SMO 254 Round Bar

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SMO 254 Round Bar Specification

Tolerance
H9, H10, H11 as per requirement

Grade
254 SMO

Material
SMO 254 (UNS S31254)

Standard
ASTM A276, ASTM A479, EN 1.4547

Technique
Hot Rolled / Cold Drawn

Type
Round Bar

Diameter
6 mm to 350 mm

Length
100 mm to 6000 mm (custom cut available)

Specific Use
High chloride environments, Heat exchangers, Process piping

Processing
Forged, Peeled, Turned, Polished

Application
Chemical processing, Marine equipment, Oil & Gas, Pulp & Paper, Desalination plants

Finish
Bright, Polished, Black, Peeled

About SMO 254 Round Bar

What Are Specification SMO 254 Round Bar?

Dimensions	DIN, EN, ASTM, JIS, ASME, BS, AISI
Hex Bar Size	2-100mm A/F
Round Bar Size	Diameter: 3-~800mm
Flat Bar Size	Thickness: 2 -100mm
Flat Bar Size	Width: 10 to 500mm
Angle Bar Size	3mm20mm20mm~12mm100mm100mm
Square Bar Size	4 to 100mm
Channel Bar	80 x 40mm to 150 x 90mm section; 5.0 to 6.0mm thickness
Rectangular Bars Section	3.0 to 12.0mm thickness
Threaded Bar Billet Size	1/2 to 495mm Diameter
Rectangles Size	33 x 30mm to 295 x 1066mm
Hollow Bar	32mm OD x 16mm ID to 250mm OD x 200mm ID)
Tolerance	H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients requirements
Finish	Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black
Surface	Hot Rolled Pickled, Bright, Sand Blasting Finished, Cold Drawn, Hairline,Polished
Condition	Hardened & tempered, annealed
Technique	Cold Drawn, Hot Rolled, Forged Round Bar,Cold Rolled, Rod
Processing	Bar cutting to 650mm
Form	Rod, Round, Channel Bar, T-Bar, Flat Bar, Precision Ground Bar, Blocks, Square, Rings, Round Rod, Triangle, Hollow, Rectangle, Threaded, Hex (A/F), Profiles, Half Round Bar, Ingot, Billet, I/H Bar, Forging etc.

Equivalent material Of SMO 254 Round Bar?

STANDARD	WERKSTOFF NR.	UNS	SIS	AFNOR	EN
SMO 254	1.4547	S31254	2378	Z1 CNDU 20.18.06Az	X1CrNiMoCuN20-18-7

Chemical Composition Of SMO 254 Round Bar?

Grade	C	Mn	Si	P	S	Cr	Mo	Ni	Ti
SMO 254	0.2 max	1.5 max	0.75 max	0.040	0.030 max	18.00 22.00	-	0.50 max

Mechanical Properties Of SMO 254 Round Bar?

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.0 g/cm3	1320-1390	650	300	35 %

Robust Mechanical and Corrosion Properties

SMO 254 Round Bars are engineered to deliver high tensile ( 650 MPa) and yield strength ( 300 MPa), along with excellent elongation ( 35%). Their exceptional resistance to pitting, crevice, and stress corrosion cracking makes them the preferred material in aggressive chloride environments. The solution-annealed microstructure ensures durability, while controlled hardness ( 100 HB) enhances machinability and formability.

Versatile Applications Across Industries

This grade is widely trusted in sectors such as chemical processing, marine engineering, oil & gas industries, pulp & paper, and desalination plants. Its robust attributes and adaptability make it suitable for heat exchangers, high-stress process piping, and other systems exposed to harsh chemical and saltwater conditions.

Customization and Export-Ready Packaging

Offered in diameters ranging from 6 mm to 350 mm and lengths up to 6000 mm, SMO 254 Round Bars can be custom cut to precise requirements. Available finishes include bright, polished, black, peeled, and turned. Every bar is export-packaged in standard seaworthy wooden boxes or bundles, ensuring quality is preserved during global transit.

FAQs of SMO 254 Round Bar:

Q: How is the SMO 254 Round Bar processed and finished before delivery?

A: SMO 254 Round Bars are manufactured through hot rolling or cold drawing, followed by processes such as forging, peeling, turning, and polishing. The bars are solution-annealed to enhance their mechanical and corrosion-resistant properties. Customers can choose from a variety of finishes, including bright, polished, black, or peeled, to suit specific application requirements.

Q: What benefits does SMO 254 Round Bar offer in high chloride environments?

A: Thanks to its superior alloy composition, SMO 254 offers excellent resistance to pitting, crevice, and stress corrosion cracking, even in high chloride settings. This makes the round bar ideal for marine equipment, desalination plants, and chemical processing systems exposed to saltwater or aggressive chemicals.

Q: When should I use SMO 254 Round Bar over standard stainless steels?

A: SMO 254 Round Bar should be chosen for applications demanding high corrosion resistance and mechanical strength, especially where exposure to chlorides or aggressive media is significant, such as in seawater systems, pulp & paper, or oil & gas process piping.

Q: Where can SMO 254 Round Bars be used most effectively?

A: These bars are best utilized in industries like marine engineering, chemical processing, oil & gas, pulp & paper, and desalination plants. Their resistance to localized corrosion makes them especially effective in heat exchangers, pumps, and piping subjected to corrosive environments.

Q: What standards do SMO 254 Round Bars comply with?

A: SMO 254 Round Bars are produced in accordance with international standards such as ASTM A276, ASTM A479, and EN 1.4547. Compliance ensures consistent material quality and suitability for critical industrial applications.

Q: How are SMO 254 Round Bars packaged for export?

A: For safe international shipping, these round bars are packed in standard seaworthy wooden boxes or bundled, protecting them from mechanical damage and environmental exposure during transit.

Q: What are the available size and tolerance options for SMO 254 Round Bars?

A: Diameters range from 6 mm to 350 mm with custom lengths up to 6000 mm. Tolerances such as H9, H10, and H11 are offered as per customer specification, ensuring precise compatibility for diverse engineering needs.

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