Request For Our Latest Prices On Duplex Steel Nuts S31803 in Mumbai, India!
The Fasteners Mart based in Mumbai, India, is a trusted producer and supplier of Duplex Steel S31803 Nuts known for their added strength and corrosion resistance. These nuts are crafted to be tough in demanding situations such as marine, offshore, and chemical industries, where they face chloride stress and corrosive environments on a daily basis. By staying committed to accuracy, quality, and timely delivery, The Fasteners Mart offers assured, high-performance fastening solutions. Our Duplex Steel S31803 Nuts offer long-lasting strength and are therefore the most appropriate option for severe applications that require superior mechanical properties and resistance.
Duplex Steel S31803 Nuts consist of 22% chromium, 5–6% nickel, 3% molybdenum, and nitrogen in a balanced austenitic-ferritic microstructure. In this composition, they offer high resistance to pitting, crevice corrosion, and stress corrosion cracking, especially under conditions with high concentrations of chlorides.S31803 nuts are mechanically strong at approximately 450 MPa and tensile at 620–850 MPa. They exhibit excellent fatigue life, impact toughness, and have excellent weldability. They are well suited because of these characteristics to be used in corrosive atmospheres, offshore high stresses of marine, and chemical usage.
| S31803 | Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi – 80000 , MPa – 550 | Psi – 116000 , MPa – 800 | 15 % |
| S31803 | C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 – 3.5 | 22.0 – 23.0 | 0.03 | 4.5 – 6.5 | 0.14 – 0.2 | Bal |
| Specifications | ASTM A479 / ASME SA479 |
| Standards | DIN, ASTM, BS and all International Standards |
| Length | 3 mm to 200 mm |
| Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | Hex Head Bolts, Square Bolts, U bolts, Eyebolts, T bolt, Hex Bolt, Lag Bolts, Countersunk Bolts, Hex Head nuts, Square nuts, Locknuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
Duplex Steel S31803 Nuts find common uses in high strength and good corrosion resistance requirements, particularly for aggressive environments. The nuts are perfectly applicable in offshore oil rigs, marine installations, chemical industries, and desalination plants where chloride stress corrosion resistance is required. They are also used in heat exchangers, pressure vessels, pipelines, and storage tanks under hostile chemicals or high-pressure conditions. Moreover, the S31803 nuts are also used in power plants, coastal area construction operations, and other industries that require safe fastening tools to deliver long-term performance and toughness in harsh conditions.
The Duplex Steel S31803 Nuts at The Fasteners Mart are rigorously tested, such as mechanical, chemical, and non-destructive testing, to comply with global quality standards. The nuts are separately inspected for strength, size, and surface condition. The nuts are well packed in wooden crates, corrugated boxes, or special packages for safe shipment to prevent damage, corrosion, and contamination. Protective wrapping and correct labeling see the fasteners delivered in prime condition for instant, reliable use in tough industrial environments.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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