Duplex 2205 Bolts / EN 1.4462

Duplex 2205 bolts (EN 1.4462) are made from an austenitic-ferritic stainless steel, which was designed to deliver higher strength and corrosion resistance than 300 series stainless steels. It helps users to avoid stress corrosion cracking that is typically seen with 316 and 317. Duplex 2205 bolts combine the qualities of stress corrosion cracking resistance and high strength derived from being a ferritic alloy along with its austenitic fabrication capabilities. Download our datasheet for Duplex 2205.

Key Benefits

• Good general corrosion resistance
• High resistance to chloride stress corrosion cracking, as well as pitting and crevice corrosion
• Good sulfide stress corrosion resistance
• High strength and good fatigue resistance
• Good weldability and workability
• High energy absorption
• Low thermal expansion

Duplex 2205 Strength
In comparison to SS316, Duplex 2205 has been tested under reverse bending stresses at room temperature. The results show that the fatigue limit/yield strength is about twice as high for Duplex 2205.

Duplex 2205 Temperature Capabilities
Duplex 2205 bolts have a a ductile to brittle transition at -50°C and can also become embrittled at temperatures of 300-1000°C, therefore recommended use is -50°C to 300°C. Exposure above 300°C will not only cause the embrittlement of 2205 bolts, but also reduced corrosion resistance.

Duplex 2205 Corrosion Resistance
Providing industry with an improved corrosion solution to stainless, Duplex 2205 bolts offer good sulfide corrosion resistance, as well as chloride pitting and crevice corrosion resistant superior to 317L. The combination of chromium, molybdenum and nitrogen give Duplex 2205 bolts good protection from chloride pitting and crevice corrosion, which makes them useful for marine environments, brackish water, bleaching operations, closed loop water systems and some food processing applications. Though it is important to keep in mind that pitting corrosion can be a concern in chloride solutions when oxidizing media is present. In these conditions, the passive (protective) layer of the Duplex 2205 material may be compromised in localized pitting may occur.

Physical Properties
Density: 7,860 kg/m3
Ultimate Tensile Strength: 110 ksi
Yield Strength: 80 ksi
Thermal Conductivity at room temperature: 8.7 (BTU/hr•ft•°F)
Electrical Resistivity at room temperature: 33.5 (in x 10-6)

Duplex 2205 Uses

• Chemical industries use Duplex 2205 bolts on processing equipment, storage vessels and piping.
• Pulp and paper look to Duplex 2205 bolts for use in digesters, bleaching equipment, stock-handling systems and liquid tanks.
• Marine as well as oil & gas extraction and processing uses 2205 bolts in chloride and hydrogen sulfide environments

Availability

• All inch and metric sizes (EN 1.4462 DIN 933, DIN 931)

Resources: Duplex & Super Duplex Torque Specs, Flange Dimensions, Flange Bolting Chart

Duplex Fastener Types: Bolts, Nuts, Screws, Studs, Threaded Rods, Washers 

Flange Types Available: Blind Flanges, Lap Joint Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Weld Neck Flanges

Duplex 2205 Grades / EN 1.4462, Chemistry & Specifications

Duplex 2205, UNS S32205, EN 1.4462 is a stainless steel material, whose “Duplex” name is derived from the mixed microstructure which contains roughly equal portions of ferrite and austenite. This grade is the most popular variety and this two-phase material is a significant upgrade from 316 stainless steel in terms of both yield strength and corrosion resistance. 

Duplex 2205 Specifications: ASME SA 182, ASME SA 240, ASME SA 479, ASME SA 789, ASME SA 789 Section IV Code Case 2603, ASTM A 240, ASTM A 276 Condition A, ASTM A 276 Condition S, ASTM A 479, ASTM A 790, NACE MR0175/ISO 15156, NORSOK MDS D45 Grade F51, UNS S31803, UNS S32205, W. NR./EN 1.4462, Werkstoff 1.4462 Duplex

Mechanical Data

Super Duplex 2507 Fasteners / EN 1.4410

Super Duplex 2507 fasteners (EN 1.4410) are made of a stainless steel alloy containing 25% chromium, 4% molybdenum, and 7% nickel. A Super Duplex screw is known for its high strength and excellent localized corrosion resistance to chloride. This alloy is widely used for its yield strength which is twice that of annealed austenitic stainless steels, like 304 and 316 stainless. Download our datasheet for Super Duplex 2507.

Super Duplex 2507 Strength
Offering high impact and mechanical strength, Super Duplex 2507 bolts can be used at temperatures up to 570°F before you will see a reduction in strength.

