Home > Duplex Steel > Duplex Steel S31803 Bolts
Aisha Nickel Alloys is a trusted manufacturer and supplier of Duplex Steel S31803 Bolts in Muscat, Oman, offering high-strength fastening solutions for demanding industrial environments. These bolts are manufactured using advanced forging and precision machining processes to ensure accurate dimensions, excellent surface finish, and reliable performance. Aisha Nickel Alloys follows strict international quality standards to deliver products that meet global specifications. With efficient supply, timely delivery, and customer-focused service, the company supports oil and gas, marine, chemical, and infrastructure industries worldwide.
|
Material |
Specification |
Standards |
Size
|
Length |
|
Duplex Steel S31803
|
IS
BS
ASTM
|
ASTM / ASME – A/ SA 479 / 479 |
3 mm
to
200 mm
|
M02 to M30
|
|
Grade |
Tensile Strength
(MPa) min |
Elongation
(% in 50mm) |
Yield Strength
0.2% Proof (MPa) min |
Hardness
Rockwell C (HR C) |
|---|---|---|---|---|
| Duplex Steel Bolts S31803 |
621 |
25 |
448 |
21 max |
Duplex Steel S31803 is a chromium-nickel-molybdenum alloy with a balanced austenitic and ferritic microstructure. It typically contains around 22% chromium, 5–6% nickel, 3% molybdenum, and nitrogen for added strength and corrosion resistance. This composition provides high tensile and yield strength, excellent toughness, and superior resistance to stress corrosion cracking. S31803 bolts offer good fatigue strength, impact resistance, and reliable performance under high pressure and fluctuating temperatures
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Duplex Steel S31803 bolts are widely used in applications requiring high mechanical strength and excellent corrosion resistance. They are commonly employed in oil and gas platforms, offshore structures, and marine equipment due to their resistance to chlorides and seawater corrosion. In chemical processing and petrochemical plants, these bolts are used for pressure vessels, pipelines, and heat exchangers. S31803 bolts are also suitable for desalination plants, power generation, construction projects, and industrial machinery, ensuring long service life and secure fastening in harsh environments.
