Stainless Steel 253MA Round Bar
➡️ Alloy 253 MA | UNS S30815 | EN 1.4835 | ASTM A276
➡️ ASTM, EN, JIS & International Standards
➡️ Supply Conditions
➡️ Multiple Diameters & Supply Lengths
➡️ Global Export & International Delivery
Country of Origin:
Europe, Japan, USA
Material Type:
Stainless Steel
UNS Number:
S30815
Wr. No.:
1.4835
MTC Available:
EN 10204 3.1
Product Description for Stainless Steel 253MA Round Bar
253MA Round Bar is a solid cylindrical bar produced from heat-resisting austenitic stainless steel UNS S30815, known commercially as 253 MA, a registered trademark of Outokumpu. Bar is supplied to ASTM A276 / A276M and ASTM A479 / A479M, with dimensional requirements from ASTM A484 / A484M, and the European designation is EN 1.4835 (X9CrNiSiNCe21-11-2).
The grade combines 20.0-22.0% chromium and 10.0-12.0% nickel with a silicon addition of 1.40-2.00%, a nitrogen addition of 0.14-0.20% and a small but critical cerium addition of 0.03-0.08%. The silicon and cerium together produce an oxide scale that grips tightly and resists spalling under thermal cycling, while nitrogen adds creep strength and solid solution strengthening. Oxidation resistance runs to approximately 1150 deg C and creep strength comes out well above Type 310S, at a much lower nickel content and therefore lower cost.
Because nickel is only around 11%, the alloy is economical relative to the traditional 25Cr-20Ni heat-resisting grades. Its higher strength allows thinner sections, which further reduces cost and thermal mass in cycling furnace equipment.
Bar is supplied solution annealed in diameters from about 8 mm to 250 mm and lengths of 3 to 6 m.
Typical applications include furnace rollers, muffles, retorts and radiant tubes, heat-treatment fixtures and baskets, burner and combustion components, boiler and power plant hardware, cement and lime kiln parts, waste incineration internals and diesel engine and turbine components. Industries served include heat treatment, power generation, cement, petrochemical and waste-to-energy.
Common Applications of Stainless Steel 253MA Round Bar
➡️ Machined shafts, spindles, valve stems, pump sleeves and pins for food, beverage, dairy and pharmaceutical equipment, where the passive chromium oxide film resists both product acids and caustic clean-in-place chemicals.
➡️ Fasteners, studs, bolts, threaded rod and anchor components produced from bar stock, chosen for corrosion resistance combined with the ductility needed for cold heading and thread rolling.
➡️ Chemical, water treatment and general process plant parts such as agitator shafts, flange blanks, nozzles and support components handling water, steam and mildly corrosive media free of significant chlorides.
➡️ Architectural and structural hardware including handrail stanchions, balustrade fittings, tension rods and bollards, where a bright ground or polished bar finish provides both appearance and low maintenance.
International Equivalent Grade for 253 MA Round Bar
Standard
Country / Region
Grade
ASTM A276 / A276M
USA
UNS S30815 - bars and shapes
ASTM A479 / A479M
USA
UNS S30815 - bars for pressure vessel service
ASTM A484 / A484M
USA
UNS S30815 - dimensional requirements
EN 10095
Europe / EU
1.4835 (X9CrNiSiNCe21-11-2)
BS EN 10095
United Kingdom
1.4835 (X9CrNiSiNCe21-11-2)
ISO 15510
International
X9CrNiSiNCe21-11-2
Technical Specification for Stainless Steel 253MA Round Bar
Specification
Value
Unit
Material
Heat-resisting austenitic stainless steel
-
Grade
253 MA / UNS S30815 / 1.4835
-
Product Form
Round bar / rod
-
Standard
ASTM A276 / A276M and ASTM A479 / A479M
-
Diameter
8 - 250 (available range)
mm
Length
3 - 6 (standard random or fixed)
m
Manufacturing Process
Hot rolled, forged or cold drawn
-
Production Route
EAF / AOD melting, continuous cast or ingot, hot rolling or forging, solution annealing
-
Surface Finish
Hot-finished and pickled, peeled, rough turned, cold-drawn, ground, polished
-
Heat Treatment / Delivery Condition
Solution annealed and rapidly cooled
-
Solution Annealing Temperature
1050 - 1150 followed by rapid cooling (typical)
deg C
Maximum Continuous Service Temperature
1150 in oxidising atmosphere (typical)
deg C
Tolerance Standard
ASTM A484 / A484M
-
Carbon Equivalent (CEV)
Not applicable to austenitic stainless steel
-
Density
7.80 (typical)
g/cm3
Melting Range
1350 - 1400 (typical)
deg C
Thermal Conductivity
15.0 at 20 deg C (typical)
W/m.K
Coefficient of Thermal Expansion
17.0 at 20 - 100 deg C (typical)
micro-m/m.K
Specific Heat
500 at 20 deg C (typical)
J/kg.K
Electrical Resistivity
0.85 (typical)
micro-ohm.m
Modulus of Elasticity
200 (typical)
GPa
Magnetic Properties
Non-magnetic in the solution annealed condition
-
Applicable Testing Standard
ASTM A370, ASTM E8 / E8M, ASTM E10, ASTM E112, ASTM E415
-
Certification / Inspection Documents
EN 10204 Type 3.1 or 3.2 mill test certificate
-
Technical Specifications
Get the key technical specifications for Stainless Steel 253MA Round Bar
253MA Round Bar is supplied to ASTM A276 / A276M for general bars and shapes, or to ASTM A479 / A479M where the material is used in pressure vessel and boiler construction under the ASME Boiler and Pressure Vessel Code. Dimensional tolerance, straightness and surface requirements follow ASTM A484 / A484M. In Europe the material is specified to EN 10095 as grade 1.4835.
