ASTM B407 UNS N08800 Seamless Annealed Pipe for Ethylene Cracking
Oct 23, 2025
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ASTM B407 UNS N08800 Seamless Annealed Pipe is designed specifically for ethylene cracking furnaces. Made from a nickel-iron-chromium alloy (45.0-48.0% nickel, 30.0-35.0% iron, and 19.0-23.0% chromium), it is enhanced with aluminum (0.15-0.60%) and titanium (0.15-0.60%) for carbide stability. The solution annealing process optimizes the grain structure, resulting in a tensile strength of 500-700 MPa and a yield strength of ≥210 MPa, while maintaining excellent thermal cycling ductility.
All pipes are supplied with a mill test certificate (EN 10204 3.1) and optional third-party corrosion and metallurgical analysis reports, ensuring compliance with ASME and petrochemical industry standards for critical high-temperature process piping.

Specification Chart of Incoloy 800H Pipe
| Standard Specification | ASTM B514 /ASME SB 514, ASTM B407/ ASME SB 407 |
| Manufacturing Type | Seamless / ERW / Welded / Fabricated / CDW / CDS / DOM / CEW / 100% X Ray Welded |
| Thickness Range | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXH, SCH XXS, SCH XS |
| Standard | SUS, JIS, AISI, ASTM, GB, DIN, EN |
| Value Added Services |
Cutting Beveling Threading Destructive and Non Destructive Ultrasonic Testing Draw & Expansion as per required Size & Length |
| END | Plain End, Beveled End, Treaded Alloy 800H Pipe |
Incoloy UNS N08800 Seamless Pipe Chemical Composition
| Grade | C | Mn | Si | Fe | S | Cr | Al-Ti | Ni | |
| Incoloy 800 Pipe | min. | – | – | – | 39.5 | – | 19.0 | 0.15 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 0.60 | 35.0 | |
| Incoloy 800H Pipe | min. | 0.05 | – | – | 39.5 | – | 19.0 | 0.15 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 0.60 | 35.0 | |
| Incoloy 800HT Pipe | min. | 0.06 | – | – | 39.5 | – | 19.0 | 0.85/0.25 | 30.0 |
| max. | 0.1 | 1.5 | 1.0 | – | 0.015 | 23.0 | 1.20/0.60 | 35.0 | |
ASME SB407 UNS N08800 Incoloy Pipe Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 800-H-HT | Psi – 75,000 , MPa – 520 | Psi – 30,000 , MPa –205 | 30 | – | |
Application of Incoloy 800H Welded Pipe
Ethylene furnace quench boilers
Hydrocarbon cracking
Valves, fittings and other components exposed to corrosive attack from 1100-1800° F
Industrial furnaces
Heat-treating equipment
Chemical and petrochemical processing
Super-heater and re-heaters in power plants
Pressure vessels
Heat exchangers
ASTM B407 Incoloy 800 Seamless Annealed Pipe Price List
| ASTM B407 Seamless Incoloy 800 Pipe, SCH40S 1/2, 21.3mm X 2.77mm LENGTH =1120 mm | INR 3,400/ Kg |
| Pickled Annealed Cold Drawn Incoloy 800 Pipe | INR 2,800/Kg |
Contact us for free samples and quotes or email sales@gneestainless.com
Incoloy 800 Pipe Inspection & Test reports
Mill Test Certificates with all Incoloy 800 Pipe
EN 10204/3.1B, EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
Chemical Reports
Mechanical Reports
PMI Test Reports
Visual Inspection Reports
Third Party Inspection for Incoloy 800 Alloy Pipe
NABL Approved Lab Reports
Destructive Test Report
Non Destructive Test Reports
100% Radiography Test Report
GNEE provide Incoloy 800 Seamless and Welded Pipes for the Oil and Gas, Petrochemical and Power Industries. Incoloy pipes supplier in China. ASTM B407 Incoloy 800 Seamless pipe, Incoloy 800 Seamless tube, 1.4876 Incoloy Seamless pipe, 1.4876 Seamless tube, Incoloy seamless pipe and tube supplier, exporter.
Types of Incoloy 800 Pipe

Packaging and Marking:
Packaged in bales or laminated wooden crates, wrapped in plastic, and appropriately protected to ensure seaworthiness for transport, or as required.
Marking must comply with Specification A1016/A1016M. Marking must include information on whether the pipe is hot-finished or cold-finished, including but not limited to: standard, grade, size, heat number, and batch number.

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