ASME SB407 UNS N08811 Nickel-iron-chromium alloy high-temperature industrial piping
Gnee Steel
ASME SB407 UNS N08811 Nickel-iron-chromium alloy high-temperature industrial piping
ASME SB407 UNS N08811 tubing is a high-performance nickel-iron-chromium alloy renowned for its excellent high-temperature and corrosion resistance. Its key characteristics include maintaining high strength at high temperatures (up to approximately 1093°C), excellent resistance to oxidation, carburization, and stress corrosion cracking, and compliance with stringent quality standards. This tubing is widely used in demanding industrial applications such as petrochemical processing, heat exchangers, and steam generators.
Gnee Steel
What is SB 407 material?
What is ASTM B407 pipe? ASTM B407 alloy is composed of nickel, iron, and chromium. This specification is generally applied to seamless pipe and covers Incoloy 800 and Incoloy H/HT alloys.
Chemical Requirements for UNS N08811 Pipe
|
Element |
Nickel |
Chromium |
Iron |
Manganese, max |
Carbon |
Copper |
Silicon |
Sulfur, max |
Aluminum |
Titanium |
|
Composition Limits, % |
30 min – 35 max |
19 min – 23 max |
36.5 min |
1.5 |
– |
0.75 |
1 |
0.015 |
0.15 min – 0.60max |
0.15 min – 0.60max |
Mechanical Properties of UNS N08811 Tube
|
Alloy |
Condition (Temper) |
Tensile Strength |
Yield Strength (0.2 % offset, min) |
Elongation in 2 in. or 50 mm (0.8 in.), min |
|
UNS N08811 |
hot - finished annealed or cold - worked annealed |
65,000 (450) psi (MPa) |
25,000 (170) psi (MPa) |
30 |
Pipe Schedules
|
Normal Pipe Size |
Outside Diameter |
Schedule No. 5 |
Schedule No. 10 |
Schedule No. 40 |
Schedule No. 80 |
|
Inches |
|||||
|
1/4 |
0.54 |
-- |
0.065 |
0.088 |
-- |
|
3/8 |
0.675 |
-- |
0.065 |
0.091 |
0.126 |
|
1/2 |
0.84 |
0.065 |
0.083 |
0.109 |
0.147 |
|
3/4 |
1.05 |
0.065 |
0.083 |
0.113 |
0.154 |
|
1 |
1.315 |
0.065 |
0.109 |
0.133 |
0.179 |
|
1 1/4 |
1.66 |
0.065 |
0.109 |
0.14 |
0.191 |
|
1 1/2 |
1.9 |
0.065 |
0.109 |
0.145 |
0.2 |
|
2 |
2.375 |
0.065 |
0.109 |
0.154 |
0.218 |
|
2 1/2 |
2.875 |
0.083 |
0.12 |
0.203 |
0.276 |
|
3 |
3.5 |
0.083 |
0.12 |
0.216 |
0.3 |
|
3 1/2 |
4 |
0.083 |
0.12 |
0.226 |
0.318 |
|
4 |
4.5 |
0.083 |
0.12 |
0.237 |
0.337 |
|
5 |
5.563 |
-- |
-- |
0.258 |
-- |
|
6 |
6.625 |
-- |
-- |
0.28 |
-- |
|
Millimetres |
|||||
|
6.35 |
13.72 |
-- |
1.65 |
2.24 |
-- |
|
9.52 |
17.14 |
-- |
1.65 |
2.31 |
3.2 |
|
12.7 |
21.34 |
1.65 |
2.11 |
2.77 |
3.73 |
|
19.05 |
26.67 |
1.65 |
2.11 |
2.87 |
3.91 |
|
25.4 |
33.4 |
1.65 |
2.77 |
3.38 |
4.55 |
|
31.8 |
42.16 |
1.65 |
2.77 |
3.56 |
4.85 |
|
38.1 |
48.26 |
1.65 |
2.77 |
3.68 |
5.08 |
|
50.8 |
60.32 |
1.65 |
2.77 |
3.91 |
5.54 |
|
63.5 |
73.02 |
2.11 |
3.05 |
5.16 |
7.04 |
|
76.2 |
88.9 |
2.11 |
3.05 |
5.49 |
7.62 |
|
88.9 |
101.6 |
2.11 |
3.05 |
5.74 |
8.08 |
|
101.6 |
114.3 |
2.11 |
3.05 |
6.02 |
8.56 |
|
127.0 |
141.3 |
-- |
-- |
6.55 |
-- |
|
152.4 |
168.28 |
-- |
-- |
7.11 |
-- |
Advantages of ASME SB407 UNS N08811
1. Excellent High-Temperature Resistance
Maintains stable mechanical properties at high temperatures (e.g., 650–1093°C), resisting deformation/cracking under pressure and ensuring pipeline stability.
2. Strong Corrosion Resistance
Resistant to oxidizing acids (such as nitric acid), sulfur-containing media, and stress corrosion.
Reduces leakage risk, suitable for high-temperature corrosive environments such as chemical and petrochemical industries.
3. Superior Structure and Quality Assurance
Seamless Construction: Uniform wall thickness, no weak welds, ideal for high-pressure/high-purity fluid transportation.
Compliant with ASME SB407 Standard: Rigorous testing (chemical, mechanical, and non-destructive testing) ensures reliable quality.
4. Good Machinability
Easy to Form: Can be cold-worked/hot-worked into various shapes (straight/bends) to meet different design requirements. Weld-Friendly: Weld properties match the base material properties, reducing installation/maintenance costs.
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 professional manufacturer of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. We specialize in the production and sales of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions according to customer needs. For alloy material price inquiries or to request customized alloy material solutions, please feel free to contact us at ss@gneesteel.com for a quote.
