Duplex Stainless Steel Fasteners Manufacturer in India, UNS S31803 Bolts, ASTM A479 UNS S31803 Bolts, Buy Duplex 2205 Bolts, Duplex Fasteners Manufacturers in India
Ratna Exports specializes in manufacturing and supplying ASTM A479 UNS S31803 Duplex Steel Bolts crafted from high-grade stainless steel. Duplex steel has gained popularity as a replacement for other steel types due to its exceptional mechanical properties, cost-effectiveness, and corrosion resistance. Our range includes various Duplex 2205 Fasteners such as bolts, nuts, washers, screws, and more, all meeting ASTM A182 and A479 standards.
These fasteners, graded as F51, adhere to dimensions outlined in standards like DIN 931, 912, and 975, among others, with configurations compliant with ASME B1.1 2A/3a. Duplex Stainless Steel Washers are designed to withstand high pressure, temperature, and wear, boasting excellent corrosion resistance properties. Our products can be cold forged, hot forged, or machined from bar stock, offering versatility in application.
Duplex Stainless Steel Bolts are available in sizes ranging from M6 to M100, with lengths spanning from 10mm to 1000mm. The material exhibits a melting point of 1350 ℃. It comprises carbon, manganese, silicon, phosphorus, sulfur, chromium, molybdenum, nickel, nitrogen, and iron. These bolts feature a minimum tensile strength of 800MPa and a minimum yield strength of 550MPa.
We offer various fasteners, including the Duplex 2205 Threaded Rod, facilitating connections between components without requiring two nuts. For further information on our products, such as Alloy 2205 Screws, and pricing details, please don’t hesitate to contact us. Ratna Exports is your trusted partner for high-quality duplex steel fasteners.
As one of the leading duplex fasteners manufacturers in India, we provide an extensive array of Duplex Steel 2205 Fasteners, including Bolts, Nuts, Washers, Screws, Threaded Rods, and more. Our range caters to diverse needs, with options available in various sizes, shapes, specifications, and thicknesses tailored to our clients’ requirements. These Duplex Steel Fasteners find widespread application across industries such as Oil and Gas, Construction, Offshore, and Onshore.
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Our Duplex Steel Fasteners are meticulously crafted to meet the highest quality standards, ensuring reliability and durability in demanding environments. Whether you need bolts for structural support, nuts for secure fastening, washers for distributing load, screws for precise fastening, or threaded rods for versatile connections, we have you covered.
With Ratna Exports, you can trust our commitment to delivering top-notch Duplex Steel Fasteners that meet your specific needs and exceed your expectations. Contact us today to discuss your requirements and explore our comprehensive range of products.
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Duplex Fasteners Specification
| Duplex Fasteners Material Specification | 2205 Duplex Bolts, UNS S31803 Bolts |
| Standard | DIN, UNI, ISO, JIS, GB, IS, BS, ASME, ANSI, ASTM, and all International Standards |
| Duplex Fasteners/ Bolts Size | M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30, M36 to M160 |
| Length | 3 mm to 200 mm |
| Duplex Bolts, Studs Threads: | METRIC, BSW, BSF, UNC, UNF, or as required |
| Duplex Steel Fasteners Standard: | ANSI – American National Standards Institute
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| SCOPE OF MANUFACTURE |
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| Duplex Fasteners in the form of: | Hex, Square, Round, Threading as per Gauge Etc. |
| Head drive: | Phillips, Slotted, Phillips/Slot, Six-Lobe, etc |
| Duplex bolting Test Certificate: | Manufacturer Test Certificate as per EN 10204 / 3.1 |
