Home > Duplex Steel > Duplex Steel S31803 Nuts
At Russ Nickel Alloys, we specialize in providing premium Duplex Steel S31803 nuts, renowned for their exceptional strength and corrosion resistance. As a leading manufacturer and distributor based in Manila, Philippines, we cater to various industries, including marine, chemical, and industrial sectors. Our Duplex Steel S31803 nuts are engineered to withstand extreme conditions, ensuring reliable performance and durability. With a commitment to quality and customer satisfaction, we offer a comprehensive range of products to meet your specific needs. Trust Russ Nickel Alloys for top-notch materials and unmatched service in the Philippines market.
|
Material
|
Specification
|
Standards |
Size
|
Length
|
|
Duplex Steel S31803 |
IS BS ASTM |
ASTM / ASME – A/ SA 479 / 479
|
3 mm |
M02 to M30 |
| Cr | N | Ni | C | Mn | Si | P | S | Mo | |
|---|---|---|---|---|---|---|---|---|---|
| S31803 | min: 21.0 max: 23.0 | min: 0.08 max: 0.20 | min: 4.5 max: 6.5 | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 2.5 max: 3.5 |
| S32205 | min: 22.0 max: 23.0 | min: 0.14 max: 0.20 | min: 4.5 max: 6.5 | 0.03 max | 2.0 max | 1.0 max | 0.03 max | 0.02 max | min: 3.0 max: 3.5 |
Grade | Tensile Strength (MPa) min | Elongation (% in 50mm) | Yield Strength 0.2% Proof (MPa) min | Hardness Rockwell C (HR C) |
|---|---|---|---|---|
UNS-S 31803 | 650-880 | 25 | 448 | |
UNS-S 32205 | 621 | 25 | 448 | 21 max |
These nuts are made from a nitrogen-enhanced duplex stainless steel alloy, which includes around 22% chromium, 5–6% nickel, 3% molybdenum, and nitrogen, resulting in a well-balanced ferrite-austenite microstructure. This unique composition offers high tensile and yield strength, excellent resistance to pitting, crevice, and stress corrosion cracking, along with good toughness and weldability. Even in elevated temperatures and harsh operating conditions, the nuts maintain their dimensional stability and mechanical integrity.
Contact us to get a quick quote for your requirement.
Duplex Steel S31803 Nuts find extensive use in chemical plants, desalination systems, oil & gas refineries, offshore platforms, and marine structures. They are particularly well-suited for securing flanges, valves, pumps, and pressure vessels, ensuring reliable performance in high-pressure, high-temperature, and corrosive environments. With their superior strength, corrosion resistance, and durability, Duplex Steel S31803 Nuts are the go-to choice for critical fastening applications in demanding industrial operations.
