ThePipingMart Blog Products Duplex S32205 Fasteners – Composition, Properties and Uses

Duplex S32205 Fasteners – Composition, Properties and Uses

Duplex Alloy 2205 Fasteners have been used in various industries, including oil and gas, chemical, and construction, due to their exceptional properties and excellent corrosion resistance. This type of fastener is made up of a mixture of ferritic and austenitic stainless steel, making them stronger and more durable than their counterparts. Whether you are a professional in the manufacturing industry or a DIY enthusiast, understanding the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of UNS S32205 Fasteners is beneficial. Read on as we delve deeper into these aspects and gain expertise on these essential fasteners.


What is Duplex S32205 Fasteners?

S32205 Duplex Stainless Steel Fasteners are a speciality type of fastener made from a stainless steel alloy. They have a much higher strength-to-weight ratio than other fasteners and offer superior corrosion resistance and toughness. Additionally, due to their ability to resist high temperatures, they are often used in challenging environments such as the marine industry.

Duplex S32205 Fasteners Composition

Duplex 2205 Fasteners comprise a combination of ferritic and austenitic stainless steels. The main elements that make up this type of fastener include chromium, nickel, molybdenum, and nitrogen, in varying proportions. The presence of these elements in Duplex S32205 gives it improved corrosion resistance, better tensile strength, and higher durability.

Grade C Mn Si P S Cr Mo Ni N Fe
Duplex Steel S32205 0.030 max 1.20 max 0.80 max 0.035 max 0.020 max 24.00 – 26.00 3.00 – 5.00 6.00 – 8.00 0.24 – 0.32 58.095 min

Duplex S32205 Fasteners Physical Properties

DIN 1.4462 Studs have exceptional physical properties, making them the preferred fasteners for various applications. They have a density of around 7.8g/cm3, with a melting point of about 1425 °C. This type of fastener also has excellent thermal conductivity and a low coefficient of thermal expansion.





Mean Co-eff of Thermal
Expansion (μm/m/°C)

Conductivity (W/m.K)


( J/kg.K)





at 100°C

at 500°C









Duplex S32205 Fasteners Mechanical Properties

Duplex S32205 Fasteners exhibit superior mechanical properties compared to other types of fasteners. They have a high tensile strength of around 650 MPa and yield strength of 450 MPa. This makes them ideal for use in areas with high mechanical stress, such as construction and engineering.


Tensile Str
(MPa) min

Yield Strength
0.2% Proof
(MPa) min

(% in 50mm) min


Rockwell C (HR C)

Brinell (HB)





31 max

293 max

Duplex S32205 Fasteners Uses:

Duplex S32205 Fasteners have numerous applications in several industries, including oil and gas, chemical, construction, marine, and pharmaceuticals. They are often used to construct storage tanks, piping systems, pressure vessels, heat exchangers, and fasteners for offshore platforms. Due to their superior corrosion resistance, Astm A479 Duplex Steel UNS S32205 Hex Boltsare preferred over other types of fasteners for seawater applications.

Duplex S32205 Fasteners Equivalents

Duplex Steel S32205 1.4462 S32205

Duplex S32205 Fasteners Heat Treatment

UNS S32205 Hex Bolt are heat-treatable, which means that they can be strengthened by heat treatment. Heat treatment can be done by annealing, which involves heating the material to a specific temperature and allowing it to cool slowly. Another method is quenching, which involves heating the material and rapidly cooling it. Heat treatment improves the mechanical properties of Duplex S32205 Fasteners, increasing their strength and durability.

Duplex S32205 Fasteners Corrosion Resistance

S32205 Fasteners exhibit excellent corrosion resistance, making them ideal for use in harsh environments. The presence of chromium and molybdenum in the material enhances its corrosion resistance. It resists pitting and crevice corrosion and is also resistant to stress corrosion cracking. This type of fastener is also highly resistant to corrosion caused by chloride and acidic environments.


SA 182 F60 S32205 Studs are essential in various industries due to their excellent properties, mechanical strength, and corrosion resistance. Understanding the composition, physical and mechanical properties, uses, heat treatment, and corrosion resistance of Duplex S32205 Fasteners is crucial for anyone who deals with these fasteners. Whether you are in the engineering industry, construction, or a DIY enthusiast, you need to know why Duplex S32205 Fasteners are preferred over other types of stainless steel fasteners. Therefore, we hope that this blog has provided you with adequate information and insight into this vital component.

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