SS 310 & 310S Seamless Pipe Manufacturer & Supplier
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Midland Alloys Inc. is a reliable manufacturer and supplier of SS 310 and 310S seamless pipe, with a reputation for strict metallurgical control during the manufacturing process of high-temperature austenitic stainless steel pipes designed to be used in extreme heat, oxidation, and carburising environments where material stability is critical to plant availability. Stainless steel 310 seamless pipe and SS 310S seamless pipe are manufactured in accordance with ASTM, ASME, and EN requirements for pressure-bearing seamless pipes, providing consistent quality and global compliance. To accommodate challenging plant design and operating conditions, a wide range of NPS sizes, schedules, wall thicknesses, and heat-resistant surface conditions is available. The low-carbon 310S grade improves long-term thermal stability by reducing carbide production, and grain boundary sensitisation during extended high-temperature exposure. With export-grade packaging, verified quality systems, and a strong global supply network, we are known as a reliable SS 310 seamless pipe manufacturer, high-temperature stainless steel pipe specialist, and experienced seamless pipe exporter.
What is SS 310 & 310S Seamless Pipe?
SS 310 and 310S seamless pipes are high-alloy chromium–nickel austenitic stainless steel pipes manufactured without welded joints, providing uniform structure across the section. Production begins with hot piercing, or extrusion of solid billets, followed by controlled sizing and heat treatment to achieve precise dimensions. This seamless route improves resistance to oxidation, scaling, and thermal fatigue at elevated temperatures. SS 310 seamless pipe operates effectively in both continuous, and intermittent heat service, when temperature fluctuations cause stress on the material. The decreased carbon content of SS 310S seamless stainless steel pipe prevents carbide precipitation during extended heat exposure, reducing the possibility of intergranular weakness. These characteristics make 310s heat-resistant seamless pipe and 310 alloy seamless pipe suitable option for high-temperature pressure systems.
Benefits of SS 310 And 310S Seamless Pipe
Seamless SS 310 and 310S pipes deliver consistent performance where heat, pressure, and atmosphere vary through the duty cycle. Engineers value them for stability rather than headline strength alone.
- High-temperature strength retained during long operating cycles
- Strong oxidation and scaling resistance in furnace atmospheres
- Stable performance under repeated thermal cycling conditions
- Lower failure risk due to seamless construction
- Resistance to carburisation and sulfidation environments
- Extended service life in continuous high-heat operations
- Predictable behaviour under pressure at elevated temperatures
These points define the practical SS 310 seamless pipe advantages and explain the preference for SS 310S high-temperature pipe in critical services.
Specification of Stainless Steel 310 & 310S Seamless Pipe
The following are the standard dimensional and manufacturing specifications for stainless steel 310 and 310S seamless pipes, which are used to ensure pressure integrity, heat resistance, and dimensional accuracy across service conditions.
Seamless Pipe OD : 1/8 -12" NPS
ASTM A312, A358 / ASME SA312, SA358
Seamless
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random & Cut Length.
Plain End, Beveled End, Treaded
SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, SCH 80S, SCH60, SCH80, SCH120, SCH140, SCH160, SCH XXS, SCH XS
No. 2B - Mill finish/ Matte finish, No.8 - Mirror finish, No. 4 - Brushed finish, Bright, Annealing, Polished, Mirror
Types of SS 310, 310S Seamless Pipes
Critical pressure service and extreme temperature exposure demand different pipe configurations depending on the industrial footprint. We supply various forms of seamless piping to meet these heavy-duty engineering requirements.
Standard Seamless Pipe: This is the primary choice for high-temperature fluid and gas transmission.
Pipe Forms
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Thick-Wall Seamless PipeWe manufacture these for systems facing extreme internal pressure and thermal stress.
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Boiler & Heat Exchanger PipeUsed in architectural and structural applications requiring angular profiles.
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Furnace Radiant PipeProvides greater strength in load-bearing regions and flat structures.
Contact us today to discuss how Stainless Steel 310/310S Seamless Pipes can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
The chemical composition ranges for SS 310 and 310S seamless pipes are modified in accordance with appropriate ASTM and EN standards to provide oxidation resistance and high-temperature stability.
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| SS 310 (min.) | – | – | – | – | – | 24.0 | – | 19.0 | – |
| SS 310 (max.) | 0.25 | 2.0 | 1.50 | 0.045 | 0.030 | 26.0 | – | 22.0 | – |
These 310S material elements ensure the grade performs reliably in high-temperature service, especially where welding and long exposure to heat are required.
Mechanical property requirements for SS 310 and 310S seamless pipes meet through solution annealing and testing, ensuring consistent strength and ductility at high temperatures.
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness Rockwell B (HR B) max | Hardness Brinell (HB) max |
| 310 – 310S | 515 | 205 | 40 | 95 | 217 |
Stainless Steel Seamless Pipe Grades We Offer
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 SS 310 & SS 310S Seamless Pipe
SS 310 and 310S seamless pipes see wide use in furnaces, petrochemical units, power plants, refineries, and thermal processing lines where high temperatures remain constant. Typical applications include heat exchangers, boilers, radiant pipes, kiln systems, and high-temperature transfer lines. These pipes maintain strength and surface stability in oxidising atmospheres and high-heat zones, where scale formation and metal loss must stay controlled. Their predictable performance supports long operating cycles, which procurement teams value when planning maintenance intervals.
Why Choose Midland Alloys Inc for SS 310 & 310S Seamless Pipe?
Midland Alloys Inc. understands that seamless integrity is essential in thermal stress situations, where long-term heat exposure, and harsh atmospheres require consistent material performance. We manufacture SS 310 and 310S seamless pipes that are designed to withstand oxidation and carburization. This reduces the risk of weak areas that are commonly found in welds when the pipes are used at high temperatures. Strict grain structure control ensures that each pipe operates consistently under continuous heat, making the low-carbon 310S grade the best choice for applications that require long-term stability without the risk of sensitisation, or excessive carbide production. Designed for furnaces and demanding process plants, these heat-resistant seamless pipes are supplied with full inspection, traceability, and mill test reports. Backed by transparent processes, precise documentation, and export-grade quality standards, Midland Alloys Inc. serves as a dependable heat-resistant seamless pipe supplier and experienced exporter for global high-temperature projects.
FAQs
The high chromium and nickel content allows the pipe to form a protective oxide layer that prevents further metal wastage at temperatures up to 1150°C.
The difference between SS 310 and SS 310S seamless pipes is the carbon concentration. SS 310 contains up to 0.25% carbon, which improves its creep strength at high temperatures. SS 310S is a low-carbon grade (≤0.08%), which offers superior weldability, reduced sensitization risk, and increased resistance to intergranular corrosion.
Yes. The 310S grade performs well in prolonged high-temperature application, with a low risk of intergranular degradation.
SS 310 seamless pipe is widely used in industry like furnaces, heat exchangers, boilers, radiant tubes, petrochemical plants, and other high-temperature processing equipment.
