253 MA Tubes | UNS S30815 ASTM A213 / A249 Supplier India

253 MA (UNS S30815, EN 1.4835) Heat-Resistant Tubes to ASTM A213 and A249

Dinesh Tube India supplies and exports 253 MA tubes from Mumbai for furnaces, heat-treatment equipment and other high-temperature service. 253 MA is a heat-resistant austenitic stainless steel, UNS S30815 (EN 1.4835, X9CrNiSiNCe21-11-2). We supply seamless tube to ASTM A213 / ASME SA213 and welded tube to ASTM A249 / ASME SA249, sized by outside diameter and wall thickness, solution annealed, with EN 10204 3.1 mill test certificates.

253 MA has only about 11% nickel, but small additions of silicon, nitrogen and cerium give it oxidation resistance up to about 1100 °C and higher creep strength than 310S. That makes it a lower-cost alternative to 310S and 309S for many furnace parts, especially in sulphur-bearing oxidising gases.

253 MA® is a trademark of Outokumpu. Dinesh Tube India is an independent supplier; tubes are supplied to UNS S30815 / EN 1.4835 from approved mills, with the producing mill shown on the certificate.

Table of Contents

Specification & Sizes
Equivalent Grades
Chemical Composition
Mechanical Properties
253 MA vs 304H vs 309S vs 310S
Why 253 MA Works at High Temperature
Tube Weight Table
Applications
FAQs

253 MA (UNS S30815) heat-resistant tubes to ASTM A213 and A249

253 MA Equivalent Grades

Designation	Equivalent
UNS	S30815
EN / Werkstoff Nr.	1.4835
EN name	X9CrNiSiNCe21-11-2
SS (Sweden)	2368
Tube standards	ASTM A213 (seamless), ASTM A249 (welded); EN 10216-5
Other names	Grade 253MA; sometimes ordered as "S30815" or "1.4835" with no trade name

There is no exact AISI 300-series equivalent. The nearest common grades are 309S and 310S; see the comparison below.

253 MA Tube Chemical Composition (UNS S30815, %)

Element	UNS S30815
Chromium (Cr)	20.0–22.0
Nickel (Ni)	10.0–12.0
Silicon (Si)	1.40–2.00
Nitrogen (N)	0.14–0.20
Cerium (Ce)	0.03–0.08
Carbon (C)	0.05–0.10
Manganese (Mn), max	0.80
Phosphorus (P), max	0.040
Sulphur (S), max	0.030
Iron (Fe)	Balance

253 MA Tube Mechanical Properties (Minimum)

Tensile Strength	Yield Strength (0.2%)	Elongation	Hardness, max	Density
600 MPa (87 ksi)	310 MPa (45 ksi)	40%	95 HRB	7.8 g/cm³

Values for the solution-annealed condition. Check the current ASTM A213 / A249 edition and the mill certificate for governing values.

253 MA vs 304H vs 309S vs 310S

Point	304H	309S	310S	253 MA
Cr / Ni (nominal %)	18 / 8	23 / 13	25 / 20	21 / 11 + Si, N, Ce
Max. oxidation temperature in air (approx.)	870 °C	1000 °C	1100 °C	1100 °C
Creep strength at 800–900 °C	Fair	Fair	Good	Very good
Oxidising sulphur-bearing gases	Fair	Good	Good	Very good (low nickel)
Reducing or carburising gases	Fair	Fair	Good	Fair
Relative cost	Lowest	Moderate	Highest	Moderate

253 MA usually replaces 310S where strength at temperature and sulphur resistance matter. Where the atmosphere is reducing or carburising, 310S or a nickel alloy such as Inconel 600 / 601 is the safer choice.

Why 253 MA Works at High Temperature

Cerium and silicon: together they form a thin, tightly adherent oxide scale that resists spalling, even under some thermal cycling.
Nitrogen and carbon: raise creep strength, so thinner or lighter tubes can carry the same load at 600–1000 °C.
Low nickel: better than high-nickel alloys in oxidising sulphur-bearing gases, and lower cost than 310S.
Limits: not designed for aqueous corrosion; sensitised by long exposure at 425–860 °C; not recommended for reducing or carburising atmospheres or above about 1100–1150 °C, where nickel alloys are needed.

