| Check here information related to duplex fasteners | |
|---|---|
| Custom Sizes | Available |
| Discount | 15% On bulk order |
| MTC | EN 10204 3.1/3.2 |
| Delivery Time |
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| Temperature limit | 570°F |
| Ready Stock of Sizes | M1.2 to M48 |
| Hardness [max] | 290 HB |
| Certificates and approval |
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| Thread |
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| Finish |
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| Process |
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| Heat Treatment | 1020 to 1100°C |
| Thread Pitch |
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| International Standard |
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| Testing Certificates |
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| Third Party Inspections |
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DSS Heavy Duty Fasteners Supplier in Mumbai
Why South Africa and Belgium Mostly Buy DSS Fasteners From Indian Suppliers
Table of Content
Refer sizes and threads of Duplex Stainless Steel Cold Forged Fasteners
Sizes & Thread of Duplex fasteners
Duplex steel heavy duty fasteners sizes
- Imperial Duplex fasteners: 1/4″ to 4″
- Metric DSS fasteners: M1.2 - M48
Thread class
- Class 1A/1B
- Class 2A/2B
- Class 3A/3B
- 8-Thread Series
Head Types
- Hexagonal head
- Oval head
- Round head
- Flat head
American standard
- ASTM A182
- ASTM A276
- ASTM A479
DSS High Temperature Fasteners widely used in pressurized applications
Duplex Stainless Steel fasteners Specification
DSS industrial fasteners required testing & certificates
- Suitability test for calibrated preload to EN 14399-10
- Charpy Impact testing in accordance with ISO 148-1
- Manufacturer Test Certificate as per EN 10204 / 3.1
- Tensile testing to ISO 898-1
- Nut proof load testing to ISO 898-2
- Suitability for preloading to EN 14399-2
SA 276 duplex marine fasteners manufacturing method
- Cold forging
- Thread forming
- Hot forging
- Heat and surface treatment
- Machining
Duplex high strength fasteners thread types
- Trapezoidal
- 12-thread series (12-UN)
- ACME
- UNEF
- BSF
- Metric fine
- Fine Thread (UNF)
- UNJ
- Coarse thread (UNC)
- 8-Thread Series(8UN)
- Metric coarse
Duplex steel machine fasteners end
- Gimlet point
- Chisel point
- Chamfer end
- Sheared end
- Half point
- 45 degree angle cut
- Cone point
- Semi-cone point
- Milled end
DSS ACME fasteners meet standards
- ASME B1.1
- GB T5783 /T5782 / 5783
- DIN 933
- ISO
- ASTM A1082
- ASME B1.5
- ISO 4014
- DIN 7991
- ANSI B 28.2.4 1M
Origin of material
- Korean
- European
- Indian
- Japanese
- Russian
- USA
Need urgent delivery
Surface treatments
- Green Finish
- PTFE / Teflon
- Mechanical
- Black Finish
- Black Oxide
MTC
- EN 10204 3.1 Manufacturer Test Certificate / PED 97/23/EC Certified
Delivery time (If not in Stock)
- 10-12 days
Melting point of duplex steel hot forging fasteners
- 2588 Degree F - 2669 Degree F
SA 276 Duplex Deck Fasteners Density
- Density (g/cm 3) : 7.805
Value added services offer by Naman Pipe & Tubes
- Cross Drilling
- Expedited Services
- Factory Direct Shipments
- Cut Off & Chamfer
- Cut Threading
- Grooving
- Drilling & Tapping
- Milling
Uses & applications
- Rigs
- Offshore
- Solar plants
- Petrochemical plants
- Automotive industry
- Bridge construction
- Construction
- Wind mills
- Ship building
Types of duplex stainless steel fasteners
- Duplex Heavy Duty Fasteners
- Duplex Alloy Cold Forged Fasteners
- DSS High Temperature Fasteners
- Duplex Alloy Fixings And Fasteners
- Duplex Stainless Steel Industrial Fasteners
Material equivalents
- 1.4462
- S31803
- S32205
Manufacturing process
- Hot Finished
