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Welcome to GIC Fasteners, a trusted name in the manufacturing of premium Duplex Steel S31803 Nuts. As a leading producer of fasteners, we specialize in crafting nuts that adhere to stringent international standards including DIN, ASTM, ISO, and BS specifications. Our Duplex Steel S31803 Nuts combine superior corrosion resistance and exceptional mechanical properties, making them ideal for a wide array of industrial applications. With a commitment to quality and precision, we take pride in providing fasteners that meet and exceed equivalent international standards, ensuring reliability and durability for diverse engineering needs.
When it comes to high-performance fasteners in demanding industrial applications, GIC Fasteners stands out as a trusted name in the industry. Our Duplex Steel S31803 Nuts are a testament to our commitment to quality and precision. These nuts are crafted from Duplex Steel S31803, a corrosion-resistant and exceptionally durable material that ensures long-lasting performance in harsh environments.
At GIC Fasteners, we understand the critical role that nuts play in various industries, from oil and gas to marine and construction. Our Duplex Steel S31803 Nuts are designed to meet the highest standards, offering exceptional resistance to corrosion, high temperatures, and mechanical stress. Whether you need them for offshore drilling rigs, chemical processing plants, or structural applications, our nuts deliver the reliability and durability you can trust. For inquiries and to place your order, contact our expert team at sales@gicfasteners.com today, and experience the quality and service that sets GIC Fasteners apart in the fastener industry.
| Specifications | : | ASTM A479 / ASME SA479 |
| Standard | : | DIN, ISO, ASTM, JIS, BS, GB, IS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts, etc. |
| Grade | C% | Mn% | Si% | P% | S% | Cr% | Ni% | Mo% | N% |
|---|---|---|---|---|---|---|---|---|---|
| S31803 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
| Tensile Strength, ksi | 90 min |
|---|---|
| 0.2% Yield Strength, ksi | 65 min |
| Elongation, % | 25 min |
| Hardness [HRC] | 293 max |
| STANDARD | UNS | WNR. |
|---|---|---|
| Duplex Steel 1803 | S31803 | 1.4462 |
All measurements in millimeters
Nominal Size or Basic Major Thread Diameter |
F |
G |
H |
||||||
Width Across Flats |
Width Across Corners |
Thickness |
|||||||
Basic |
Max |
Min |
Max |
Min |
Basic |
Max |
Min |
||
1/4 |
.2500 |
1/2 |
.500 |
.488 |
.577 |
.556 |
15/64 |
.250 |
.218 |
5/16 |
.3125 |
9/16 |
.562 |
.546 |
.650 |
.622 |
19/64 |
.314 |
.280 |
3/8 |
.3750 |
11/16 |
.688 |
.669 |
.794 |
.763 |
23/64 |
.377 |
.341 |
7/16 |
.4375 |
3/4 |
.750 |
.728 |
.866 |
.830 |
27/64 |
.441 |
.403 |
1/2 |
.5000 |
7/8 |
.875 |
.850 |
1.010 |
.969 |
31/64 |
.504 |
.464 |
9/16 |
.5625 |
15/16 |
.938 |
.909 |
1.083 |
1.037 |
35/64 |
.568 |
.526 |
5/8 |
.6250 |
1-1/16 |
1.062 |
1.031 |
1.227 |
1.175 |
39/64 |
.631 |
.587 |
3/4 |
.7500 |
1-1/4 |
1.250 |
1.212 |
1.443 |
1.382 |
47/64 |
.758 |
.710 |
7/8 |
.8750 |
1-7/16 |
1.438 |
1.394 |
1.660 |
1.589 |
55/64 |
.885 |
.833 |
1 |
1.0000 |
1-5/8 |
1.325 |
1.575 |
1.876 |
1.796 |
63/64 |
1.012 |
.956 |
1-1/8 |
1.1250 |
1-13/16 |
1.812 |
1.756 |
2.093 |
2.002 |
1-7/64 |
1.139 |
1.079 |
1-1/4 |
1.2500 |
2 |
2.000 |
1.938 |
2.309 |
2.209 |
1-7/32 |
1.251 |
1.187 |
1-3/8 |
1.3750 |
2-3/16 |
2.188 |
2.119 |
2.526 |
2.416 |
1-11/32 |
1.378 |
1.460 |
1-1/2 |
1.5000 |
2-3/8 |
2.375 |
2.300 |
2.742 |
2.622 |
1-15/32 |
1.505 |
1.433 |
1-5/8 |
1.6250 |
