253 MA Round Bar | UNS S30815 | DIN 1.4835

Din 1.4835 Round Bar Exporter, 1.4835 Round Bar Distributor, ASTM A276 Round Bar Manufacturer, Grade 253 MA Round Bar Supplier, UNS S30815 Round Bar Stockist.

PM Industries manufactures, supplies, and stocks 253 MA Round Bar (UNS S30815). It's an austenitic stainless steel with a carefully balanced composition of chromium (20–22%), nickel (10–12%), silicon (1.4–2.0%), nitrogen (0.14–0.20%), and rare earth element additions, primarily cerium. That combination is what separates 253 MA from standard high-temperature stainless grades like 310. The rare earth additions significantly improve oxide scale adhesion during thermal cycling, while the nitrogen addition strengthens the austenite matrix at temperature. Silicon contributes further to oxidation resistance. Together those elements produce an alloy with better high-temperature performance per unit of nickel and chromium than 310 in many service conditions.

Grade 253 MA Round Bar, UNS S30815 Round Bar, 1.4835 Round Bar, ASTM A276 Round Bar.

253 MA was developed specifically to fill the performance gap between standard austenitic grades like 310 and more expensive nickel alloys like Incoloy 800H. It offers better oxidation resistance and creep strength than 310 at temperatures above approximately 900°C, at a lower alloy cost than the nickel-iron-chromium grades. For applications in the 900°C to 1100°C range where 310 reaches its practical limits but 800H is over-specified, 253 MA hits a practical and cost-effective balance.

Oxide scale adhesion during thermal cycling is where 253 MA consistently outperforms 310 and most other chromia-forming austenitic grades. In applications that cycle between ambient and operating temperature repeatedly, oxide scale spalling during cooling is a primary mechanism of surface degradation. Each spalling event exposes fresh metal that re-oxidizes on the next heating cycle, progressively consuming material. The cerium addition in 253 MA significantly reduces that spalling, which extends component surface life in batch heat treatment equipment, cyclic furnace applications, and other thermally dynamic service conditions.

Creep strength above 900°C is better than 310. For structural components, radiant tube supports, and furnace fixtures that carry mechanical load at the upper end of the austenitic stainless temperature range, 253 MA provides more reliable dimensional stability than 310 over long service intervals. That strength advantage becomes the deciding factor in applications where 310 has shown creep deformation or sag over extended service periods.

Silicon content, while lower than in some other heat-resistant grades, contributes meaningfully to oxidation resistance. It also makes 253 MA somewhat more prone to sigma phase formation over very long service periods above approximately 700°C, which is a consideration for components with exceptionally long service intervals. In most practical applications, that concern is manageable and doesn't affect service life adversely.

Bar is available in a range of diameters and surface finishes with full material certification to applicable specifications. Contact PM Industries for stock availability, dimensions, and pricing.

Specification 253 MA Round bar

Specification	ASTM, EN, DIN, JIS, BS, ASME, AISI
Condition	Hardened & tempered, annealed
Length	1 to 6 Meters, Custom Cut Lengths
Round Bars	Outside Diameter in the range of 4mm to 500mm above as per the customer requirement.
Bright Bars	Outside Diameter in the range of 4mm to 500mm above as per the customer requirement.
Hex Bars	18mm – 57mm (11/16″ to 2-3/4″) above as per the requirement.
Square Bars	18mm – 47mm (11/16″ to 1-3/4″) above as per the requirement.
Flat Bars	1/2” to 10” in thickness range of 2mm to 150mm
Finish	Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish
Technique	Hot Rolled, Cold Rolled, Cold Drawn, Forged Round Bar, Rod
Tolerance	H8, H9, H10, H11, H12, H13, K9, K10, K11, K12 or as per clients’ requirements
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
Raw Materials Certificate	100% Radiography Test Report
Inspection	Third Party Inspection Report, etc

Available Types

Chemical Composition of Stainless Steel 253MA Round Bar

Element	Composition (%)
Carbon	0.05 – 0.1
Silicon	1.1 – 2.0
Manganese	0.8 min
Nickel	10 – 12
Sulfur	0.14 – 0.2
Chromium	20 – 22

Physical Properties of Stainless Steel 253MA Round Bar

Property	Value
Density	7.8 g/cm³
Melting Point	1400 °C (2550 °F)

Mechanical Properties of 253MA Round Bar

Property	Value
Elongation (%)	40
Yield Strength	Psi – 45,000, MPa – 310
Tensile Strength	Psi – 87,000, MPa – 600

253 MA Round bar Round Bar Size

US Bar		Metric		Japanese		Canadian/ASTM
Diameter (Inch)	Size of Bar	Diameter (milimeter)	size of Bar	Diameter (milimeter)	size of Bar	Diameter (milimeter2)	size of Bar
0.375	#3	5.5	5.5	10	10	200	15M
0.25	#2	5	5	6	6	100	10M
0.625	#5	7	7	16	16	500	25M
0.5	#4	6	6	13	13	300	20M
0.875	#7	9	9	22	22	1000	35M
0.75	#6	8	8	19	19	700	30M
1.125	#9	11	11	29	29	2500	55M
1	#8	10	10	25	25	1500	45M
1.375	#11	14	14	35	35
1.25	#10	12	12	32	32
1.625	#13	18	18	41	41
1.5	#12	16	16	38	38
1.875	#15	22	22	48	48
1.75	#14	20	20	44	44
2.25	#18	28	28	57	57
2	#16	25	25	51	51
		36	36
		32	32
		44	44
		40	40
		50	50

Condition

ANN	Annealed
H&T	Hardened and tempered.
PH	Precipitation hardened.

Finish

Bright drawn	BD	Slit rolled edge	SRE
Cold drawn	CD	Polished	P
Peeled and turned	P&T	Rough turned/peeled	RT
Cold finished	CF	Hot rolled pickled and annealed	HRAP
Centreless ground	CG	Hot finished	HF
Smooth turned	ST	reeled and Peeled	PR

Available Stock of 253 MA Round bar

Grade 253 MA Annealed Round Bar	ASTM A276 Shafting Round Bar
ASTM A276 Normalized Round Bar	UNS S30815 Automotive Round Bar
UNS S30815 Quenched & Tempered Round Bar	1.4835 Aerospace Round Bar
1.4835 Solution Annealed Round Bar	Din 1.4835 Oil & Gas Round Bar
Din 1.4835 Hardened Round Bar	EN X9CrNiSiNCe21-11-2 Marine Round Bar
EN X9CrNiSiNCe21-11-2 Bright Round Bar	SS 2368 Medical Grade Round Bar
SS 2368 Polished Round Bar	Grade 253 MA Hot Rolled Round Bar
Grade 253 MA Mirror Finish Round Bar	ASTM A276 Cold Drawn Round Bar
ASTM A276 Pickled & Passivated Round Bar	UNS S30815 Cold Rolled Round Bar
UNS S30815 Coated / Plated Round Bar	1.4835 Forged Round Bar
1.4835 Commercial Round Bar	Din 1.4835 Peeled Round Bar
Din 1.4835 Precision Round Bar	EN X9CrNiSiNCe21-11-2 Turned Round Bar
EN X9CrNiSiNCe21-11-2 Straight Length Round Bar	SS 2368 Ground Round Bar
SS 2368 Cut-to-Length Round Bar	Grade 253 MA Centreless Ground Round Bar
Grade 253 MA Structural Round Bar	ASTM A276 Precision Ground Round Bar