Home > Super Duplex Steel > Super Duplex Steel Stud Bolts
Super Duplex Steel Stud Boltsare durable fasteners made from a specialized stainless steel alloy known for its exceptional strength and resistance to corrosion. Featuring dual-threaded ends, they perform outstandingly when holding components together in demanding settings like offshore rigs and chemical processing plants. These bolts deliver dependable fastening for critical uses where standard fasteners would give way to corrosion, safeguarding structural integrity and safety. Their strong durability and ability to withstand severe conditions make them essential for industries that demand unwavering reliability and long service life.
| Specification | ASTM F593, F594, F1554 / ASME SF593, F594, F1554 |
| Standard | DIN : DIN 934, DIN 931, DIN 970, DIN 933 UTS : UNEF, NPT, UNC, UNS, UNF, NPTF ISO : JIS standards, ISO 4033, ISO 4032, ANSI – American National Standards Institute ASME B18.5 ANSI B 28.2.4 1M as per defined in ASME B16.5 standard Monel Monel® Alloy 400 Stud nuts length ANSI B 18.2.4 2M as per defined in ASME B18.2.2 Monel Alloy 400 Hex nuts |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Length | 3 mm to 200 mm | Custom Sizes |
| Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
| Form | Hex, Threading, Square, Round as per Gauge Etc. |
| Threads | Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically |
| Threads available | UNF, BSW, BSF, METRIC, UNC, or as required |
| Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
| Certification | Dual Certified As per ASTM & ASME Codes |
| Test Certificate | As per EN 10204 / 3.1 Manufacturer Test Certificate, PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
| Raw materials Source | JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc. |
| Packing | IN BULK: canton, pallet, Small Boxs / carton / pallet, or customer request |
| Surface Coating | Cadmium Coating Hot Dipped Galvanizing Coating Ptfe Coated Nickel Alloy 200 Fasteners Phosphate Coating Teflon Coating Xylon Coating Zinc Coating |
| Grade | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| Super Duplex Steel Stud Bolts | 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
| Grade | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| Super Duplex Steel Stud Bolts | 0.030 max | 0.24 – 0.32 | 0.035 max | 0.80 max | 1.20 ma | 3.0 – 5.0 | – | 24.0 – 26.0 | 0.020 max | 6.00 – 8.00 |
At Koasteel, we take pride in being the largest supplier and manufacturer in the New Zealand, delivering innovative solutions for all your piping requirements. With advanced production facilities strategically positioned in the New Zealand, we maintain an extensive inventory of more than 25,000 tons of top-quality materials ready and available in stock.
Reach out to us for a fast quote tailored to your needs.
We supply these Super Duplex Steel Stud Bolts in accordance with DIN, ISO, JIS or ANSI Standard.
Corrosion Resistance: Super Duplex steel offers greater corrosion resistance than ordinary duplex stainless steel. As a result, it works well in demanding settings like marine, coastal and medical facilities where corrosion poses a serious problem.
High Strength: Super Duplex steel stud bolts deliver better tensile and yield strength than conventional duplex stainless steel or austenitic steel. This enables them to handle greater loads and stresses, making them well suited for critical uses where strength is essential.
Durability: Pairing high strength with corrosion resistance guarantees the durability and longevity of Super Duplex steel stud bolts, cutting down on the need for regular replacement and upkeep
Cost: Although the upfront cost of super duplex steel stud bolts may exceed that of certain other materials, their longer lifespan and lower maintenance generally bring down the total cost over time vertical
Stress resistance to strain cracking: Super Duplex steel shows outstanding resistance to corrosive stress cracking, a failure that can arise in materials under tensile stress within corrosion zones. This characteristic is especially valuable when applying materials in chloride-containing environments.
Super Duplex Steel Stud Bolts have applications as varied as the industries they serve, driven mainly by the aerospace, railway, construction and automotive industries along with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.
Marine Applications: Super duplex steel stud bolts are extensively employed on offshore oil and gas platforms, subsea pipelines and ships thanks to their outstanding corrosion resistance in harsh marine settings, including bodies of water, salt-dispersed and chloride-rich conditions.
Chemical and petrochemical industries: Applied in chemical plants, refineries and petrochemical facilities where contact with volatile chemicals and elevated temperatures is frequent. Super Duplex steel stud bolts deliver effective resistance to pitting, crevice corrosion and stress corrosion cracking in these demanding areas
Power generation: Power plants rely on seawater primarily for cooling; super duplex steel stud bolts serve to fasten crucial components such as valves, flanges, pumps, and more. Their corrosion resistance combined with high strength makes them well suited for both conventional and renewable energy applications.
Desalination equipment: Super duplex steel stud bolts are the preferred choice in desalination plants where seawater is processed to produce fresh water. These screws withstand salting at the edges caused by the high salinity of seawater, guaranteeing the reliability and longevity of equipment and structures.
Understand application requirements: Identify the precise circumstances under which the stud bolt will operate. Take into account temperature, pressure, possible dissipation, and mechanical load.
Material Selection: Super Duplex Stainless Steel is recognized for its outstanding corrosion resistance and mechanical characteristics when compared to standard duplex or austenitic stainless steel. This verifies. Verify that Super Duplex Steel meets your operational requirements.
Grade Selection: Super duplex stainless steels come in several grades, including UNS S32750 (often called 2507) and UNS S32760. Each class has slightly differing chemical composition and mechanical properties. Select the grade that most closely fits your application needs.
Size and Length: Establish the suitable size and length of stud bolts according to your application requirements, including the thickness of the fasteners and the necessary thread compatibility
Corrosion Resistance: Super Duplex Stainless Steel offers very high corrosion resistance, particularly in harsh settings that contain chloride ions. Ensure that the stud bolts deliver sufficient corrosion resistance for your particular application.
Yes, Super Duplex Steel Stud Bolts can be recycled. Stainless steel, super duplex stainless steel included, is a material that lends itself well to recycling. During recycling, the steel is melted down so it can be repurposed for a range of applications. Recycling stainless steel supports the conservation of natural resources, cuts down on energy use, and reduces waste.
Yes, Super Duplex Steel stud bolts are suitable for underground use, especially in settings where resistance to corrosion and mechanical strength are essential considerations. Super Duplex Steel is recognized for its outstanding corrosion resistance, particularly in harsh conditions like those encountered underground, where it may come into contact with moisture, soil, and other corrosive materials. Its high strength along with its resistance to pitting and crevice corrosion make it a fitting option for these applications. Nonetheless, correct engineering and installation methods must always be observed to guarantee the durability and performance of any material deployed underground.
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