 |
Incoloy steel pipes are available in seamless, welded, ERW, EFW, and fabricated forms, suitable for both pressure piping systems and heat transfer applications. These pipes are widely used in petrochemical processing, heat exchangers, power generation, offshore engineering, chemical plants, and furnace applications.
Type | Seamless/Welded/SAW/ERW/EFW Pipe | |
End | BE (Beveled End) | |
Size | OD: 1/2"-48" | |
Manufacturing Technique | Hot rolling / Hot work / Cold rolling / Cold-drawn | |
Producing Standard | ASME B36.10 and ASME B36.19 | |
Hastelloy Steel Grades | ASTM B474 | UNS NO8825/ Incoloy 825 |
ASTM B407 | UNS N08800 / Incoloy 800, UNS NO8810 / Incoloy 800H, UNS N08811 / Incoloy 800HT | |
ASTM B423 | UNS N08825 / Incoloy 825 | |
The following table summarizes the most common incoloy grades.
Grade (UNS) | Common Name | Nominal Composition | Key Properties | Typical Pipe Applications |
N08800 | Incoloy 800 | 32% Ni, 46% Fe, 21% Cr | High-temperature strength, oxidation resistance | Steam methane reformer tubes, furnace components |
N08810 | Incoloy 800H | 32% Ni, 46% Fe, 21% Cr (controlled C, Al) | Enhanced creep strength at 1100-1500°F | High-temperature piping, heat exchangers, furnace tubes |
N08811 | Incoloy 800HT | 32% Ni, 46% Fe, 21% Cr (tight C, Al, Ti) | Optimized for max creep strength | Petrochemical furnace tubes, reformer outlet piping |
N08825 | Incoloy 825 | 42% Ni, 22% Fe, 21.5% Cr, 3% Mo, 2% Cu | Excellent acid resistance, chloride SCC resistance | Chemical process piping, offshore seawater, downhole tubing |
Incoloy pipes are manufactured to strict ASTM (American Society for Testing and Materials) specifications, which define chemical composition, mechanical properties, dimensional tolerances, and testing requirements. ASME (American Society of Mechanical Engineers) adopts these standards for use in pressure-containing applications under the ASME Boiler and Pressure Vessel Code.
ASTM/ASME Standards for Incoloy Pipe and Tube
ASTM Standard | ASME Equivalent | Product Form | Applicable Grades | Key Requirements |
ASTM B163/B163M | SB163 | Seamless tube, condenser & heat exchanger | N08800, N08810, N08811, N08825 | Chemical analysis, mechanical, hydrostatic, dimensional |
ASTM B423/B423M | SB423 | Seamless pipe and tube | N08825 | Chemical, tensile, hardness, hydrostatic, NDT |
ASTM B515/B515M | SB515 | Welded pipe (ERW) | N08825 | Chemical, tensile, weld integrity, hydrostatic |
ASTM B705/B705M | SB705 | Welded pipe (longitudinal seam) | N08825 | Chemical, tensile, radiography/ultrasonic, hydrostatic |
ASTM B751/B751M | SB751 | Welded tube, general | N08800, N08825 | Chemical, tensile, dimensional, hydrostatic |
ASTM B829/B829M | SB829 | Seamless pipe and tube, general | N08800, N08810, N08811, N08825 | Chemical, mechanical, hydrostatic/NDT |
International Standard Equivalents for Incoloy Grades
Grade | ASTM (USA) | DIN/W-Nr (Germany) | EN (Europe) | JIS (Japan) | GB (China) |
Incoloy 800 | N08800 | 1.4876 / X10NiCrAlTi3210 | EN 10095 X8NiCrAlTi32-21 | NCF 800 | NS1101 |
Incoloy 800H | N08810 | 1.4959 / X5NiCrAlTi31-6-11 | EN 10095 X5NiCrAlTi31-6 | NCF 800H | NS1102 |
Incoloy 800HT | N08811 | 1.4959 / X5NiCrAlTi31-6-11 | EN 10095 (same as 800H) | NCF 800HT | NS1103 |
Incoloy 825 | N08825 | 2.4858 / NiCr21Mo | EN 10088 NiCr21MoCuNb | NCF 825 | NS142 |
Incoloy 904L | N08904 | 1.4539 / X1NiCrMoCu25-20-5 | EN 10088 X1NiCrMoCuN25-20-5 | NAS 904L | NS143 |
Incoloy seamless pipes are manufactured through one of two primary processes:
· Piercing and Rolling (Mannesmann Process): A heated solid billet is pierced by a piercing mill to create a hollow shell, which is then rolled and sized to final dimensions. This is the most common method for Incoloy pipe.