Solution annealing is carried out at approximately 1050-1150 deg C followed by rapid cooling. Rapid cooling is important because slow cooling through the intermediate range allows carbide and sigma phase precipitation, which reduces room-temperature ductility.
Fabrication behaviour is closer to Type 310S than to the higher-alloyed nickel grades. Machining is somewhat harder than for Type 304 because of the silicon and nitrogen content and the associated work hardening, so rigid setups, sharp positive rake tooling and generous coolant are recommended.
Welding is straightforward using matching 253 MA filler or a suitable over-alloyed nickel-base consumable, and no preheat or post-weld heat treatment is required. Heat input should be moderate to limit grain growth.
An important service point is that the grade should not be used in strongly sulphidising or highly carburising atmospheres, where higher-nickel alloys behave differently and a specific assessment is required.
Testing normally includes analysis to ASTM E415, tensile testing to ASTM A370 and ASTM E8 / E8M, hardness to ASTM E10 and grain size to ASTM E112.
Chemical Composition for Stainless Steel 253MA Round Bar
Element
Symbol
Min
Max
Unit
Carbon
C
0.05
0.10
%
Manganese
Mn
-
0.80
%
Silicon
Si
1.40
2.00
%
Phosphorus
P
-
0.040
%
Sulfur
S
-
0.030
%
Chromium
Cr
20.0
22.0
%
Nickel
Ni
10.0
12.0
%
Nitrogen
N
0.14
0.20
%
Cerium
Ce
0.03
0.08
%
Iron
Fe
Balance
Balance
%
Chemical Composition
View the chemical composition and applicable material limits for 253 MA Round Bar
Chromium at 20.0-22.0% forms the primary protective oxide scale and provides the base level of high-temperature oxidation resistance.
Nickel at 10.0-12.0% is deliberately modest. It stabilises the austenitic structure and contributes to creep strength and carburisation resistance, but at roughly half the level of the traditional 25Cr-20Ni heat-resisting grades, which is the main reason for the alloy’s cost advantage.
The 1.40-2.00% silicon forms a silica-rich sub-layer beneath the chromium oxide, slowing inward diffusion of oxygen and carbon and helping the scale stay put.
Cerium at 0.03-0.08% is the distinguishing addition and is present in very small quantity. Rare earth elements such as cerium segregate to the oxide-metal interface and hold the scale down, preventing the spalling that otherwise occurs during repeated heating and cooling. This is the principal reason the alloy outperforms conventional grades under thermal cycling.
Nitrogen at 0.14-0.20% strengthens the solid solution at both room and elevated temperature and adds usefully to creep and stress-rupture strength. That is how the grade ends up stronger than Type 310S while carrying far less nickel.
Unusually, carbon is controlled within a range of 0.05-0.10% rather than merely capped. It contributes to creep strength through carbide precipitation, but the level is kept moderate to limit embrittlement. Manganese, phosphorus and sulphur are held low to protect hot workability and scale adherence.
Mechanical Properties for Stainless Steel 253MA Round Bar
Mechanical Property
Value
Unit
Tensile Strength
600 (minimum, solution annealed)
MPa
Yield Strength 0.2% Proof
310 (minimum, solution annealed)
MPa
Elongation in 50 mm
40 (minimum, solution annealed)
%
Reduction of Area
50 (minimum, solution annealed)
%
Hardness
No Brinell limit specified by ASTM A276 for this grade
HBW
Hardness
Approximately 190 - 217 in the solution annealed condition (typical)
HBW
Impact / Charpy V-Notch
Not mandatory under ASTM A276 unless specified
J
Modulus of Elasticity
200 (typical at room temperature)
GPa
Mechanical Properties
Check the key mechanical properties and performance requirements of 253 MA Round Bar
The values listed are the room-temperature minima given in ASTM A479 / A479M and ASTM A276 / A276M for UNS S30815 bar in the solution annealed condition: 600 MPa minimum tensile strength, 310 MPa minimum 0.2% offset yield strength, 40% minimum elongation in 50 mm and 50% minimum reduction of area. ASTM A276 sets no Brinell maximum for this grade, so hardness figures are typical values and a ceiling should be stated on the order if required. Testing follows ASTM A370 and ASTM E8 / E8M.
