SS 310 & 310S Welded Tubes Manufacture
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Midland Alloys Inc. is a leading manufacturer and supplier of SS 310 & 310S welded tubes. We manufactured high-performance tubing designed for extreme heat and demanding service conditions. As a leading SS 310 welded tubes supplier, we supply reliable SS 310/310S welded tubing designed from high chromium and nickel austenitic grades. These alloys provide excellent oxidation resistance and structural stability at high temperatures. Our welded tubes perform reliably in furnaces, petrochemical plants, power plants and heat treatment systems and are subjected to continual heat. We manufacture tubes for structural, process, and thermal service lines under strict quality control, meeting global requirements while providing complete traceability and documentation. Global clients rely on our inspection systems, mechanical testing, and export-ready supply capability.
What is SS 310 & 310S Welded Tubing?
SS 310 (UNS S31000) and SS 310S (UNS S31008) are heat-resistant austenitic stainless steels designed for high-temperature applications. These tubes are formed by rolling a stainless steel strip into cylindrical shapes and longitudinal welding. Then these tubes are heat-treated and finished to attain dimensional correctness. 310S welded tube has less carbon than 310, which reduces carbide precipitation during welding and increases corrosion resistance, as it improves both weldability and long-term structural integrity. Chromium resists oxidation at high temperatures, whereas nickel enhances strength and phase stability during thermal stress. SS 310 welded tubes and SS 310S welded tubes meet ASTM A249 and A269 standards, ensuring consistent mechanical and chemical performance for heat exchanger and process applications.
Benefits of Stainless 310, 310S Welded Tubes
High-temperature environments require stable metallurgy and reliable weld integrity. These grades maintain strength even when exposed to continuous thermal cycles and oxidising atmospheres.
The benefits of SS 310 welded tubes and 310S welded tubing are:
- Excellent oxidation resistance at high temperatures for long-term use.
- Improved heat resistance to 1100°C in regulated conditions.
- Prevent creep resistance and maintain strength at high temperatures.
- Excellent weldability, especially in the 310S grade, allows for easy fabrication.
- Resists thermal cycling after repeated heating and cooling.
- Good corrosion resistance in light industrial applications.
- Austenitic structure that remains stable after prolonged durations in the furnace.
- Long life in high-temperature processing systems
- Welded construction is cost-effective and performs well under high temperatures.
Specifications of Stainless Steel 310/310S welded tubes
The following specifications specify the criteria for SS 310/310S welded tubing used in high-temperature service situations, including dimensional tolerances and pressure ratings.
Welded Tube OD : 1/2" OD - 12" OD
ASTM /ASME SA269/A269
Welded
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random, Standard & Cut length
Plain End, Beveled End, Treaded
SCH 10, SCH20, SCH30, SCH40, STD, SCH60, XS, SCH80, SCH120, SCH140, SCH160, XXS
2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Tubes, Finish as per customer Requirements
Types of SS 310 and 310S welded tubes
Our SS 310 welded tube types and 310S welded tube forms are intended for harsh industrial applications, like marine edges, offshore modules, and chemical processing systems. These tubes require temperature control and mechanical stability to avoid oxidation, and scaling.
Pipe Forms
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Round Welded TubesThese tubes are suitable for conventional process pipelines and high-temperature heat service applications.
-
Square Welded TubesDesigned for structural applications in high-temperature situations.
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Rectangular Welded TubesUsed to fabricate and sustain heat-exposed structures.
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Heat exchanger tubesThese tubes are designed for effective heat transfer under extreme thermal stress.
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Boiler TubesDesigned for high-temperature pressure systems.
Contact us today to discuss how Stainless Steel 310/310S Welded Tubes can benefit your application. Whether you need guidance in selecting the right Tubes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
Grade |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
|
310 |
min. |
– |
– |
– |
– |
– |
24.0 |
– |
19.0 |
– |
| 310S | min. max. |
– 0.08 |
– 2.00 |
– 1.50 |
– 0.045 |
– 0.030 |
24.0 26.0 |
– | 19.0 22.0 |
– |
The mechanical strength values indicate that they are suitable for structural and heat-resistant applications that operate at elevated temperatures.
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 310 | 515 | 205 | 40 | 95 | 217 |
| 310S | 515 | 205 | 40 | 95 | 217 |
Stainless Steel Tubes Grades We Offer
Manufacturing Process of 310/310S Stainless Steel Seamless Tubes
Round Bar
Analytic
Cut to Length
Centering
Heating
Perforation
Inspection of Size
Pickling
Inspection of Surface
Lubricating
Cold Drawing (Cold Rolling)
Degreasing
Annealing
Straightening
Cut
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Industrial Applications of 310 & 310S Welded Tubes
SS 310 and 310S welded tubes operate where heat exposure remains constant and material stability becomes critical. Furnace components such as radiant tubes, burners, and heat shields rely on their oxidation resistance. Heat treatment equipment uses them for retorts and muffles that undergo temperature cycles every day. In petrochemical processing units, these tubes are used in cracking systems and reformer lines that are subjected to high temperatures. Power plants use them in boiler sections and heat exchanger assemblies to handle both high pressure and high heat at the same time. Cement and steel industries use them in kiln systems and thermal ducts where scaling resistance reduces maintenance frequency. Performance under heat defines their value.
Why Choose Midland Alloys Inc. for SS 310, 310S Welded Tubes?
Midland Alloys Inc. has extensive technological experience in the manufacturing of heat-resistant stainless steel tubes. We understand that one breakdown in a furnace or boiler can result in significant downtime; therefore, we maintain strict quality control at all stages of manufacturing. Every batch is subjected to thorough in-house and third-party testing to ensure appropriate chemical composition and weld integrity. We offer high-quality SS 310 welded tubes that meet global standards. Our team takes care of global shipments using experienced export packing to make sure that the product arrives in perfect condition. We make sure that the delivery of the product is on time to meet the deadlines. Each product we dispatch has full tracking and documentation.
FAQs
In SS 310S, most applications do not require post-weld heat treatment due to its low carbon content, which minimises carbide precipitation. However, service conditions may dictate specific heat treatment based on design codes.
Furnace manufacturing, petrochemical plants, power generation units, cement production, and heat treatment facilities widely use these tubes for high-temperature service.
Yes. The high chromium content produces a protective oxide layer that resists scale and oxidation at temperatures as high as 1100°C in high-temperature environments.
