PipingProjects.eu is one of the leading Duplex Fasteners Manufacturer in Europe. We supply many excellent fastening options for a broad range of industrial applications. With an emphasis on exact engineering and respect for international standards, our fasteners are designed to ensure secure and trustworthy connections in various industries, including manufacturing, energy, and construction. As a dependable Duplex Fasteners Supplier in Europe, we place a high value on quality, innovation, and timely delivery to meet the fastening needs of our clients throughout the European market.
Duplex fasteners are hardware components made of stainless steel. Unlike typical stainless steel, duplex stainless steel has a dual-phase microstructure with ferritin and austenitic phases, giving it exceptional mechanical qualities and resistance to corrosion. Duplex fasteners are commonly used in industries requiring strong corrosion resistance and high strength, such as pulp and paper, chemical processing, oil and gas, and marine engineering.
They offer several benefits, such as resistance to stress corrosion, pitting, and crevice corrosion; increased strength that allows them to bear high loads, good weldability that makes complex fabrication easier; and long-term cost-effectiveness even with higher initial costs. Grades that combine corrosion resistance, mechanical strength, and economic viability, including Duplex 2205 and Super Duplex 2507, are widely used and essential for various applications.
As the top Duplex Fasteners Manufacturer in Europe, we take great satisfaction in providing high-calibre goods that satisfy the various demands of the continent's industries. We guarantee the fabrication of Duplex Fasteners that meet the most exact international requirements thanks to our sophisticated manufacturing techniques. We are positioned as a reliable source offering customized solutions because of our commitment to innovation, dependability, and customer satisfaction.
We are the best Duplex Fasteners Supplier in Europe because we never hesitate to commit to efficiency, quality, and customer-first methods. We place a high value on accuracy in our manufacturing procedures, guaranteeing that our goods meet and surpass industry requirements. We serve a wide range of industrial applications with our extensive selection of Duplex Fasteners. We make a name for ourselves as the preferred option for companies looking for long-lasting and practical solutions throughout Europe.
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Duplex Fasteners Specification Chart
PipingProjects.eu is a trusted Duplex Fasteners Manufacturer in Europe, provides a large selection of fasteners in a range of specifications to fit different sizes and grades.
Fateners size | Specifications |
---|---|
Duplex Fasteners Length | 3 mm to 200 mm |
Thickness | 1 to 300mm |
Size | M3 to M56 |
Temperature Range | -50-300 °C |
Thread Types | Metric, Metric course, UNF,Metric Fine, BA, BSF, UNC, UNB, BSW |
Grade | |
Duplex | D S31803, D S32205, SD S32750, SD S32760, SD S32950 |
Applications of Duplex Fasteners
Duplex Fasteners Chemical Composition
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
---|---|---|---|---|---|---|---|---|---|---|
Duplex S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
Duplex S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 – 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
Duplex S32750 | 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 S32760 | 0.05 max | 1.00 max | 1.00 max | 0.030 max | 0.010 max | 24.00 – 26.00 | 3.00 – 4.00 | 6.00 – 8.00 | 0.20 – 0.30 | 57.61 min |
What are the key properties of duplex steel that make it suitable for fastening applications?
Duplex Fasteners Mechanical Properties
Element | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
---|---|---|---|---|
S31803 / S32205 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
S32750 / S32760 | 7.8 | 0.281 | 1350 | 2460 |
Are duplex fasteners suitable for use in high-temperature environments?
Equivalent Grades of Duplex Fasteners
STANDARD | UNS | WNR. |
---|---|---|
Duplex 2205 | S31803 / S32205 | 1.4462 |
PipingProjects.eu is a trusted Duplex Fasteners Supplier in Europe. A selection of Duplex Steel Fasteners supplied by Piping Projects in Europe are shown here.
