracking service. Supplied per ASTM B407, B408, B409, or customer specifications.

Chemical components（%）

Mechanical properties

Physical properties

Incoloy 800 Available Products and Standard

1. GB/T 15007 (Nickel and Nickel Alloy Plate, Strip, and Foil)

Domestic Grade: NS1101 (GB/T 15007) / Incoloy 800 equivalent

Type: Sheet / Plate / Strip / Wire / Tube / Bar

Size Range:

Wire: 0.1 – 15.0 mm dia

Strip: 0.05 – 5.0 mm thick × 5 – 500 mm wide

Round Bar: 8 – 355 mm dia

Sheet / Plate: 0.5 – 180 mm thick

Seamless Tube / Pipe: Custom sizes available

Surface: Annealed, Bright, Pickled, Ground

Testing: Chemical analysis, mechanical test (tensile strength, yield strength, elongation), hardness test, intergranular corrosion test, high-temperature oxidation test, dimensional inspection

2. ASTM B407 (Standard Specification for Nickel-Iron-Chromium Alloy Seamless Pipe and Tube)

Grade: UNS N08800 / N08810 / N08811 / Incoloy 800 / 800H / 800HT

Type: Seamless Pipe / Seamless Tube / Heat Exchanger Tube

Size Range:

Seamless Pipe: 6 – 610 mm OD × 1 – 50 mm wall thickness

Seamless Tube: Custom sizes

Surface: Annealed, Pickled, Bright

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hydrostatic test, eddy current test, dimensional inspection

3. ASTM B408 (Standard Specification for Nickel-Iron-Chromium Alloy Rod and Bar)

Grade: UNS N08800 / N08810 / N08811 / Incoloy 800 / 800H / 800HT

Type: Round Bar / Rod / Wire

Size Range:

Round Bar: 8 – 355 mm dia (hot rolled or cold drawn)

Wire: 0.1 – 15.0 mm dia (coils or straight)

Surface: Annealed, Pickled, Ground, Turned, Bright

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, ultrasonic test, dimensional inspection

4. ASTM B409 (Standard Specification for Nickel-Iron-Chromium Alloy Plate, Sheet, and Strip)

Grade: UNS N08800 / N08810 / N08811 / Incoloy 800 / 800H / 800HT

Type: Sheet / Plate / Strip

Size Range:

Sheet / Plate: 0.5 – 180 mm thick (hot rolled or cold rolled)

Strip: 0.05 – 5.0 mm thick × up to 500 mm wide (coils)

Surface: Annealed, Pickled, Bright, Polished

Testing: Chemical analysis, mechanical test (tensile, yield, elongation), hardness test, intergranular corrosion test, high-temperature oxidation test, dimensional inspection

Advantage

(1) Excellent high‑temperature oxidation and carburization resistance – Incoloy 800 seamless tube and plate maintain stable performance up to 1100°C, resisting both oxidation and carbon penetration in petrochemical furnaces.

(2) Good high‑temperature corrosion resistance – Higher chromium content provides excellent resistance to both oxidizing and non‑oxidizing salts, similar to austenitic stainless steels. Alloy 800 heat exchanger tube performs reliably in aggressive environments.

(3)High creep rupture strength (800H/800HT) – Incoloy 800H reformer tube and 800HT pipe offer superior creep strength for ethylene cracking, hydrogen plants, and steam superheater service.

(4)Good processing performance – Incoloy 800 round bar, sheet, and welding wire are easily formed, machined, and welded, making them suitable for complex equipment fabrication.

(5)Versatile product forms – Incoloy 800 forging, flange, fitting, strip, and radiant tube are available for heat treatment fixtures, furnace parts, and nuclear steam generators.

Application

(1) Petrochemical furnaces – Incoloy 800 seamless pipe and heat exchanger tube are used in cracking tubes, pigtails, and transfer lines for ethylene production.

(2)Steam superheaters and reformers – Incoloy 800H reformer tube and 800HT pipe are standard materials for hydrogen plants, ammonia reformers, and methanol production.

(3)Heat treatment equipment – Incoloy 800 radiant tube, retort, and furnace baffle withstand high‑temperature oxidation and carburization in annealing and brazing furnaces.

(4)Nuclear power plants – Alloy 800 steam generator tube and plate are used in nuclear steam generators and reactor internals, where stability under high temperature and pressure is critical.

(5)Chemical processing – Incoloy 800 round bar and welding wire serve in nitric acid plants, caustic evaporators, and pickling equipment.

(6)Power generation – Incoloy 800 superheater tube and forged ring are applied in fossil fuel boilers and waste heat recovery systems.

MONO Group is one of Superalloy, Nickel alloy, high Temperature alloy manufacturer&Supplier&Wholesaler from China,We can supply high quality alloy plate,sheet,round bar,tube.pipes,fittings,flange,and custom parts in accordance with ASTM, ASME, DIN, ISO, GB, and other international standards. For inquiries or to request a quote , please freely contact us at info@monokj.com.