| Duplex Fasteners finishing: | Zinc (yellow, white, blue, black), black oxide, Geometry, Dacroment, anodizing, nickel-plated, plated zinc-nickel, Duplex Steel: Passivated Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Duplex Steel, Mechanically Applied coating, and some special ones like DACROMET |
| Production process | M2-M24: Cold Forging, hot forging M24-M100, machining, and CNC for Customised connecting element |
| Duplex bolting materials Surface Coating: |
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| Popular Types of Duplex Steel Bolts | Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Countersunk Bolts, etc. |
| Popular Types of Duplex Steel Nuts | Eye, Dome, Hex Head Nut, Panel, Lock, Coupling, Square, Acorn, T, Wing, etc. |
| Popular Types of Duplex Steel Screw | Socket Set Fasteners, Anchor Fasteners, Blind Rivet, Threaded Fasteners, Socket Head Fasteners, Machine Fasteners, Concrete Fasteners, Shoulder Fasteners, Panel Fasteners, Hex Head Cap Fasteners, etc. |
| Popular Types of Duplex Steel Washers | Machine Washers, Star Washers, Flat Washers, Lock Washers, Split Washers, Sealing Washers, etc. |
| Duplex Fasteners Packing: | IN BULK: canton, pallet, Small Boxes/carton/pallet, or customer request |
Equivalent Grades for Duplex Fasteners
| STANDARD | UNS | WNR. |
| Duplex 2205 | S31803 / S32205 | 1.4462 |
Duplex Fasteners Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| Duplex S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.5 – 3.5 | 4.50 – 6.50 | 0.18 – 0.20 | 63.72 min |
| Duplex S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.00 – 3.50 | 4.50 – 6.50 | 0.14 – 0.20 | 63.54 min |
| Duplex S32750 | 0.030 max | 1.20 max | 0.80 max | 0.035 max | 0.020 max | 24.00 – 26.00 | 3.00 – 5.00 | 6.00 – 8.00 | 0.24 – 0.32 | 58.095 min |
| Duplex S32760 | 0.03 max | 1.00 max | 1.00 max | 0.030 max | 0.010 max | 24.00 – 26.00 | 3.00 – 4.00 | 6.00 – 8.00 | 0.20 – 0.30 | 57.61 min |
Duplex Fastener Mechanical Properties
| Element | TENSILE STRENGTH ( MPA) Min. | 0.2 Per Yield Strength (MPA) Min. | Elongation (%) Min. | Hardness ( BHN) Max. |
| S31803 / S32205 | 620 | 448 | 25 | 290 |
| S32750 / S32760 | 800 | 550 | 15 | 310 |
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Dimensions Chart for Duplex Fasteners
| Bolt Size | USS | SAE | ||||
| OD (in.) | ID (in.) | Thickness | OD (in.) | ID (in.) | Thickness | |
| 1/8 (#6) | – | – | – | 0.375 | 0.156 | .036/.065 |
| 5/32 (#8) | – | – | – | 0.438 | 0.188 | .036/.065 |
| 3/16 (#10) | 0.560 | 0.250 | .036/.065 | 0.500 | 0.220 | .036/.065 |
| 7/32 (#12) | – | – | – | 0.562 | 0.250 | .051/.080 |
| 1/4 (#14) | 0.734 | 0.312 | .051/.080 | 0.625 | 0.281 | .051/.080 |
| 5/16 | 0.875 | 0.375 | .064/.104 | 0.688 | 0.344 | .051/.080 |
| 3/8 | 1.000 | 0.438 | .064/.104 | 0.812 | 0.406 | .051/.080 |
| 7/16 | 1.250 | 0.500 | .064/.104 | 0.922 | 0.469 | .051/.080 |
| 1/2 | 1.375 | 0.562 | .086/.132 | 1.062 | 0.531 | .074/.121 |
| 9/16 | 1.469 | 0.625 | .086/.132 | 1.156 | 0.594 | .074/.121 |
| 5/8 | 1.750 | 0.688 | .108/.160 | 1.312 | 0.656 | .074/.121 |
| 3/4 | 2.000 | 0.812 | .122/.177 | 1.469 | 0.812 | .108/.160 |
| 7/8 | 2.250 | 0.938 | .136/.192 | 1.750 | 0.938 | .108/.160 |
| 1 | 2.500 | 1.062 | .136/.192 | 2.000 | 1.062 | .108/.160 |
| 1 1/8 | 2.750 | 1.250 | .136/.192 | 2.250 | 1.250 | .108/.160 |
| 1 1/4 | 3.000 | 1.375 | .136/.192 | 2.500 | 1.375 | .136/.192 |
| 1 3/8 | 3.250 | 1.500 | .153/.213 | 2.750 | 1.500 | .136/.213 |
| 1 1/2 | 3.500 | 1.625 | .153/.213 | 3.000 | 1.625 | .153/.213 |
| 1 5/8 | 3.750 | 1.750 | .153/.213 | – | – | – |
| 1 3/4 | 4.000 | 1.875 | .153/.213 | – | – | – |
| 1 7/8 | 4.250 | 2.000 | .153/.213 | – | – | – |
| 2 | 4.500 | 2.125 | .153/.213 | – | – | – |
| 2 1/4 | 4.750 | 2.375 | .320/.248 | – | – | – |
| 2 1/2 | 5.000 | 2.625 | .210/.280 | – | – | – |
| 2 3/4 | 5.250 | 2.875 | .228/.410S | – | – | – |
| 3 | 5.500 | 3.125 | .249/.327 | – | – | – |
Please note this is an approx Duplex Fasteners price in India. For final Duplex Stainless Steel Fasteners price list please mail us.
