ASTM B407 UNS N08811 Pipe
Alloy: UNS N08811 (Incoloy 800H)
Type: Seamless
Size Range: 1/8" to 12" NB
Wall Thickness: Schedule 5S to XXS
Length: Single Random: 5-7m, Double Random: 10-14m
Certification: ISO 9001, SGS test report, material certificate (MTC)
Our ASTM B407 UNS N08811 seamless pipe is manufactured from premium UNS N08811 alloy. This variant of the classic Alloy 800 is "high-temperature controlled" with tighter constraints on carbon, aluminum, and titanium content, and is required to be supplied in a solution-annealed condition to achieve a specific grain size. This precise engineering is what delivers its unmatched performance in prolonged high-temperature service.
ASTM B407 covers UNS N08120, UNS N08800, UNS N08801, UNS N08810, UNS N08811, UNS N08890, and UNS N06811 in the form of cold-worked and hot-finished annealed seamless pipe and tube.
Key Features
Excellent High-Temperature Strength
Enhanced creep rupture properties up to 815°C
Outstanding Oxidation Resistance
Resists scaling in air up to 1150°C
Good Carburization Resistance
Suitable for carburizing atmospheres
Excellent Sulfidation Resistance
Performs well in sulfur-containing environments
Good Fabricability
Can be welded and formed using standard methods
Controlled Carbon Content
Optimized for high-temperature service
Technical Specifications
|
Parameter |
Specification |
|
Standard |
ASTM B407 / ASME SB407 |
|
Alloy |
UNS N08811 (Incoloy 800H) |
|
Type |
Seamless |
|
Size Range |
1/8" to 12" NB |
|
Wall Thickness |
Schedule 5S to XXS |
|
Length |
Single Random: 5-7m, Double Random: 10-14m |
Chemical Composition (%)
|
Element |
Requirements |
Typical Value |
|
Nickel (Ni) |
30.0-35.0 |
32.5 |
|
Chromium (Cr) |
19.0-23.0 |
21.0 |
|
Iron (Fe) |
39.5 min |
45.5 |
|
Carbon (C) |
0.05-0.10 |
0.07 |
|
Aluminum (Al) |
0.15-0.60 |
0.35 |
|
Titanium (Ti) |
0.15-0.60 |
0.35 |
|
Manganese (Mn) |
≤ 1.50 |
0.80 |
|
Silicon (Si) |
≤ 1.00 |
0.50 |
|
Copper (Cu) |
≤ 0.75 |
0.35 |
|
Sulfur (S) |
≤ 0.015 |
0.008 |
Mechanical Properties
|
Property |
Requirements |
Typical Value |
|
Tensile Strength |
≥ 450 MPa |
550 MPa |
|
Yield Strength (0.2% Offset) |
≥ 170 MPa |
250 MPa |
|
Elongation (in 2 inches) |
≥ 30% |
40% |
|
Hardness (HB) |
≤ 192 |
160 |
High-Temperature Properties
|
Temperature |
Tensile Strength |
Yield Strength |
Creep Rupture Strength (1000h) |
|
540°C |
400 MPa |
180 MPa |
180 MPa |
|
650°C |
350 MPa |
160 MPa |
110 MPa |
|
815°C |
200 MPa |
130 MPa |
45 MPa |
Physical Properties
|
Property |
Value |
|
Density |
7.94 g/cm³ |
|
Melting Point |
1350-1400°C |
|
Electrical Resistivity |
98 μΩ·cm |
|
Thermal Conductivity |
11.2 W/m·K |
|
Coefficient of Thermal Expansion |
14.4 × 10⁻⁶/°C |
Why Choose Us? Your High-Temperature Specialist
When failure means costly downtime and safety hazards, you need a supplier with proven expertise.
Uncompromising Quality Assurance
Our ASTM B407 UNS N08811 seamless pipe undergo rigorous testing, including PMI (Positive Material Identification), ultrasonic testing, hydrostatic testing, and dimensional verification. Full traceability with Mill Test Certificates (MTC / EN 10204 3.1) is standard.
Technical Expertise & Support
Our team doesn't just take orders; we provide consultative support to ensure Incoloy 800H is the right material for your specific temperature and atmosphere challenges.
Reliable Global Supply Chain
We maintain strategic relationships with leading mills and hold inventory to meet urgent demands, ensuring your project timelines are met without compromise.
Frequently Asked Questions (FAQ)
Q: What is the difference between UNS N08800 (Alloy 800) and UNS N08811 (Alloy 800H)?
A: UNS N08811 (800H) has a higher controlled carbon content (0.05-0.10% vs. 0.10% max for 800) and is required to be solution annealed to achieve a coarse grain size. This structure provides superior creep rupture strength at temperatures above 1000°F (540°C).
Q: Why is seamless pipe critical for my reformer application?
A: Seamless pipe has no longitudinal weld seam, which is a potential weak point under the extreme combination of high internal pressure, high temperature, and cyclic stress found in reformer furnace applications. It ensures homogeneous strength and maximum reliability.
Q: What is your Minimum Order Quantity (MOQ)?
A: We offer flexible MOQs to support both large capital projects and smaller maintenance, repair, and operations (MRO) needs. Contact us with your requirements.
Q: Can you provide material test reports?
A: Yes. Every shipment is accompanied by a complete Mill Test Certificate that includes chemical analysis, mechanical properties, and heat treatment records, ensuring full compliance with ASTM B407.
Contact Us Now for a ASTM B407 UNS N08811 seamless pipe Quick Quote
WhatsApp: 8613468954786
Email:baohui@bhsteelpipe.com
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