Search
한국어
русский
عربى
Utilizing 26 high-precision cold rolling mills and 6 cold drawing machines, we ensure dimensional accuracy and superior mechanical properties.
High Creep Strength Monel 800 Tubing
Fe-Ni-Cr Alloy | UNS N08800 / N08810 / N08811 | Creep Rupture Strength
ASTM B407 | ASME SB407 | Ethylene & Reformer GradeRelated Products
Introduction
High Creep Strength Monel 800 Tubing uses a common market name for the Alloy 800 family. The material is an iron-nickel-chromium alloy, UNS N08800, also known as Incoloy 800, and not a nickel-copper Monel. It contains 30-35% nickel, 19-23% chromium and more than 39.5% iron. The nickel is enough to prevent chloride stress corrosion cracking and to keep the structure stable, while chromium provides oxidation and carburization resistance at furnace temperatures where stainless 304 and 310 lose strength or turn brittle.
The family has three versions. Alloy 800 has carbon up to 0.10% and is used mainly for corrosion resistance up to about 600°C. Alloy 800H holds carbon at 0.05-0.10% and requires a coarse grain size, which is why it has better creep rupture strength above 600°C. Alloy 800HT adds a minimum 0.85% of aluminum plus titanium for further creep performance. Seamless tube in the annealed condition (ASTM B407) has a minimum tensile strength of 520 MPa, yield strength of 205 MPa and elongation of 30%; for H grades a solution anneal at about 1150°C is applied to develop the grain size.
Typical uses are ethylene cracking furnace coils, steam methane reformer outlet pipes and headers, hydrogen production, heat exchanger tubes in petrochemical plants, nitric acid heat exchangers and sheathing for electric heaters. The alloy resists oxidation and carburization well, but long exposure between 650°C and 750°C can cause sigma-phase precipitation and loss of ductility in the H grades, so design temperatures and inspection intervals should reflect this. For temperatures above about 1000°C or heavier carburizing duty, higher-nickel alloys are normally preferred.
Specifications
| Material Grade | Alloy 800 / 800H / 800HT |
| Standard | ASTM B407, ASME SB407 |
| Outer Diameter | 19.05mm - 219mm |
| Wall Thickness | 1.65mm - 20mm |
| Length | Up to 12000mm |
| Finish | Solution Annealed, Pickled |
Chemical Composition
| Ni | Cr | Fe | C | Al+Ti |
| 30-35 | 19-23 | ≥39.5 | .05-.10 (H) | .85-1.20 (HT) |
Creep Rated Furnace Grade
Mechanical Strength
Comprehensive Info
| MOQ | 100kg |
| Lead Time | 35 - 50 Days |
| Testing | Grain Size & Hydro-test |
| Anneal (H Grades) | About 1150°C |
Key Applications
Ethylene Furnaces Cracking furnace coils
Steam Reformers Outlet pipes and headers
Nitric Acid Exchangers Heat exchanger tube
Advantages
Creep Rupture Strength
H and HT grades hold stress above 600°C.
Carburization Resistant
Chromium and nickel resist carbon pickup.
SCC Resistant
30-35% nickel prevents chloride cracking.
Controlled Grain Size
H grades supplied with coarse grain.
About Jiangsu Jend Tube Co.,Ltd.
As China High Creep Strength Monel 800 Tubing Manufacturers and Wholesale High Creep Strength Monel 800 Tubing Factory, Established in 2011 and is a manufacturing enterprise with a complete manufacturing cycle from raw material selection to finished product delivery. The company currently has more than 100 employees, covers an area of 30015 square meters, and has a registered capital of 48 million yuan, annual production capacity of 3800 tons.
The company has passed ISO9001:2015 quality certification, domestic pressure vessel TS certification, and foreign pressure vessel PED certification. With rich experience and mature technology, we have been expanding our market internationally. At present, our products are exported to more than 50 countries and regions including Europe, America, Southeast Asia, and the Middle East.
The company adheres to different production norms and standards such as the American standard (ASTM), the European standard (EN), the German standard (DIN), the Japanese standard (JIS), the Russian standard (GOST), and the Chinese standard (GB).
Our company specializes in and customizes various specifications of Martensite TP410 (0Cr13, 1Cr13), Ferrite TP405 (1Cr13Al), TP430 (1Cr17), TP444 (0Cr18Mo2), TP439, TP409 (0Cr11Ti), It is also proficient in manufacturing Austenitic seamless stainless steel pipes of series such as TP304(L/H), TP316(L/H/Ti), TP310S, TP317, TP321(H) and TP347(H). Duplex such as S31803, S2205, S32750, S32304, and Nickel-based alloys Monel400, Monel600, Monel800, GH3030, 904L, Inconel 625, etc.
The company mainly produces seamless steel pipes with the following specifications: outer diameter: 3.18mm to 406.4mm, wall thickness: 0.3mm to 20mm, and the longest length is 25000mm. Additionally, it can customize seamless steel pipes with special materials and specifications according to customer requirements. The company attaches great importance to scientific innovation. The staff of the company vigorously develop technological research and development.
Jiangsu Jend Tube Co.,Ltd. will continuously accumulate professional knowledge and capabilities, striving to become a leader in the domestic market and even the world market. Strive to be the most reassuring pipe manufacturing enterprise for customers.
Precision Manufacturing and Process Optimization
We rely on precision equipment and optimized production technologies to achieve outstanding mechanical performance and consistent product quality.
Cold Rolling and Cold Drawing
Solution Heat Treatment
Natural gas solution treatment furnaces and BA solution treatment furnaces optimize the material's grain structure, enhancing corrosion resistance.
Precision Straightening and Polishing
10 straightening machines and 8 finishing polishing machines guarantee product surface smoothness and dimensional accuracy.
Automated Inspection and Quality Assurance
Real-time monitoring systems ensure the stable quality of every batch of products.
Usage Tips
Choose the Right Version
Specify 800H or 800HT for service above 600°C; plain 800 is for corrosion rather than creep.
Watch 650-750°C
Long exposure can form sigma phase and reduce ductility.
Services
Grain Size Report
ASTM grain size verified for H grades.
Hydrostatic Testing
Pressure testing to code.
Bevel & End Prep
Weld-ready ends.
Logistics
30% T/T Deposit / L/C at sight. Pipe packed in sealed wooden cases with heat number tags and end caps.
Standards
ASTM B407
ASME SB407
ASME Section II Part D
ISO 9001
Frequently Asked Questions
Is Monel 800 the same as Incoloy 800?
The alloy is Alloy 800 (Incoloy 800), an iron-nickel-chromium alloy; 'Monel 800' is a loose market name.
What is the difference between 800, 800H and 800HT?
800H has controlled carbon and grain size for creep; 800HT adds Al+Ti of 0.85-1.20%.
What is the use temperature range?
800 up to about 600°C for corrosion; H grades above 600°C for creep.
Does it resist carburization?
Yes, better than stainless steels.
Can sigma phase form?
Yes, with long exposure around 650-750°C.
Is ASME Part D data available?
Yes, allowable stresses are published.
Ready to Order Alloy 800H Tubing?
Share design temperature and pressure for a version recommendation.
Request a Quote