Size Chart for Duplex Fasteners
| Fasteners Type | SIZE | GRADE | ASME | ISO | ASTM |
| Socket Head Cap Fasteners | M1.6 to M64 | 12.9 | B18.3.1 M | 4762 | A574M |
| Socket Low Head Cap Fasteners | M4 to M20 | 10.9 | |||
| Socket Head Shoulder Fasteners | M6 to M24 | 12.9 | B18.3.3M | ||
| Countersunk Socket Head Fasteners | M3 to M20 | 12.9 | B18.3.5M | 10642 | F835M |
| Button Head Socket Fasteners | M3 to M12 | 12.9 | B18.3.4M | 7380 | F835M |
| Flange Button Head Socket Fasteners | M3 to M10 | 12.9 | F835M | ||
| Knurled Point Socket Set Fasteners | M3 to M20 | 45H | B18.3.6M | 4029 | F912M |
| Flat Point Socket Set Fasteners | M6 to M12 | 45H | B18.3.6M | 4026 | F912M |
| Point Socket Set Fasteners | M3 to M20 | 45H | B18.3.6M | 4028 | F912M |
| Cone Point Socket Set Fasteners | M3 to M12 | 45H | B18.3.6M | 4027 | F912M |
| Plain Point Socket Set Fasteners | M3 to M20 | 45H | B18.3.6M | 4029 | F912M |
| Taper Pressure Plug | M8 to M22 | – |
| Duplex Nuts Type | SIZE | PROPERTY CLASS | STANDARD |
| Duplex Hex Nut | M6 to M42 | 10 | ISO 4032 |
| Duplex Nylock Nut | M6 to M20 (Gr.8) M10 to M24 (Gr.10) | 8 & `10 | DIN 982 |
| Duplex Nylock Nut | M6 to M20 (Gr.8) M10 to M24 (Gr.10) | 8 & 10 | DIN 985 |
| Duplex Hex Weld Nut | M6 to M12 | 8 | DIN 929 |
| Duplex Washers Type | SIZE | HARDNESS | STANDARD |
| Square Section Spring Washer, Duplex | 3mm to 39mm | HV (430 to 530) | DIN 7980 |
| Flat Section Spring Washer, Duplex | 3mm to 39mm | HV (430 to 530) | DIN 127 B |
| Hardened Washer, Duplex | 12mm to 30mm | HV (300 to 370) | IS 2016 |
| Hardened Steel Washer, Duplex | 12mm to 56mm | Rockwell 26 to 45 (HDG) Rockwell 38 to 45 (Coated) | ASTM F436M |
Applications Industry Duplex Fasteners
- Pharmaceutical Industry
- Oil Refineries
- Textile Industries
- Nuclear Plants
- Chemical Industries
- Power Plant
- Petrochemicals Industry
- Sugar Industry
- Engineering Industry
- Chemical Industry
- Food Industry
- Marine Industry