Stainless steel plays a crucial role in various industries applications, offering exceptional strength, durability, and corrosion resistance. With availability of various grades, UNS S31803 Duplex Stainless Steel is known for its superior performance in demanding applications.
Here, in this blog we will discuss UNS S31803 material, highlighting its key properties, applications.
Understanding UNS S31803 Material
UNS S31803 Duplex Stainless Steel also known as Duplex 2205, is a high-performance alloy widely used across industries for its exceptional strength, durability, and corrosion resistance. With a balanced microstructure of austenite and ferrite, it provides superior mechanical properties, making it a preferred choice for chemicals, seawater, and extreme temperatures applications.
UNS S31803 Duplex Steel Supplier – Kalpataru Piping Solutions
Kalpataru Piping Solutions is a trusted supplier of UNS S31803 Duplex Steel, a chromium-nickel-molybdenum austenitic-ferritic grade known for its high strength, corrosion resistance, and durability. This type of duplex stainless steel offers superior resistance to stress corrosion cracking, pitting, and crevice corrosion.
Our Duplex UNS S31803 Products
We offer a wide range of UNS S31803 products to meet industrial requirements:
Key Features of UNS S31803
Corrosion Resistance of Duplex UNS S31803
Duplex stainless steel UNS S31803 offers excellent corrosion resistance, compared with austenitic stainless steel grades like 316. The duplex S31803 material resists intergranular corrosion, stress corrosion cracking, and pitting corrosion better than 304 and 316 stainless steels. Its superior corrosion resistance makes duplex steel UNS S31803 ideal for marine, chemical, and oil & gas applications.
Welding of Duplex S31803 Material
Duplex UNS S31803 material has good weldability. The low thermal expansion reduces residual stresses after welding. Using duplex welding electrodes that match the duplex SS UNS S31803 base metal ensures strong and durable welds. Electric arc welding methods are recommended, but oxyacetylene welding should be avoided to prevent carbon contamination. While post-weld annealing is not always necessary, it enhances the corrosion resistance of duplex stainless steel S31803 in extreme conditions.
Heat Treatment of Duplex Stainless Steel UNS S31803
Duplex UNS S31803/F51 undergoes solution annealing to enhance corrosion resistance and mechanical properties. The typical annealing temperature for duplex stainless steel UNS S31803 is between 1025°C and 1125°C, followed by rapid cooling. The temperature ranges from 150°C to 300°C, with a holding time of 30 minutes to 1 hour. Proper heat treatment ensures that duplex steel UNS S31803 retains its strength and durability in demanding applications.
Composition of Duplex Steel UNS S31803
The duplex S31803 material consists of 22% chromium, 5% nickel, 3% molybdenum, and 0.15% nitrogen. This unique composition enhances pitting and crevice corrosion resistance, making duplex SS UNS S31803 an excellent choice for offshore and aggressive environments.
Mechanical Properties of Duplex Stainless Steel S31803
The duplex UNS S31803 material has exceptional mechanical properties, with a yield strength of 450 MPa and a tensile strength of 620 MPa. The high strength-to-weight ratio makes duplex UNS S31803 a preferred choice for structural applications. While the elongation and formability of duplex stainless steel UNS S31803 are lower than austenitic grades, its high durability and corrosion resistance make it ideal for demanding industrial uses.