· Extrusion: A hollow billet is heated and extruded through a die to form the pipe. Used for smaller sizes and specialty alloys.
· Heat Treatment: After forming, pipes are solution annealed (typically at 1700-1800°F / 925-980°C for Incoloy 825) to restore corrosion resistance and achieve uniform mechanical properties.
· Testing and Inspection: Hydrostatic testing at 1.5x design pressure (minimum), ultrasonic or eddy current testing, and dimensional inspection per ASTM requirements.
Quality Documentation for Incoloy Pipe
Document Type | Standard | Content | When Required |
Mill Test Report (MTR) | EN 10204 3.1 | Chemical analysis, mechanical properties, heat treatment, test results | All orders (standard) |
EN 10204 3.2 Certificate | EN 10204 3.2 | MTR + third-party witness verification | Critical service, PED compliance |
Radiography Report | ASME Section V | Film or digital radiographs of weld seams (welded pipe) | Welded pipe for pressure service |
Ultrasonic Test Report | ASTM E213/E426 | UT examination for laminations, inclusions | Heavy-wall pipe, critical service |
Hardness Survey | ASTM E10/E18 | Brinell or Rockwell hardness testing | NACE MR0175/ISO 15156 compliance |
Intergranular Corrosion Test | ASTM G28 | Huey or Streicher test for sensitization | Critical corrosion applications |
Industry | Typical Applications | Preferred Grade(s) | Key Requirements |
Oil & Gas Upstream | Downhole tubing, wellhead piping, seawater injection lines | Incoloy 825 | NACE MR0175, chloride SCC resistance, sour service |
Oil & Gas Downstream | Refinery process piping, overhead lines, amine units | Incoloy 825, 800H | Sour service, high-temperature, polythionic acid SCC |
Petrochemical | Ethylene furnace tubes, reformer outlet piping, transfer lines | Incoloy 800H/800HT | Creep strength, oxidation resistance, carburization resistance |
Chemical Processing | Sulfuric acid piping, phosphoric acid, organic acids | Incoloy 825, 904L | Acid resistance, general corrosion resistance |
Power Generation | Heat recovery steam generator (HRSG) tubes, superheater tubes | Incoloy 800H | High-temperature strength, oxidation resistance |
Offshore / Marine | Seawater cooling, firewater, injection water, risers | Incoloy 825, 25-6MO | Seawater corrosion, chloride SCC, biofouling resistance |
Fertilizer Production | Ammonia plant piping, urea plant, phosphoric acid | Incoloy 825, 904L | Acid resistance, erosion-corrosion resistance |
Pharmaceutical | Process piping for aggressive intermediates | Incoloy 825 | Cleanability, corrosion resistance, cGMP compliance |
[Application Example] Application: North Sea Oil Platform Seawater Injection Challenge: An offshore platform in the North Sea required seawater injection piping to maintain reservoir pressure. Seawater at 15°C with 35,000 ppm chloride content, plus injected biocide and oxygen scavenger chemicals. Original design used 316L stainless steel, but experienced chloride stress corrosion cracking (SCC) failures within 18 months of service. |
Jinie Technology Co., Ltd. is a leading supplier of Incoloy pipes and tubes, offering both seamless and welded constructions in all major Incoloy grades. We maintain strategic partnerships with certified Chinese and international mills to provide competitive pricing, reliable quality, and flexible delivery options.
Product | Grades Available | Size Range | Stock Availability |
Incoloy 825 Seamless Pipe | UNS N08825 | 1/2" - 12" | Selected sizes in stock |
Incoloy 825 Welded Pipe | UNS N08825 | 1/2" - 24" | Selected sizes in stock |
Incoloy 800H/800HT Seamless | UNS N08810/N08811 | 1" - 8" | Made-to-order |
Incoloy 904L Seamless Pipe | UNS N08904 | 1/2" - 8" | Limited stock |
