ASTM B407 N08811(800H) Nickel Alloy Tubes: High-Performance Solution for Corrosion & Heat Resistance

Product Overview

ASTM B407 N08811 nickel alloy tubes are premium-grade seamless pipes designed for extreme environments requiring exceptional resistance to oxidation, carburization, and thermal stress. As a nickel-iron-chromium alloy, N08811 delivers superior performance in high-temperature applications up to 1,100°C (2,012°F), making it ideal for industrial furnaces, petrochemical processing, and energy systems.

Chemical Composition of N08811 Nickel Alloy Tubes
The optimized composition ensures stability under aggressive conditions:

• Nickel (Ni): 44-46%
• Chromium (Cr): 19-23%
• Iron (Fe): Balance
• Copper (Cu): ≤0.50%
• Aluminum (Al): ≤0.30%
• Titanium (Ti): ≤0.30%
• Carbon (C): ≤0.10%
• Manganese (Mn): ≤1.50%
• Sulfur (S): ≤0.015%
• Silicon (Si): ≤1.00%

Equivalent Grades to ASTM B407 N08811
Globally recognized cross-standards ensure material interchangeability:

• UNS: N08811
• EN (Europe): 2.4858
• DIN (Germany): W.Nr. 1.4958
• Other Names: Alloy 800H (similar but distinct; N08811 includes controlled Ti/Al ratios).

Mechanical Properties of N08811 Alloy Tubes
Guaranteed performance metrics per ASTM B407:

• Tensile Strength: ≥550 MPa (80,000 psi)
• Yield Strength (0.2% Offset): ≥240 MPa (35,000 psi)
• Elongation: ≥30% (in 50mm)
• Hardness: ≤90 HRB
• Operating Temperature Range: -200°C to +1,100°C (-328°F to +2,012°F)

Tubes are supplied in an annealed condition for optimal ductility and weldability.

Key Applications of N08811 Nickel Alloy Tubes
Widely trusted in critical industries for its reliability:

1. Petrochemical: Ethylene cracking furnace tubes, reformer manifolds.
2. Heat Treatment: Radiant tubes, retorts, muffles for carburizing/sintering.
3. Power Generation: Superheater tubes, boiler components in coal/nuclear plants.
4. Chemical Processing: Reactor tubing, heat exchangers handling corrosive media.
5. Aerospace: Combustion chamber liners, exhaust systems.

Why Choose Our ASTM B407 N08811 Tubes?

• Precision manufacturing to ASTM/ASME SB-407 specifications.
• Full traceability with Mill Test Certificates (EN 10204 3.1).
• Custom sizes: OD 6mm to 250mm, thickness 1mm to 20mm.
• Surface finishes: Pickled, polished, or sandblasted per request.