What are the specifications of 253 MA Seamless Pipe?

Available in UNS S30815, OD 1/2"-16" NB, Sch 5S-80S, hot finished or cold drawn seamless construction, with cerium controlled at 0.03-0.08%.

What makes 253 MA suitable for cyclic high-temperature service?

Its cerium and nitrogen additions form a highly adherent oxide scale that resists spalling under thermal cycling, unlike many standard heat-resistant grades that shed scale when repeatedly heated and cooled.

How does 253 MA compare to 310S at high temperature?

253 MA offers comparable or better oxidation resistance in cyclic service with notably higher creep strength due to nitrogen strengthening, though 310S may still be preferred for certain steady-state, non-cyclic applications.

Is 253 MA weldable despite its rare-earth alloying?

Yes, it welds well with matched or compatible high-temperature filler metals; no special stabilization is required since carbon is kept moderate and controlled.

Does Sakshi Forge provide Material Test Certificates (MTC) for 253 MA Seamless Pipe?

Yes, MTC as per EN 10204 3.1 is provided with every dispatch along with inspection reports.

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253 MA Seamless Pipe - Heat Resistant Austenitic Pipe with Rare Earth Additions | Sakshi Forge

Rare-Earth Cerium Micro-Alloyed Heat-Resistant Pipe for Cyclic Service Up to 1150°C

Cerium (rare earth) micro-alloying delivers exceptional oxide scale adhesion under thermal cycling up to 1150°C

High creep-rupture strength superior to 310S due to nitrogen and silicon solid-solution strengthening

Resists spalling, carburization, and sulfur-bearing combustion gas attack in furnace environments

EN 10204 3.1 MTC100% PMI TestedISO 9001:2015 CertifiedHydrostatic Tested

Hygienic Steel Grade

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MTC EN 10204 3.1 Included

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Electro-Chemical Finish Certificate

Response turnaround: Under 2 hours

Product Profile

253 MA (UNS S30815 / EN 1.4835) is a high-temperature heat-resistant austenitic stainless steel seamless pipe specifically micro-alloyed with rare earth elements (cerium, 0.03%-0.08%) alongside elevated silicon (1.4%-2.0%) and nitrogen (0.14%-0.20%). The addition of cerium dramatically enhances oxide scale adhesion, preventing protective surface scale from spalling during severe thermal cycling up to 1150°C (2100°F)-a major vulnerability of standard 309S and 310S heat-resistant grades under cyclic temperature conditions. Furthermore, nitrogen and high carbon (0.05%-0.10%) yield high creep-rupture strength, allowing thinner wall sections under structural loads at elevated temperatures. Sakshi Forge manufactures 253 MA seamless pipes via hot extrusion and cold drawing, followed by solution annealing. These pipes are widely specified for industrial furnace rollers, calciner pipes, waste incinerator ducting, burner nozzles, and cement kiln equipment subject to intense thermal shock.

Terminology & Abbreviations

UNS S30815|S30815

Werkstoff 1.4835|1.4835

253 MA Heat Resistant|253MA

ASTM A312 S30815|S30815

Key Technical Facts

Alloyed with 20-22% Cr, 10-12% Ni, 1.4-2.0% Si, 0.14-0.20% N, and 0.03-0.08% Cerium (Ce)

Rare-earth cerium addition locks protective oxide scale to base metal, preventing scale spalling during thermal shock

Operating service temperature ranges up to 1150°C (2100°F) in air and cyclic combustion atmospheres

High nitrogen content provides creep strength superior to standard 310S at temperatures above 850°C

Good resistance to sulfur-bearing gases (SO2/SO3) under oxidizing conditions

Solution annealed at 1050°C - 1150°C to optimize grain structure and high-temperature ductility

Seamless hot extruded and cold drawn construction ensuring uniform wall thickness and bore smoothness

Supplied with complete heat lot traceability and EN 10204 3.1 material certification

Why Choose Sakshi Forge

Our commitment to sterile, high-purity processing makes us a trusted manufacturing partner globally.

100% Heat Lot Traceability

Every pipe stamped with heat number matching EN 10204 3.1 MTC

Positive Material Identification (PMI)

Handheld XRF testing on every length prior to dispatch

Advanced NDT Inspection

Hydrostatic test and Eddy Current / Ultrasonic flaw detection on all orders

Precision Cold Drawing

Tighter wall thickness tolerances and superior internal bore smoothness

Custom Cut Lengths

Fixed lengths up to 12 meters or custom cut-to-length options to eliminate jobsite scrap

Ferrite & Phase Balance Testing

Ferritescope testing for duplex and super duplex grades to ensure 40-60% phase balance

High-Temperature Stabilization

Controlled heat treatment to fully precipitate carbides and optimize creep life

Pan-India & Export Freight

Fast dispatch across India and seaworthy export packing for global projects

Extensive Mill Stocking

Immediate inventory availability in standard schedules from Sch 10S to Sch 160

Third-Party Inspection Approved

Full support for TUV, SGS, DNV, Bureau Veritas, and Lloyds audits

Frequently Asked Questions

Common technical and pricing queries regarding specifications and ordering.

253 MA seamless pipe is manufactured to UNS S30815 / EN 1.4835. It features 21% Chromium, 11% Nickel, 1.7% Silicon, 0.17% Nitrogen, and 0.05% Cerium for high-temperature service.

Partner with Sakshi Forge for Reliable Industrial Steel Solutions

Delivering precision-engineered flanges, pipes, and forged steel components designed for strength, durability, and performance in critical high-pressure industrial applications.