Stainless Steel 253MA Seamless Tubes Manufacturer & Supplier
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Midland Alloys Inc. is a trusted manufacturer and supplier of stainless steel 253MA seamless tubes, delivering high-performance solutions for extreme thermal environments. This specialised 253ma alloy is an austenitic heat-resistant grade designed specifically for service conditions where standard stainless steels might fail. Our SS 253MA heat-resistant tube offers a unique combination of high creep strength, and exceptional resistance to oxidation, and carburization at high temperatures. As we use seamless construction, every tube provides uniform wall thickness and structural reliability under intense pressure. These characteristics make them the first choice for industrial furnaces, petrochemical plants, and power generation equipment. We maintain strict quality control and international testing standards to ensure our global clients receive only the most dependable piping components. Reliability starts with the right material.
What is SS 253MA Seamless Tubing?
SS 253MA seamless tubing also known as UNS S30815 is a nitrogen- and aluminium-alloyed austenitic stainless steel that is durable at high temperatures and resistant to oxidation over long periods of time. The grade contains high levels of chromium and silicon, as well as precise quantities of nitrogen and cerium, which promote scale adherence and prevent metal loss in damaging environments. Seamless production uses hot extrusion or piercing followed by rolling, with no welded connections. That detail matters. It allows 253MA stainless steel seamless tubes to handle thermal cycling, pressure changes and uneven heat distribution with fewer weak points. The alloy maintains stable performance during continuous service up to 1100°C, even in carburising or oxidising environments. These tubes are usually supplied in accordance with ASTM A213 TP 253MA, ASTM A269, and ASTM A312 requirements, ensuring chemical consistency, mechanical strength, and dimensional precision across global applications based on UNS S30815.
Benefits of SS 253MA Seamless Tubes
Using SS 253MA seamless tubes provides clear performance benefits in high-heat systems, with minimal failure margin. These materials provide consistent operation in areas where other grades lose strength or scale quickly. Engineers rely on the proven benefits of 253MA seamless tubing to save time for prolong service life.
- Excellent oxidation resistance during continuous exposure to extreme operating temperatures
- High creep strength supports long-term mechanical stability under sustained thermal loads
- Seamless construction removes weld-related stress points in pressure and heat systems
- Strong carburization resistance in furnace and petrochemical process atmospheres
- Handles frequent thermal cycling without surface cracking or loss of integrity
- Low maintenance needs in heat-intensive installations with long operating cycles
- Extended service life improves reliability in demanding thermal environments
These benefits of the SS 253MA seamless tube lead to predictable performance and more affordable prices.
Specification of Stainless Steel 253MA Seamless Tubes
The following specifications define dimensional limits, tolerances, and standards compliance for SS 253MA seamless tubes used in high-temperature service. Values align with ASTM and ASME requirements for heat-resistant stainless steel tubing.
Seamless Tube OD : 1 / 2" NB - 16" NB
ASTM A213, A269, A249, A511, A554 / ASME SA213, SA269, SA249, SA511, SA554
Seamless
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random, Standard & Cut length
Plain Ends (PE), Threaded Ends (TE), Bevelled Ends (BW), Grooved Mechanical Joints or Grooved Ends, TBE (Treaded Both Ends)
SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Tubes, Finish as per customer Requirements
Types of Stainless Steel 253MA Seamless Tubes
Stainless Steel 253MA seamless tubes are supplied in multiple forms to suit varied thermal processing layouts. Each type supports stable performance in high-temperature zones where structural and dimensional reliability matter most.
Pipe Forms
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Round TubeStandard geometry used primarily for furnace piping and high-temperature gas flow systems.
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Square TubeEssential for building structural components and internal supports in heat treatment equipment.
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Rectangular TubeProvides high rigidity for frames and supports within thermal processing units.
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Boiler TubeEngineered specifically for high-temperature steam generation and critical heat transfer applications.
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Heat Exchanger TubeOptimised for thermal exchange systems exposed to the most extreme furnace exhaust gases.
Designed for furnaces, kilns, heat exchangers, and combustion systems, these seamless tube types handle radiant heat, gas flow, and mechanical load without distortion. Different tube forms allow engineers to match geometry with system design and heat exposure patterns.