Size Chart of Duplex Fasteners
Fasteners Type
|
SIZE
|
GRADE
|
ASME
|
ISO
|
ASTM
|
---|---|---|---|---|---|
Socket Head Cap Fasteners
|
M1.6 to M64
|
12.9
|
B18.3.1 M
|
4762
|
A574M
|
Socket Low Head Cap Fasteners
|
M4 to M20
|
10.9
|
|||
Socket Head Shoulder Fasteners
|
M6 to M24
|
012.9
|
B18.3.3M
|
||
Countersunk Socket Head Fasteners
|
M3 to M20
|
012.9
|
B18.3.5M
|
10642
|
F835M
|
Button Head Socket Fasteners
|
M3 to M12
|
012.9
|
B18.3.4M
|
7380
|
F835M
|
Flange Button Head Socket Fasteners
|
M3 to M10
|
012.9
|
F835M
|
||
Knurled Point Socket Set Fasteners
|
M3 to M20
|
45H
|
B18.3.6M
|
4029
|
F912M
|
Flat Point Socket Set Fasteners
|
M6 to M12
|
45H
|
B18.3.6M
|
4026
|
F912M
|
Dog Point Socket Set Fasteners
|
M3 to M20
|
45H
|
B18.3.6M
|
4028
|
F912M
|
Cone Point Socket Set Fasteners
|
M3 to M12
|
45H
|
B18.3.6M
|
4027
|
F912M
|
Plain Point Socket Set Fasteners
|
M3 to M20
|
45H
|
B18.3.6M
|
4029
|
F912M
|
Taper Pressure Plug
|
M8 to M22
|
–
|
Dimension Chart of Duplex Fasteners
Bolt Size | USS | SAE | ||||
---|---|---|---|---|---|---|
OD (in.) | ID (in.) | Thickness | OD (in.) | ID (in.) | Thickness | |
1/8 (#6) | – | – | – | 0.375 | 0.156 | .036/.065 |
5/32 (#8) | – | – | – | 0.438 | 0.188 | .036/.065 |
3/16 (#10) | 0.560 | 0.250 | .036/.065 | 0.500 | 0.220 | .036/.065 |
7/32 (#12) | – | – | – | 0.562 | 0.250 | .051/.080 |
1/4 (#14) | 0.734 | 0.312 | .051/.080 | 0.625 | 0.281 | .051/.080 |
5/16 | 0.875 | 0.375 | .064/.104 | 0.688 | 0.344 | .051/.080 |
3/8 | 1.000 | 0.438 | .064/.104 | 0.812 | 0.406 | .051/.080 |
7/16 | 1.250 | 0.500 | .064/.104 | 0.922 | 0.469 | .051/.080 |
1/2 | 1.375 | 0.562 | .086/.132 | 1.062 | 0.531 | .074/.121 |
9/16 | 1.469 | 0.625 | .086/.132 | 1.156 | 0.594 | .074/.121 |
5/8 | 1.750 | 0.688 | .108/.160 | 1.312 | 0.656 | .074/.121 |
3/4 | 2.000 | 0.812 | .122/.177 | 1.469 | 0.812 | .108/.160 |
7/8 | 2.250 | 0.938 | .136/.192 | 1.750 | 0.938 | .108/.160 |
1 | 2.500 | 1.062 | .136/.192 | 2.000 | 1.062 | .108/.160 |
1 1/8 | 2.750 | 1.250 | .136/.192 | 2.250 | 1.250 | .108/.160 |
1 1/4 | 3.000 | 1.375 | .136/.192 | 2.500 | 1.375 | .136/.192 |
1 3/8 | 3.250 | 1.500 | .153/.213 | 2.750 | 1.500 | .136/.213 |
1 1/2 | 3.500 | 1.625 | .153/.213 | 3.000 | 1.625 | .153/.213 |
1 5/8 | 3.750 | 1.750 | .153/.213 | – | – | – |
1 3/4 | 4.000 | 1.875 | .153/.213 | – | – | – |
1 7/8 | 4.250 | 2.000 | .153/.213 | – | – | – |
2 | 4.500 | 2.125 | .153/.213 | – | – | – |
2 1/4 | 4.750 | 2.375 | .320/.248 | – | – | – |
2 1/2 | 5.000 | 2.625 | .210/.280 | – | – | – |
2 3/4 | 5.250 | 2.875 | .228/.410S | – | – | – |
3 | 5.500 | 3.125 | .249/.327 | – | – | – |
Torque Chart of Duplex Bolt Fasteners
Nominal Diameter (inch) | Torque ft-lb (Lubricated) | Threads (inch) | Torque ft-lb (Dry) |
---|---|---|---|
1/4″ | 4.8 | 20 | 6.5 |
5.5 | 28 | 7.4 | |
5/16″ | 10 | 18 | 13.2 |
11 | 24 | 14.7 | |
3/8″ | 17.7 | 16 | 23.5 |
19.9 | 24 | 26.6 | |
7/16″ | 28.2 | 16 | 37.6 |
31.5 | 24 | 42 | |
1/2″ | 43.0 | 13 | 57.4 |
48.5 | 20 | 64.7 | |
9/16″ | 62.1 | 12 | 82.7 |
69.2 | 18 | 92.3 | |
5/8″ | 85.7 | 11 | 114.2 |
97 | 18 | 129.3 | |
3/4″ | 152 | 10 | 203 |
170 | 16 | 226 | |
7/8″ | 245 | 9 | 326 |
270 | 14 | 361 | |
1″ | 368 | 8 | 490 |
412 | 14 | 549 | |
1-1/4″ | 639 | 7 | 853 |
708 | 12 | 944 | |
1-1/2″ | 639 | 6 | 1484 |
1252 | 12 | 1669 |
Most Common Uses for Duplex Fasteners
Duplex Fasteners Manufacturer in Europe
Duplex Fasteners Supplier in Europe