ASTM B407 UNS N08811 Bright Surface Alloy Tube
Gnee Steel
ASTM B407 UNS N08811 Bright Surface Alloy Tube
ASTM B407 UNS N08811 Bright Surface Alloy Tube is an Incoloy 800HT nickel-iron-chromium high-temperature alloy product, renowned for its exceptional high-temperature strength, excellent creep and fracture resistance, and outstanding oxidation and carburization resistance. "Bright surface" refers to a specific surface treatment process, typically achieved through bright annealing (BA), which yields a smooth, clean, and highly reflective surface without the need for additional pickling.
Gnee Steel
What is the specification of incoloy 800?
INCOLOY alloy 800HT has a restricted chemistry, within the limits of alloy 800H, and requires a heat treatment of 2100°F (1149°C) minimum. The carbon is 0.06 to 0.10% (alloy 800H is 0.05 to 0.10%), the Al + Ti is 0.85 to 1.20% (alloy 800H is 0.30 to 1.20% Al + Ti).
UNS N08811 Alloy Steel Seamless Pipe Chemical Composition
| Element | Content (%) |
| Iron, Fe | ≥39.5 |
| Nickel, Ni | 30-35 |
| Chromium, Cr | 19-23 |
| Manganese, Mn | ≤1.5 |
| Others | Remainder |
UNS N08811 Alloy Steel Seamless Pipe Physical Properties
| Properties | Metric | Imperial |
| Density | 7.94 gm/cm3 | 0.287 lb/in3 |
UNS N08811 Alloy Steel Seamless Pipe Mechanical Properties
| Properties | Metric | Imperial |
| Tensile strength(annealed) | 600 MPa | 87 ksi |
| Yield strength(annealed) | 275 MPa | 39.9 ksi |
| Elongation at Break | 45% | 45% |
Incoloy 800HT shares many of the superior properties of Incoloy 800H, including:
• Excellent resistance to oxidation, sulfidation, and carburization
• Enhanced creep and fracture resistance at temperatures above 1100°F (600°C)
• Resistance to high-temperature corrosion and long-term exposure
• Ease of processing using standard methods
• Resistance to aqueous solutions at moderate temperatures
Users of Incoloy 800HT and nickel alloy 800HT use them in a variety of high-temperature applications, including:
• Hydrocarbon cracking
• Industrial furnace and boiler components and equipment
• Heat treatment equipment
• Pressure vessels and heat exchangers
• Chemical and petrochemical processing
Why Choose Gnee Nickel Alloy (Supplier Example)?
✅ Large stock of Incoloy 800/800H/800HT alloy tubes/bars/plates/fittings, fast shipping.
✅ Factory direct sales, highly competitive prices, excellent value for money.
✅ Comprehensive quality assurance: Material Testing Certificate (MTC), chemical composition certificate, and mechanical properties certificate.
✅ Value-added services: slitting, cutting, polishing, surface treatment.
✅ Worldwide shipping, secure and reliable packaging, and provision of export-required documents.
Email: ss@gneesteel.com
Gnee Steel is a supplier of Incoloy 800/800H/800HT steel, offering a wide range of products including: seamless pipe (sizes: 4-219 mm; thickness: 0.5-20 mm); welded pipe (sizes: 5.0-1219.2 mm; thickness: 0.5-20 mm); plates (thickness 0.1 to 100 mm; width 10-2500 mm); strips; alloy round bars (diameter 3-800 mm); flat bars (thickness 2-100 mm; width 10-500 mm); hexagonal bars (size 2-100 mm); wire rods; and extruded profiles. We collaborate with steel mills to provide our customers with 800 series alloys, meeting or exceeding numerous leading industry standards, including ASTM, ASME, SAE, AMS, ISO, DIN, EN, and BS standards.
Gnee Steel stocks and sells Incoloy 800/800H/800HT steel, including pipes, plates, strips, round bars, flat bars, forged billets, hexagonal steel, wire rods, and extruded profiles. Please feel free to contact us at ss@gneesteel.com for a quote.