2-9/16 |
2.562 |
2.481 |
2.959 |
2.828 |
1-19/32 |
1.632 |
1.556 |
1-3/4 |
1.7500 |
2-3/4 |
2.750 |
2.662 |
3.175 |
3.035 |
1-23/32 |
1.759 |
1.679 |
2 |
2.0000 |
3-1/8 |
3.125 |
3.025 |
3.608 |
3.449 |
1-31/32 |
2.013 |
1.925 |
2-1/4 |
2.2500 |
3-1/2 |
3.500 |
3.388 |
4.041 |
3.862 |
2-13/64 |
2.251 |
2.155 |
2-1/2 |
2.5000 |
3-7/8 |
3.875 |
3.750 |
4.474 |
4.275 |
2-29/64 |
2.505 |
2.401 |
2-3/4 |
2.7500 |
4-1/4 |
4.250 |
4.112 |
4.907 |
4.688 |
2-45/64 |
2.759 |
2.647 |
3 |
3.0000 |
4-5/8 |
4.625 |
4.475 |
5.340 |
5.102 |
2-61/64 |
3.013 |
2.893 |
3-1/4 |
3.2500 |
5 |
5.000 |
4.838 |
5.774 |
5.515 |
3-3/16 |
3.252 |
3.124 |
3-1/2 |
3.5000 |
5-3/8 |
5.375 |
5.200 |
6.207 |
5.928 |
3-7/16 |
3.506 |
3.370 |
3-3/4 |
3.7500 |
5-3/4 |
5.750 |
5.562 |
6.640 |
6.341 |
3-11/16 |
3.670 |
3.616 |
4 |
4.0000 |
6-1/8 |
6.125 |
5.925 |
7.073 |
6.755 |
3-15/16 |
4.014 |
3.862 |
| Applications | Industries |
|---|---|
| Pipelines and piping systems | Oil and Gas |
| Heat exchangers | Chemical and Petrochemical |
| Desalination equipment | Water Treatment |
| Pulp and paper processing | Pulp and Paper |
| Marine structures | Marine and Coastal |
| Pressure vessels | Energy |
| Chemical storage tanks | Chemical Processing |
| Food and beverage equipment | Food and Beverage |
| Architectural components | Construction |
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Duplex Steel S31803, also known as UNS S31803, is a type of duplex stainless steel characterized by its two-phase microstructure of austenitic and ferritic phases. It offers enhanced strength and corrosion resistance compared to conventional stainless steels.
Duplex Steel S31803 Nuts provide a unique combination of high strength, excellent corrosion resistance, and good weldability. These properties make them suitable for demanding applications in industries like oil and gas, chemical processing, and marine engineering.
Duplex Steel S31803 Nuts exhibit exceptional resistance to various forms of corrosion, including pitting, crevice corrosion, and stress corrosion cracking. This makes them an ideal choice for applications involving exposure to aggressive substances like chlorides.
Yes, Duplex Steel S31803 Nuts offer improved heat resistance and can maintain their mechanical properties at moderately elevated temperatures. This characteristic expands their usability in applications involving heat exchangers and certain industrial processes.
Duplex Steel S31803 Nuts find applications in a wide range of industries, including oil and gas, chemical and petrochemical, water treatment, pulp and paper, marine and coastal, energy, and construction.
Absolutely, Duplex Steel S31803 Nuts are highly suitable for marine and coastal applications due to their exceptional resistance to corrosion in chloride-rich environments, which are common near the sea.
Duplex Steel S31803 Nuts can be easily welded using conventional welding techniques like TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding. However, post-weld heat treatment might be necessary to maintain the desired properties.
Yes, Duplex Steel S31803 Nuts are often used in structural components due to their high strength, toughness, and corrosion resistance. They are suitable for architectural, construction, and pressure vessel applications.
Duplex Steel S31803 stands out for its duplex microstructure, which offers a balance of properties not typically found in single-phase austenitic or ferritic stainless steels. This gives it superior strength and corrosion resistance compared to many other stainless steel grades.
