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Utilizing 26 high-precision cold rolling mills and 6 cold drawing machines, we ensure dimensional accuracy and superior mechanical properties.
TP310S High Temperature Furnace Tubing
25-20 Chromium-Nickel | UNS S31008 | Radiant Tube & Muffle Grade
Heavy Wall | Sag Resistant | ASME SA213/SA249Related Products
Introduction
TP310S High Temperature Furnace Tubing applies the same 25% chromium, 20% nickel austenitic chemistry used in boiler-grade 310S to a very different service profile: direct exposure inside industrial furnaces, kilns, and muffle chambers where the tube itself sits in the hot zone rather than carrying pressurized steam. In this role, the governing design considerations shift from internal pressure containment toward sag resistance under self-weight at temperature, resistance to thermal cycling as furnaces heat up and cool down between batches, and long-term scaling resistance in atmospheres that may include combustion products, nitrogen-hydrogen protective gas, or carburizing carbon-rich environments common in heat treatment operations.
Furnace tubing is typically supplied in larger outer diameters and heavier wall sections than boiler tube of the same alloy, since radiant tubes and roller-hearth support tubes must resist creep sag over multi-meter unsupported spans at temperatures that can reach 1100-1150°C in peak zones. The high chromium content forms a dense, adherent Cr2O3 scale that continues to protect the base metal through repeated thermal cycling, while the fully austenitic structure avoids the 475°C embrittlement that would otherwise limit ferritic alternatives in furnaces that cycle through that intermediate temperature range during startup and shutdown.
Common installations include radiant heating tubes in continuous annealing lines, muffle tubes for atmosphere-controlled heat treatment furnaces, kiln rollers and support beams in ceramics and refractory production, and thermocouple protection tubes for direct-fired process furnaces. Because carburizing atmospheres can embrittle austenitic tube over time, furnace operators running carbon-rich protective gas should monitor for surface carbide formation and consider periodic wall-thickness surveys, particularly on tubes that see the most severe temperature gradient during cycling.
Specifications
| Material Grade | TP310S (UNS S31008) |
| Standard | ASTM A213 / A249 |
| Outer Diameter | 50mm - 219mm |
| Wall Thickness | 3mm - 20mm |
| Length | Up to 12000mm |
| Finish | Pickled, Heavy Wall |
Chemical Composition
| C | Mn | Si | Cr | Ni |
| ≤.08 | ≤2.0 | ≤1.5 | 24-26 | 19-22 |
Sag Resistant Carburization Resistant
Mechanical Strength
Comprehensive Info
| MOQ | 1000kg |
| Lead Time | 30 - 45 Days |
| Testing | Wall Thickness Survey & PMI |
| Max Peak Wall Temp | 1150°C |
Key Applications
Radiant Tubes Continuous annealing line heating tubes
Muffle Furnaces Atmosphere-controlled heat treatment chambers
Kiln Rollers Ceramics and refractory production support beams
Advantages
Sag Resistant
Heavier wall sections resist creep sag over long spans.
Thermal Cycling Tolerant
Withstands repeated furnace heat-up and cool-down.
1150°C Peak Rated
Adherent oxide scale holds through peak zone excursions.
No 475°C Embrittlement
Fully austenitic structure avoids ferritic cycling limits.
About Jiangsu Jend Tube Co.,Ltd.
As China TP310S High Temperature Furnace Tubing Manufacturers and Wholesale TP310S High Temperature Furnace 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
Carburizing Atmosphere
In carbon-rich protective gas, schedule periodic wall-thickness surveys since surface carburization can embrittle the outer layer over time.
Span Support
Limit unsupported horizontal spans and add intermediate supports where sag at peak temperature could contact adjacent equipment.
Services
Heavy Wall Cutting
Precision cut-to-length for radiant tube sets.
End Machining
Flange and coupling preparation for furnace fittings.
Wall Survey
Baseline thickness mapping before installation.
Logistics
30% T/T Deposit / L/C at sight. Heavy wall lengths shipped in steel-framed crates with internal dunnage to prevent transit deformation.
Standards
ASME SA213/SA249
ISO 9001
TUV/PED on Request
Frequently Asked Questions
How is furnace tubing different from boiler tube in the same alloy?
Furnace tubing is typically thicker-walled and larger in diameter because it must resist creep sag under its own weight at temperature, rather than primarily contain internal steam pressure.
What is the maximum service temperature?
TP310S furnace tubing can tolerate continuous exposure up to about 1100°C, with brief peak excursions to 1150°C in radiant zones.
Does carburizing atmosphere affect this alloy?
Prolonged exposure to carbon-rich protective gas can carburize the surface and reduce ductility, so periodic inspection is recommended in carburizing service.
Can these tubes be used as kiln rollers?
Yes, heavier wall TP310S sections are commonly used as roller-hearth support tubes and beams in ceramics and refractory kilns.
Is this tube resistant to thermal cycling?
Yes, the fully austenitic structure avoids 475°C embrittlement and tolerates the repeated heat-up and cool-down cycles typical of batch furnaces.
What wall thickness do you recommend for a 3-meter unsupported span?
Span-specific wall thickness depends on operating temperature and load; share your furnace layout and we will recommend a section based on creep-sag calculations.
Need TP310S Furnace Tubing for Your Application?
Send your furnace temperature profile and span length for a sag-resistant wall thickness recommendation.
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