SMO 254 is a high-alloy austenitic stainless steel that exhibits exceptional corrosion resistance, making it suitable for use in aggressive environments, such as those containing acids, chlorides, and seawater. SMO 254 fasteners are crucial components in various industries where corrosion resistance, high strength, and reliability are paramount.
The key attribute of SMO 254 is its resistance to chloride-induced stress corrosion cracking, which sets it apart from other stainless steels. This makes it highly desirable for applications in chemical processing, petrochemical, and offshore industries. SMO 254 fasteners are used in equipment such as pumps, valves, heat exchangers, and pipelines, where exposure to corrosive media is a constant challenge.
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One of the notable features of SMO 254 fasteners is their ability to withstand both crevice and pitting corrosion. This makes them ideal for use in environments where other stainless steels might fail due to localized corrosion. The alloy's high chromium, molybdenum, and nitrogen content contribute to its exceptional corrosion resistance properties.
SMO 254 fasteners come in various types, including bolts, nuts, screws, washers, and studs. These fasteners are available in different sizes and specifications to meet the diverse needs of industries requiring corrosion-resistant solutions. The fasteners are manufactured with precision to ensure high quality and performance in demanding applications.
Applications of SMO 254 fasteners extend to chemical processing plants, desalination facilities, pulp and paper industry, and offshore oil and gas platforms. The alloy's resistance to corrosion in acidic and chloride-rich environments makes it suitable for use in harsh conditions, where maintaining structural integrity and preventing corrosion-related failures are critical.
ASTM A193, A194 / ASME SB193, SB194
DIN, ISO ,JIS ,GB, IS, BS, ASTM and all International Standards
M3 - M100 | 3/6″ - 4″ | Custom Sizes
DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3
UNF, BSW, BSF, METRIC, UNC, or as required
ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads
Hex, Threading, Square, Round as per Gauge Etc.
Hex, Square, Round, Hex flange, Flat, T-head & Triangular etc.
| STANDARD | WERKSTOFF NR. | UNS | SIS | AFNOR | EN |
| SMO 254 | 1.4547 | S31254 | 2378 | Z1 CNDU 20.18.06Az | X1CrNiMoCuN20-18-7 |
| Grade | Ni | Cr | Mo | Cu | N | C | Mn | Si | P | S |
| SMO 254 | 17.5 – 18.5 | 19.5 – 20.5 | 6 – 6.5 | 0.5 – 1 | 0.18 – 0.22 | 0.02 max | 1 max | 0.8 max | 0.03 max | 0.01 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 8.0 g/cm3 | 1320-1390 ℃ | 650 | 300 | 35 % |
Oil & Gas Industrires
Chemical Industries
Construction Industries
Offshore Pipelines & Pipe Works
Petrochemical Industry
Shipbuilding Industries
Hydraulic Applications
Piping Systems
Refining Industry
Food Processing Industry
Pulp & Paper Industry
Power Plant Industry
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