253 MA Tube Weight Table (kg/m)

OD	1.65 mm wall	2.11 mm wall	2.77 mm wall	3.40 mm wall
19.05 mm (3/4")	0.703	0.876	1.105	1.304
25.40 mm (1")	0.960	1.204	1.536	1.833
31.75 mm (1¼")	1.217	1.532	1.967	2.362
38.10 mm (1½")	1.473	1.861	2.398	2.891
50.80 mm (2")	1.987	2.517	3.260	3.948
63.50 mm (2½")	2.500	3.174	4.121	5.006

Weight (kg/m) = (OD − wall) × wall × 0.0245, using density 7.8 g/cm³, with OD and wall in mm. Other sizes on request.

253 MA Product Range

253 MA Pipes

S30815 seamless and welded pipe by NPS and schedule to ASTM A312.

253 MA Plate

ASTM A240 / EN 10095 sheet and plate for furnace parts and hoods.

253 MA Flanges

Flanges and fittings in UNS S30815.

Need 253 MA tubes? Send the OD, wall, length, seamless or welded, quantity and operating temperature to kamlesh@dineshtube-india.com or call +91 83559 10913. You can also send an enquiry.

Fabrication and Testing

Welding: GTAW, GMAW or SMAW with matching 253 MA-type filler (22.12HT) for high-temperature service; ER309 filler is sometimes used for lower temperatures. No post-weld heat treatment is normally needed.
Bending: bends cold like other austenitic grades; solution anneal (1050–1150 °C) after heavy cold work if required.
Testing: each tube is tested to ASTM A213 or A249, including hydrostatic or eddy-current testing and flattening and flare tests, with PMI on request.

253 MA Tube Applications

Radiant tubes and burner tubes for heat-treatment furnaces
Recuperators and heat-recovery tubes
Furnace rolls, muffles and retort parts
Thermocouple protection tubes
Petrochemical and refinery tube hangers and supports
Kiln, incinerator and boiler internals

Furnace, heat-treatment and high-temperature uses of 253 MA tubes

253 MA Tubes: FAQs

What is 253 MA?

253 MA is a heat-resistant austenitic stainless steel, UNS S30815 (EN 1.4835), with about 21% chromium and 11% nickel plus silicon, nitrogen and cerium. It resists oxidation up to about 1100 °C and has high creep strength.

What is the equivalent of 253 MA?

The equivalents are UNS S30815, EN 1.4835 (X9CrNiSiNCe21-11-2) and SS 2368. Seamless tube is made to ASTM A213 / ASME SA213, welded tube to ASTM A249 / ASME SA249. There is no exact AISI equivalent; 309S and 310S are the nearest common grades.

Which standard covers 253 MA tubes?

Seamless UNS S30815 tube is covered by ASTM A213 (ASME SA213) and welded tube by ASTM A249 (ASME SA249). 253 MA pipe is covered by ASTM A312.

What is the difference between 253 MA and 310S?

253 MA has much less nickel (11% vs 20%) but similar oxidation resistance, higher creep strength and better resistance to oxidising sulphur-bearing gases, at lower cost. 310S is better in reducing or carburising atmospheres.

What is the maximum temperature for 253 MA tubes?

253 MA resists oxidation in air up to about 1100 °C. For structural and pressure parts it is typically used between about 500 and 900 °C. Above 1100–1150 °C, or in carburising gases, nickel alloys are recommended.

How much does a 253 MA tube weigh?

Weight in kg/m = (OD − wall) × wall × 0.0245, with OD and wall in mm. For example, a 25.4 × 2.11 mm tube weighs about 1.20 kg/m.

What is the price of 253 MA tubes?

The price depends on OD, wall, length, seamless or welded, quantity and certification, and on nickel prices at the time of order. Send your requirement to kamlesh@dineshtube-india.com or call +91 83559 10913 for a current quote.

Export Destinations for 253 MA Tubes

We supply 253 MA tubes across India to furnace builders, heat-treatment shops, cement, steel and petrochemical plants, and export them to Japan, South Korea, Singapore, Malaysia, Indonesia, Vietnam and Thailand in Asia; the Middle East (UAE, Saudi Arabia, Qatar, Oman, Kuwait); Africa (Egypt, South Africa) and Europe on request.

253 MA (UNS S30815) Tubes