Contact us today to discuss how Stainless Steel 253 MA Seamless 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 | Range | Ni | C | Cr | Mn | Si | P | Ce | S | N |
|---|---|---|---|---|---|---|---|---|---|---|
| 253 MA | Min. | 10.0 | 0.05 | 20.0 | – | 1.10 | – | 0.03 | – | 0.14 |
| Max. | 12.0 | 0.10 | 22.0 | 0.80 | 2.00 | 0.040 | 0.08 | 0.030 | 0.20 |
| Grade | Tensile Strength min (MPa) | Yield Strength 0.2% Proof min (MPa) | Hardness | Elongation (% in 50mm) min | |
|---|---|---|---|---|---|
| Brinell max (HB) | Rockwell B max (HR B) | ||||
| 253 MA | 515 | 205 | 40 | 201 | 92 |
| Grade | UNS No | Old British | Euronorm | Japanese JIS | Swedish SS | GOST | ||
|---|---|---|---|---|---|---|---|---|
| BS | En | No | Name | |||||
| 253 MA | S 30815 | – | – | 1.4835 | X9CrNiSiNCe21-11-2 | – | 2368 | – |
Stainless Steel Seamless Tubes Grades We Offer
Difference between Stainless Steel 253MA and 304 Seamless Tube?
Stainless Steel 253 MA tubes offer better strength and oxidation resistance at high temperatures. They handle continuous heat above 1000°C without losing shape. Made with nickel, chromium, nitrogen, and rare earth metals, UNS S30815 Seamless Tubes resist scaling and creep. Stainless steel 304 Tube is a standard grade for everyday use. It provides good corrosion resistance and strength but softens under extreme heat. 304 performs well in normal temperatures but is not ideal for high-heat environments. Choose 253 MA tubes for heat-intensive setups like furnaces and heat exchangers. Pick ss 304 tube for general piping, structural parts, and lower-cost applications.
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 253MA Seamless Tubing
The applications of SS 253MA seamless tubes include industries that function under prolonged high temperatures and intense thermal cycles. These tubes sustain industrial furnaces and kilns, where oxidation resistance directly influences service longevity. Heat treatment and annealing processes depend on the alloy’s creep strength to preserve shape and load-bearing capacity during extended operations. In petrochemical cracking plants, 253MA stainless steel tubing is used for radiant coils, and transfer lines subjected to carburising gases. Power generation plants use these tubes in elevated temperature regions of boilers, and auxiliary systems. Heat exchangers and recuperators use the alloy’s stable oxidation properties, whereas cement, steel and glass manufacturing facilities rely on its resilience under sustained radiant heat.
Why Choose Midland Alloys Inc. for 253 MA Seamless Tubes?
Midland Alloys Inc. manufactures and supplies high-quality SS 253MA seamless tubes for heat-critical industrial applications with tight performance margins. Our production process ensures stringent chemical control, a stable grain structure, and uniform wall thickness, all of which contribute to long-term high-temperature performance. Advanced manufacturing controls, along with in-house dimensional, chemical, mechanical and non-destructive testing, provide complete compliance with ASTM and ASME standards while retaining batch-level traceability. As an experienced 253MA seamless tube provider, we carefully manage the entire supply chain, from ultrasonic testing and documentation to export-ready packing that ensures tube integrity during transit. Global logistics cooperation enables us to fulfill tight deadlines without sacrificing accuracy, or quality. Beyond supply, our technical team adds practical expertise in heat-resistant metallurgy, guides customers through complicated working conditions and delivers on time.
FAQs
Seamless construction removes weld seams that can become weak points under thermal cycling and pressure. This improves reliability in high-temperature service.
Yes. High chromium and silicon content, supported by rare-earth additions, provides strong resistance to oxidation and scale formation at elevated temperatures.
Furnace manufacturing, petrochemical processing, power generation, heat treatment, and the cement, steel, and glass industries widely use this grade.
These tubes commonly meet ASTM A213, ASTM A269, and ASTM A312 standards for heat-resistant stainless steel tubing.
