Product Description
Technical Identifiers and Standards
| Field | Designation / Specification |
| Common Alloy Names | SMO 254, 254 SMO, Alloy 254, UNS S31254, F44, 6 Moly |
| UNS Number | S31254 |
| Werkstoff Number | 1.4547 |
| EN Short Designation | X1CrNiMoCuN20-18-7 |
| ASTM Standards | ASTM A240 (Plate/Sheet), ASTM A276 (Bar), ASTM A312 (Pipe), ASTM A479, ASTM A182 (Grade F44) |
| ASME Specifications | SA-240, SA-276, SA-312, SA-182 (Grade F44) |
| NACE Standard | NACE MR0175 / ISO 15156 |
| Alloy Family | 6-Moly Super Austenitic Stainless Steel |
Scrap Classification and Value Drivers
-
High Molybdenum Premium: Intrinsic melt value is heavily driven by elevated Molybdenum (6.00 to 6.50 percent) combined with 17.50 to 18.50 percent Nickel and 0.50 to 1.00 percent Copper.
-
High PREN Rating Value: Offers exceptional resistance to chloride pitting and crevice corrosion with a PREN index exceeding 42, making uncontaminated scrap highly desirable for high-purity remelting.
-
Ultra-Low Carbon Standard: Features a maximum carbon limit of 0.020 percent, requiring clean, un-carburized scrap to maintain intergranular corrosion resistance in re-melt heats.
-
Strict Grade Segregation: Must be kept completely isolated from AL-6XN, 904L, 316L, 317L, Sanicro 28, and Duplex/Super Duplex alloys (such as 2205 or 2507).
-
Magnetic Response: Completely non-magnetic in the annealed condition; maintains very low magnetic permeability even after cold work.
-
Cleanliness Requirements: Scrap should be free of carbon steel attachments, braze residues, heavy scale, grease, and chemical deposits.
Common Scrap Forms and Sources
-
Solid Scrap: Flange drops, process pipe remnants, plate offcuts, sheet trimmings, seamless and welded tubing cut-offs, valve body drop-offs, fittings, and bar ends.
-
Turnings / Borings: Machining chips, turnings, and millings from valve and fitting production (requires thorough degreasing and magnetic screening for tramp iron).
-
Industrial Origin: Pulp and paper bleaching equipment, seawater desalination plants, offshore oil and gas production platforms, flue gas desulfurization (FGD) scrubbers, and chemical processing plants.
Outstanding Corrosion Resistance for Extreme EnvironmentsSMO 254 Scrap is engineered for superior resistance to seawater, chlorides, and harsh chemical environments, making it perfect for demanding applications in marine, offshore, and process industries. The high quantities of molybdenum and nitrogen enhance durability, guaranteeing minimal material degradation even under aggressive exposure.
Versatility in Recycling and Alloy RecoveryDue to its excellent chemical composition and purity, SMO 254 Scrap is highly valued in the recycling industry. The material is ideal for melting and alloy recovery processes, ensuring critical elements are recaptured efficiently for use in new high-performance applications.
Custom Sizing and Reliable Supply ChainSupplied by trusted dealers, exporters, and producers across India, SMO 254 Scrap can be sourced in various thicknesses, diameters (usually 150-350 mm), and lengths according to project requirements. This flexibility, paired with rigorous quality control, ensures customers receive scrap tailored to their needs.
FAQ's of SMO 254 Scrap:
Q: How can SMO 254 Scrap be used in industrial applications?
A: SMO 254 Scrap is primarily used for melting, recycling, and alloy recovery due to its high purity and corrosion-resistant properties. It is well suited for manufacturing new steel products that require excellent durability, especially in harsh chemical and marine environments.
Q: What makes SMO 254 Scrap suitable for seawater and chloride-rich conditions?
A: The high molybdenum and nitrogen content in SMO 254 (UNS S31254) provides extraordinary resistance to pitting and crevice corrosion caused by chlorides, making it an ideal choice for seawater and other highly corrosive environments.
Q: When should I consider using SMO 254 Scrap over other stainless steel scrap types?
A: Select SMO 254 Scrap when your application demands a combination of high corrosion resistance, high tensile strength, and the need for alloying elements such as molybdenum and nitrogen, particularly in challenging marine or chemical processing settings.
Q: Where is SMO 254 Scrap typically sourced from in India?
A: SMO 254 Scrap is available from reputed Indian dealers, exporters, manufacturers, suppliers, and traders. These sources specialize in super austenitic stainless steel scrap, ensuring dependable quality and compliance with industry standards.
Q: What is the process for recycling SMO 254 Scrap?
A: Recycling involves collecting, sorting, cleaning (to remove surface oxidation and paint), and melting the SMO 254 Scrap. During melting, its valuable alloy components are recovered and reused in the production of high-performance stainless steel products.
Q: How does the condition and surface of the scrap affect its usability?
A: Although SMO 254 Scrap may show surface oxidation and paint markings due to previous use, its high intrinsic purity ensures these do not significantly impact its recyclability or performance in new alloy applications.
Q: What are the benefits of choosing high-purity SMO 254 Scrap?
A: High-purity SMO 254 Scrap offers reliable chemical composition, minimizing contamination risks in melting and refining operations. This ensures superior quality and performance in the resulting alloys or steel products.