The minimum yield strength of 310 MPa is notably high for a heat-resisting austenitic grade and comes principally from the nitrogen addition. It is roughly 50% above the 205 MPa minimum for Type 310S, and the advantage is retained at elevated temperature, allowing thinner sections and lower thermal mass in furnace hardware.
The grade is not hardenable by heat treatment. Solution annealing dissolves carbides and restores ductility, and any strength above the annealed minima comes from cold work, which is lost on heating to service temperature.
Room-temperature properties are rarely the governing design criterion. Selection is driven by creep and stress-rupture performance and by scaling resistance, and design at temperature should use the allowable stresses from the applicable code rather than ambient values.
As with other austenitic heat-resisting steels, prolonged exposure between roughly 600 and 900 deg C precipitates sigma phase and carbides, reducing room-temperature ductility and impact toughness even though high-temperature performance is largely unaffected.
Dimension / Sizes for Stainless Steel 253MA Round Bar
Dimension / Size
Value
Unit
Diameter (available range)
8 - 250
mm
Standard Length
3 - 6
m
Custom Length
Cut to length on request
-
Diameter Tolerance
Per ASTM A484 / A484M, class depends on size and finish
-
Length Tolerance
Per ASTM A484 / A484M or as agreed
-
Straightness Tolerance
Per ASTM A484 / A484M or as agreed
-
End Condition
Square cut, saw cut, chamfered or as ordered
-
Surface Finish
Hot-finished and pickled, peeled, rough turned, cold-drawn, ground, polished
-
Cut-to-Length Availability
Available
-
Dimensional Standard
ASTM A484 / A484M
-
Dimensions & Sizes
Explore available diameters, lengths, and dimensional requirements for 253 MA Round Bar
Pricing for Stainless Steel 253MA Round Bar
Round Bar Prices are generally quoted per kilograms or meters tonnes and can fluctuate with the global raw material and market prices. The final price will depend on a variety of factors, including the grade size, diameter, length, surface finish, the quantity and whether the bars are cut to length or in standard lengths.
For smaller quantities, we can also quote per metre or per piece basis once the required dimensions have been confirmed. Container-loads or orders that are larger in size are typically priced per tonne, based upon the specifications required and the supply conditions.
Please provide your desired dimensions, grades, length number, and end for a current quote including the lead time applicable and details for certification.
Pricing
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Why Choose Us
Euro Steel Bars is an international distributor, stockist and exporter of stainless round steel bars that cover carbon, stainless alloy, special grades. We stock a variety of sizes and grades. We guarantee every order with mill test certificates as well as full quality-assurance documentation. Our name speaks to our roots: European-sourced materials that is backed by the certificates and rigor that buyers from Asia as well as the Gulf and Africa are looking for.
Each bar we deliver is accompanied by EN 10204 3.1 mill test certificates as well as complete documentation of quality, so what you receive corresponds to what’s written in the documents. We carry a selection of sizes and grades ready for transport, and cut length upon the request of customers, which results in quicker lead times, whether you’re ordering just a one-off spec or a complete project tonnage.
We operate an actual wholesale business that is that is supported with an internationally-operated supply chain therefore we are able to serve fabricators sourcing one grade the same way in the same way as an EPC contractor who is placing a large order. Our clients include manufacturers, fabricators EPC construction companies, engineers oil and gas projects as well as construction companies. we design our inventory as well as documentation to show what buyers need to bring projects forward.
Our customers trust us across Qatar, Oman, Bahrain, Kuwait, Jordan, Malaysia, Singapore, Thailand, Taiwan, Turkey, Italy and South Africa. If you’re looking to source an Gulf energy project, or a construction project within Southeast Asia, you get the same quality of certified material, the exact documentation, and the exact delivery procedure.
Frequently Asked Questions
What is 253MA Round Bar?
What standard does 253MA Round Bar comply with?
How does 253MA compare with 310S?
What role does cerium play in 253MA?
What is the maximum service temperature of 253MA?
What are the key mechanical properties of 253MA?
Can 253MA Round Bar be welded?
What sizes and finishes are available?
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