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Explore the Robust World of S31803 Duplex Steel
Unmatched Composition and Exceptional Structure Discover the strength and resilience of S31803 Duplex Steel, a nitrogen-enhanced stainless steel alloy with a remarkable fusion of 21% chromium, 2.5% molybdenum, 4.5% nickel, and beneficial nitrogen. Engineered for superior performance, S31803 stands out with its unique blend of elements, ensuring unmatched strength and extraordinary corrosion resistance.
Superior Physical and Mechanical Properties
- Density: Experience the robustness with a density of 8.0 g/cm³, perfectly balanced to offer high strength and enduring quality without the bulk.
- Tensile Strength: With a formidable tensile strength of ≥ 620 MPa, S31803 is built to withstand extreme conditions without succumbing to stress.
- Yield Strength: At a yield strength of ≥ 450 MPa, it excels in maintaining integrity under pressure, highlighting its durability and reliability.
- Elongation Rate: A minimum of 25% elongation rate denotes its exceptional ductility, enabling it to endure varied industrial applications without faltering.
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Key Performance Features
- High Strength: Achieve efficient, lightweight designs thanks to its double yield strength compared to standard austenitic steels.
- Cost-Effective: Gain a competitive advantage with this economically favorable alternative to traditional 316/317L stainless steel, offering superior performance without the premium price.
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Diverse Applications Across Industries
- Chemical Processing: Ideal for equipment exposed to harsh chemicals, ensuring longevity and resistance to corrosion.
- Marine Applications: From shipbuilding to offshore rigs, it offers unparalleled resistance to chloride and other corrosive elements found in marine environments.
- Infrastructure and Construction: Trusted in high-stress environments where strength, durability, and safety are paramount.
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Why Choose S31803 Duplex Steel? Embrace the future of materials technology with S31803 Duplex Steel, where high strength meets exceptional corrosion resistance. Perfect for industries facing harsh environments or in need of durable materials, S31803 is your go-to for reliability and cost-effectiveness.
Experience the power of advanced steel technology—choose S31803 Duplex Steel for your next project.
- Versatile Temperature Range: Optimal performance from -50 °F to +600 °F makes S31803 ideal for a myriad of applications, ensuring reliability across extreme environments.

1/2''-48''(Butt welding, seamless); 16''~110''(welding)

Our company can produce carbon steel, stainless steel, and alloy steel pipe fittings according to standards such as ASME/ANSI, JIS, DIN, ISO etc. The varieties include equal diameter tees, reducing tees, tees, elbows, cross, concentric reducer, eccentric reducer etc.
We provide the very best quality pipe and fittings, prompt delivery and reliable services at competitive prices.