The 253MA seamless pipe, also known as alloy 253MA, is a high-performance stainless steel pipe made mainly of chromium (20-22%), nickel (10-12%), nitrogen (0.14-0.2%), cerium (0.03-0.08%), silicon (1.4-2%), and other rare earth metals. It is one of the grades of stainless steel seamless pipes.
Stainless Steel 253MA Seamless Pipes Manufacturer
Stainless Steel 253 MA Seamless Pipe is a high-temperature austenitic grade manufactured by Zhejiang Xintongda Special Steel Manufacturing Co., Ltd. (XTD). Officially identified as UNS S30815 / EN 1.4835, this alloy is produced in strict accordance with ASTM A312 TP253MA. It contains approximately 20–22% chromium, 10–12% nickel, and 0.14–0.20% nitrogen, along with controlled additions of cerium and other rare earth elements that contribute to its high-temperature oxidation resistance. This composition provides good resistance to carburisation, combustion gases, and cyclic oxidation, while the grade also offers high creep strength and good weldability for demanding thermal service. This 253 MA stainless steel pipe is suitable for metallurgical, petrochemical, power generation, furnace, and heat-treatment applications involving sustained or cyclic exposure to elevated temperatures. XTD supplies SS 253 MA pipe in various outside diameters, wall thicknesses, and lengths according to project requirements. 253 MA SS pipe can be supplied with material documentation and traceability for demanding high-temperature applications.
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Standard
ASTM A312
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OD Range
6-1016 mm
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Thickness
1-65 mm
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Length
≤ 18 m
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Technical Data
Technical Data
SS 253 MA Pipes Manufacturing Process
To manufacture the UNS S30815 Seamless Pipes, we first take a solid billet of this alloy and heat and pierce it to form a hollow shell. This hollowed shell then undergoes hot working and cold finishing to achieve the required dimensions. Then we carry out solution annealing to stabilise the austenitic structure and improve its resistance to oxidation. The final step is undergoing pickling and straightening for the final touches, after which the pipe is sent for testing. To learn more about the whole process, kindly visit this page.
What are the Key Features of 253 MA SS Seamless Pipes?
- High Creep Strength: The 253MA seamless pipe gets its high creep strength due to nitrogen (0.14-0.2%) and cerium (0.03-0.08%). These elements create super-fine particles inside the alloy and lock dislocations. This process prevents the pipe from slow bending and stretching at high temperatures.
- High-Temperature Performance: Silicon (1.4-2%), when combined with nitrogen and other rare earth metals, helps maintain the pipe’s structural integrity up to 1150 °C.
- Excellent Oxidation Resistance: The alloy 253MA pipe uses a combination of two protective layers to provide excellent oxidation resistance: an outer chromia layer [made of chromium (20-22%)] and an inner silica layer [a glass-like layer made of silicon].
- Good Weldability: The small amount of ferrite and the higher nitrogen content in this alloy decrease the risk of hot cracking during the welding process. This makes alloy 253 MA easily weldable.
253MA Seamless Stainless Steel Pipes Equivalent Material
UNS S30815 is the standard designation of the 253MA seamless pipe. It is also recognised as DIN 1.4835.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| 253MA | S30815 | - | 0Cr21Ni11N | - | X9CrNiSiNCe21-11 | 1.4835 | - |
ASTM A312 253MA Seamless Pipe Size Tolerance
The ASTM A312 253MA pipe has different size tolerances for different standards and dimensions (OD and wall thickness). Have a look at the table below to learn the different tolerances our pipe provides.
| Standard | Outside Diameter | Thickness | Length | ||||
| ASTM A312 | - | O.D. ≤ | 48.26 mm | +0.40 mm | -0.80 mm | Nominal Thickness ±12.5% | 0 mm to +6 mm |
| 48.26 mm < | O.D. ≤ | 114.3 mm | ±0.80 mm | ||||
| 114.3 mm < | O.D. ≤ | 219.08 mm | +1.60 mm | -0.80 mm | |||
| 219.08 mm < | O.D. ≤ | 457.2 mm | +2.40 mm | -0.80 mm | |||
| 457.2 mm < | O.D. ≤ | 660.4 mm | +3.20 mm | -0.80 mm | |||
| 660.4 mm < | O.D. ≤ | 836.6 mm | +4.00 mm | -0.80 mm | |||
| 863.6 mm < | O.D. ≤ | - | +4.80 mm | -0.80 mm | |||
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
What are the common industrial applications of 253 MA Seamless Pipes?
The 253 MA [S30815] Pipes are used in those industries that face oxidation, harsh combustion gases, carburisation, etc.
Furnace Components
Used in furnace rollers, burner components, boiler nozzles, thermocouple protection pipes, radiation components, injection of pulverised coal in blast furnaces, etc.
Mineral Equipment and Cement Production
SS 253MA pipe is used in sintering equipment, recuperators, and continuous casting systems for the mining industry. For cement production, it is used in serving cement kilns, mud incineration plants, waste heat recovery tubes, and heat recovery systems.
Pharmaceutical
The 253MA seamless pipe has a limited but dedicated application in sterilisation equipment, heat exchangers, etc.
Petrochemical & Refining Industry
It is mainly used in hot hydrocarbon vapour lines, transfer lines carrying hot process gases, and cracked gas piping in thermal processing units.
Power Generation
253MA pipe is found in superheater connecting pipes, hot flue gas ducting, auxiliary furnace piping in power plants, and exhaust gas piping from boilers.
Frequently Asked Questions
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What is 253MA Seamless Pipe?
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What are the benefits of using SS 253MA Seamless Pipe?The benefits of using SS 253MA seamless pipe for your industrial applications are high creep strength, excellent oxidation resistance, very good high-temperature performance, good weldability, etc.
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Difference between 254SMO and 253MA Stainless Steel Pipe?The main difference between 254SMO and 253MA is that 254SMO provides high chloride resistance due to a high molybdenum, nickel, and nitrogen combination, and 253MA is better at resisting oxidation at high temperatures due to its unique blend of chromium, nickel, nitrogen, cerium, silicon, and other rare earth metals.
- SS 253 MA Pipes Manufacturing Process
- What are the Key Features of 253 MA SS Seamless Pipes?
- 253MA Seamless Stainless Steel Pipes Equivalent Material
- ASTM A312 253MA Seamless Pipe Size Tolerance
- 100% Certified Testing & Documentation
- What are the common industrial applications of 253 MA Seamless Pipes?
- Frequently Asked Questions