Super Duplex Corrosion Resistance
Chloride corrosion resistance is one of the key attributes of Super Duplex 2507 screws due to its specialty metal makeup. The high molybdenum, chromium and nitrogen content of Super Duplex provides these fasteners excellent resistance to chloride corrosion such as pitting and crevice attack, while its ferritic structure makes it very resistant to stress corrosion cracking in warm chloride environments. Super Duplex 2507 fasteners and flanges also provide uniform corrosion protection from organic acids such as formic and acetic acid, plus inorganic acids, especially those containing chlorides. In addition, a Super Duplex screw is highly resistant to carbide-related intergranular corrosion due to their low carbon content (0.020% in weight).

Key Benefits of a Super Duplex Screw

• Very high resistance to pitting, erosion and crevice corrosion, as well as corrosion fatigue
• Excellent resistance to stress corrosion cracking (SCC) in chloride environments
• High resistance to general corrosion in acids
• Very high mechanical strength
• Good weldability: Can be readily joined to itself or other materials
• High thermal conductivity
• Low coefficient of thermal expansion, close to that of carbon steel.

Physical Properties
Density: 7,800 kg/m3
Ultimate Tensile Strength: 125 ksi
Yield Strength: 82 ksi
Thermal Conductivity at room temperature: 8.7 (BTU/hr•ft•°F)
Electrical Resistivity: 31.5 (in x 10-6)

Super Duplex 2507 Uses

• Process and service water systems, ballast water systems, and desalinization plants utilize Duplex 2507’s resistance to chloride.
• Mechanical assemblies and infrastructure relies on Super Duplex 2507 fasteners and flanges for their ability to withstand a high mechanical load in seawater.
• Super Duplex 2507 bolts are also used in offshore platforms, as well as oil & gas exploration and production to protect from seawater.
• Power industry flue-gas desulfurization systems and geothermal exploration units also rely on Duplex 2507 bolts.

Resources: Duplex & Super Duplex Torque Specs, Flange Dimensions, Flange Bolting Chart

Duplex Fastener Types: Bolts, Nuts, Screws, Studs, Threaded Rods, Washers 

Flange Types Available: Blind Flanges, Lap Joint Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Weld Neck Flanges

Super Duplex Alloy 2507 / EN 1.4410

Super Duplex 2507, UNS S32750, EN 1.4410, is a two-phase stainless steel and is particularly well suited for use in environments such as warm chlorinated seawater and acidic, chloride containing media. It has similiar properties to Duplex 2205 but is more corrosion resistant and performs well in moderately corrosive environments. 

Super Duplex Specifications:  EN 10216-5, ASTM A789; A790, ASTM A182 ASTM A182, ASTM A815, ASTM A240, EN 10088-2, ASTM A479, EN 10088-3 EN 10088, ISO 15156-3, NACE MR0175, Werkstoff 1.4410 S.Duplex

Mechanical Data

Super Duplex 2507 Screws

Super Duplex 2507 screws are made of a stainless steel alloy containing 25% chromium, 4% molybdenum, and 7% nickel. A Super Duplex screw is known for its high strength and excellent localized corrosion resistance to chloride. This alloy is widely used for its yield strength which is twice that of annealed austenitic stainless steels, like 304 and 316 stainless. Download our datasheet for Super Duplex 2507.

Super Duplex 2507 Strength
Offering high impact and mechanical strength, Super Duplex 2507 screws can be used at temperatures up to 570°F before you will see a reduction in strength.

Super Duplex Corrosion Resistance
Chloride corrosion resistance is one of the key attributes of Super Duplex 2507 screws due to its specialty metal makeup. The high molybdenum, chromium and nitrogen content of Super Duplex provides these screws excellent resistance to chloride corrosion such as pitting and crevice attack, while its ferritic structure makes it very resistant to stress corrosion cracking in warm chloride environments. A Super Duplex screw also provides uniform corrosion protection from organic acids such as formic and acetic acid, plus inorganic acids, especially those containing chlorides. In addition, 2507 screws are highly resistant to carbide-related intergranular corrosion due to their low carbon content (0.020% in weight).

Key Benefits

• Very high resistance to pitting, erosion and crevice corrosion, as well as corrosion fatigue
• Excellent resistance to stress corrosion cracking (SCC) in chloride environments
• High resistance to general corrosion in acids
• Very high mechanical strength
• Good weldability: Can be readily joined to itself or other materials
• High thermal conductivity
• Low coefficient of thermal expansion, close to that of carbon steel.

Physical Properties
Density: 7,800 kg/m3
Ultimate Tensile Strength: 125 ksi
Yield Strength: 82 ksi
Thermal Conductivity at room temperature: 8.7 (BTU/hr•ft•°F)
Electrical Resistivity: 31.5 (in x 10-6)

Super Duplex 2507 Uses

• Process and service water systems, ballast water systems, and desalinization plants utilize 2507’s resistance to chloride.
• Mechanical assemblies and infrastructure relies on Super Duplex 2507 screws for their ability to withstand a high mechanical load in seawater.
• Super Duplex 2507 screws are also used in offshore platforms, as well as oil & gas exploration and production to protect from seawater.
• Power industry flue-gas desulfurization systems and geothermal exploration units also rely on 2507 screws.

