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SMO 254 round bars are high-alloy austenitic stainless steel bars known for strength, corrosion resistance, and weldability. These bars handle extreme environments, especially with chlorides and acids. Preston Pipes & Alloys is a leading SMO 254 round bar supplier offering premium-quality bars for demanding applications. These include chemical processing, marine and offshore equipment, oil and gas systems, desalination plants, heat exchangers, pollution control setups, and pharmaceutical machinery. SMO 254 bars stand out for their pitting resistance and durability under high pressure and temperature.
SMO 254 round bars contain elements like carbon, chromium, manganese, molybdenum, nickel, nitrogen, phosphorus, silicon, and sulphur. These bars can withstand corrosion and cracking in extreme conditions due to their well-balanced composition. The mechanical strength is outstanding with a minimum proof stress of 300 N/mm² and tensile strength of 650 N/mm². These bars provide up to 35% elongation, a hardness value less than 270 HBN, and 50% reduction in cross-section area. SMO 254 is also equivalent to similar grades such as UNS S31254, WNR 1.4547, and EN X1CrNiMoCuN20-18-7 and is hence a reliable option for all industries.
SMO 254 bars are available in a wide range of specifications. Sizes range from 1/2" to 100" and lengths from 100 mm to 6000 mm. Manufacturing meets global standards such as EN, DIN, JIS, ASTM, BS, ASME, and AISI. Bars are available in forms like round, square, hex, rectangular, billet, ingot, forging, wire, and wire mesh. Common finishes include bright, polished, and black. SMO 254 bar production uses standards like ASTM A276, A279, and A479 to ensure consistent quality and reliable performance.
Before being shipped, each SMO 254 round bar undergoes rigorous quality inspections and mechanical testing. These consist of dimensional inspection, PMI testing, hardness inspections, and ultrasonic testing. To prevent damage during transportation, bars are packaged in wooden crates or bundles and properly labeled. Clear packaging requirements are followed on each batch to ensure seamless transportation at different locations. For reliable supply and fast delivery, count on a trusted SMO 254 round bar stockist.
| Specifications | ASTM A276 / ASTM SA276 |
| Dimensions | EN, DIN, JIS, ASTM, BS, ASME |
| Size | 5 mm To 500 mm |
| Diameter | 0.1 mm to 100 mm |
| Length | 100 mm To 3000 mm Long & Above |
| Finish | Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish |
| Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
| Form | Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging Etc. |
SMO 254 Hex Bar
SMO 254 Bright Bar
SMO 254 Cold Rolled Bar
SMO 254 Flat Bar
SMO 254 Square Bar
SMO 254 Rectangular Bar
SMO 254 Polished Round Bar
SMO 254 Hollow Bar
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quotation of SMO 254 Round Bar
| Grade | C | Mn | Si | S | Cu | Ni | Cr | N | Mo | P |
| SMO 254 | 0.02 max | 1 max | 0.8 max | 0.01 max | 0.5 – 1 | 17.5 – 18.5 | 19.5 – 20.5 | 0.18 – 0.22 | 6 – 6.5 | 0.03 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
| 8.0 g/cm³ | 1320–1390 °C | 650 | 300 | 35 % |
| STANDARD | WERKSTOFF NR. | UNS | JIS | SIS | GOST | AFNOR | EN |
| SMO 254 | 1.4547 | S31254 | - | 2378 | - | Z1 CNDU 20.18.06Az | X1CrNiMoCuN20-18-7 |
| Diameter | Weight Chart | Dia | Weight Chart |
| (mm) | per metre (kg) | (in) | per metre (kg) |
| 3mm | 0.06 | 1/8" | 0.06 |
| 4mm | 0.10 | 3/16" | 0.14 |
| 5mm | 0.16 | 1/4" | 0.25 |
| 6mm | 0.22 | 5/16" | 0.39 |
| 7mm | 0.30 | 3/8" | 0.56 |
| 8mm | 0.40 | 7/16" | 0.77 |
| 10mm | 0.62 | 1/2" | 1.00 |
| 12mm | 0.89 | 9/16" | 1.22 |
| 14mm | 1.22 | 5/8" | 1.56 |
| 15mm | 1.40 | 11/16" | 1.89 |
| 16mm | 1.59 | 3/4" | 2.25 |
| 18mm | 2.01 | 7/8" | 3.07 |
| 20mm | 2.48 | 1" | 4.03 |
| 22mm | 3.00 | ||
| 24mm | 3.57 | ||
| 25mm | 3.88 |