Resources: Duplex & Super Duplex Torque Specs, Flange Dimensions, Flange Bolting Chart

Duplex Fastener Types: Bolts, Nuts, Screws, Studs, Threaded Rods, Washers 

Flange Types Available: Blind Flanges, Lap Joint Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Weld Neck Flanges

Super Duplex Alloy 2507 

Super Duplex 2507, UNS S32750, is a two-phase stainless steel and is particularly well suited for use in environments such as warm chlorinated seawater and acidic, chloride containing media. It has similiar properties to Duplex 2205 but is more corrosion resistant and performs well in moderately corrosive environments. 

Super Duplex Specifications:  EN 10216-5, ASTM A789; A790, ASTM A182 ASTM A182, ASTM A815, ASTM A240, EN 10088-2, ASTM A479, EN 10088-3 EN 10088, ISO 15156-3, NACE MR0175, Werkstoff 1.4410 S.Duplex

Mechanical Data

Super Duplex 2507 Bolts / EN1.4410

Super Duplex 2507 bolts (EN 1.4410) are made of a stainless steel alloy containing 25% chromium, 4% molybdenum, and 7% nickel. Duplex 2507 is known for its high strength and excellent localized corrosion resistance to chloride. This alloy is widely used for its yield strength which is twice that of annealed austenitic stainless steels, like 304 and 316 stainless. Download our datasheet for Super Duplex 2507.

Super Duplex 2507 Strength
Offering high impact and mechanical strength, Super Duplex 2507 bolts can be used at temperatures up to 570°F before you will see a reduction in strength.

Super Duplex Corrosion Resistance
Chloride corrosion resistance is one of the key attributes of Super Duplex 2507 bolts due to its specialty metal makeup. The high molybdenum, chromium and nitrogen content of Super Duplex provides these bolts excellent resistance to chloride corrosion such as pitting and crevice attack, while its ferritic structure makes it very resistant to stress corrosion cracking in warm chloride environments. Super Duplex 2507 bolts also provide uniform corrosion protection from organic acids such as formic and acetic acid, plus inorganic acids, especially those containing chlorides. In addition, 2507 bolts are highly resistant to carbide-related intergranular corrosion due to their low carbon content (0.020% in weight).

Key Benefits

• Very high resistance to pitting, erosion and crevice corrosion, as well as corrosion fatigue
• Excellent resistance to stress corrosion cracking (SCC) in chloride environments
• High resistance to general corrosion in acids
• Very high mechanical strength
• Good weldability: Can be readily joined to itself or other materials
• High thermal conductivity
• Low coefficient of thermal expansion, close to that of carbon steel.

Physical Properties
Density: 7,800 kg/m3
Ultimate Tensile Strength: 125 ksi
Yield Strength: 82 ksi
Thermal Conductivity at room temperature: 8.7 (BTU/hr•ft•°F)
Electrical Resistivity: 31.5 (in x 10-6)

Super Duplex 2507 Uses

• Process and service water systems, ballast water systems, and desalinization plants utilize 2507’s resistance to chloride.
• Mechanical assemblies and infrastructure relies on Super Duplex 2507 bolts for their ability to withstand a high mechanical load in seawater.
• Super Duplex 2507 bolts are also used in offshore platforms, as well as oil & gas exploration and production to protect from seawater.
• Power industry flue-gas desulfurization systems and geothermal exploration units also rely on 2507 bolts.

Availability

• All inch and metric sizes (EN 1.4410 DIN 933, DIN 931)

Resources: Duplex & Super Duplex Torque Specs, Flange Dimensions, Flange Bolting Chart

Duplex Fastener Types: Bolts, Nuts, Screws, Studs, Threaded Rods, Washers 

Flange Types Available: Blind Flanges, Lap Joint Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Weld Neck Flanges

Super Duplex Alloy 2507  / EN 1.4410

Super Duplex 2507, UNS S32750, is a two-phase stainless steel and is particularly well suited for use in environments such as warm chlorinated seawater and acidic, chloride containing media. It has similiar properties to Duplex 2205 but is more corrosion resistant and performs well in moderately corrosive environments. 

Super Duplex Specifications:  EN 10216-5, ASTM A789; A790, ASTM A182 ASTM A182, ASTM A815, ASTM A240, EN 10088-2, ASTM A479, EN 10088-3 EN 10088, ISO 15156-3, NACE MR0175, Werkstoff 1.4410 S.Duplex

Mechanical Data