- Cold Finished
Inventory delivery time
- 3-5 days
Various testings are performed on DSS Fixings And Fasteners before dispatching
Testing requirements of DSS Heavy Duty Fasteners
Testing methods
- Fatigue tests on screws
- Decarburization test
- Tensile test
- Head soundness test
- Fatigue test on H specimens
- Hardness testing
- Carburization test
- Charpy impact tests
- Retempering test
- Proof Load Test
- Torsion test
Testing standards of Duplex steel micro fasteners
- ISO 17781
- ISO 898-1
- ASTM A923
Dimensional standard
- DIN 975
- DIN 976
- DIN 931
- DIN 933
Support documents list with each delivery
- Purchase Requisitions
- Manufacturing, testing and inspection procedures
- NDE Procedure, PMI Procedure, Testing Procedures & PWHT Procedure
- Nonconformance records & Listing of applicable and authorized concessions
- Cross Sectional Assembly Drawings
- Calculation reports & Welding Procedures
- HIC test certificates
- Hardness testing & Impact test result
- Galvanizing certificates
- NDE, PMI including overlay NDE, thickness check, Ferrite check
Duplex Fasteners manufacturers in India with various sizes as per requirement
Duplex Cold Forged Fasteners Chemical Composition
|
Ni
Nickel 4.5 - 6.5 |
|
C
Carbon 0.030 |
|
Mo
Molybdenum 3.0 - 3.5 |
Cr
Chromium 22.0 - 23.0 |
|
|
N
Nitrogen 0.14 - 0.20 |
Mn
Manganese 2.00 |
|
|
P
Phosphorus 0.030 |
s
Sulfur 0.020 |
|
|
si
Silicon 1.00 |
Cu
copper 0.50 - 1.00 |
Duplex Alloy Industrial Fasteners have good corrosion resistance and mechanical strength
DSS Heavy Duty Fasteners Mechanical Properties
|
Tensile Strength (MPa) min 621 |
|
Yield Strength 0.2% Proof (MPa) min
448 |
|
Elongation (% in 50mm) min 25 |
Hardness Rockwell C (HR C) :31 max Brinell (HB) : 293 max |
Duplex Fasteners Manufacturer in India provide custom sizes as per requirement
Duplex Marine Fasteners Equivalent Grade
| STANDARD | UNS | WERKSTOFF NR. |
| DSS 2205 | S31803 | 1.4462 |
DSS Deck Fasteners Physical Properties
| Young’s Modulus (N/mm2) | 190 x 10^3 |
| Density (Kg.m-1) | 7810 |
| Specific Heat, 20°C (J.Kg-1.°K-1) | 400 |
| Thermal conductivity, 20°C | 15 |
| Magnetic Permeability | <50 |
| Mean coefficient of thermal expansion | 11 x 10^-6 |
| Specific Electrical Resistance, 20°C (µO.m) | 0.85 |
Duplex Fasteners Manufacturer in India offers various threads and face type in ready stock
Various Types of Duplex Fasteners
Duplex Fasteners
Duplex Threaded Fasteners
Duplex Cold Forged Fasteners
Duplex Steel Fasteners
DSS Hot Forging Fasteners
Duplex Machine Fasteners
Duplex Stainless Fasteners
DSS Stainless Steel Heavy Duty Fasteners
Duplex High Strength Fasteners
Duplex Marine Fasteners
DSS Stainless Steel Automotive Fasteners
DSS Construction Fasteners
Duplex Deck Fasteners
DSS Fixings And Fasteners
DSS Industrial Fasteners
Duplex Fasteners supplier in India provide non standard sizes within 4 to 5 days as per drawing
DIN Standard of Duplex Flanged Fasteners
| DIN Hex Bolts | Equivalent norms |
|---|---|
| DIN 6921 - DSS Hexagon flange Bolts metric | - |
| DIN 933 - DSS Hexagon head Bolts with thread up to head | ISO 4017, CSN 21103, PN 82105, UNI 5739, EU 24017; |
Duplex Steel Fasteners Weight Chart
| LENGTHS | #2 | #3 | #4 | #6 | #8 | #10 | #12 | 5/16″ | 1/4″ | #5 | 3/8″ |
| 1/8 | 0.40 | 0.55 | 0.70 | 1.4 | — | — | — | — | — | 1.1 | — |
| 3/16 | 0.50 | 0.70 | 0.90 | 1.5 | 2.5 | 3.9 | — | — | — | 1.2 | — |
| 1/4 | 0.60 | 0.80 | 1.00 | 1.7 | 2.8 | 4.3 | 5.6 | — | 8.5 | 1.4 | — |
| 5/16 | 0.60 | 0.90 | 1.20 | 1.9 | 3.1 | 4.6 | 6.1 | 16.7 | 9.1 | 1.5 | — |
| 3/8 | 0.70 | 0.90 | 1.30 | 2.1 | 3.4 | 5.0 | 6.5 | 17.7 | 9.8 | 1.7 | 29.2 |
| 7/16 | 0.80 | 1.00 | 1.50 | 2.2 | 3.6 | 5.4 | 6.9 | 18.8 | 10.4 | 1.9 | 30.7 |
| 1/2 | 0.80 | 1.10 | 1.60 | 2.4 | 3.9 | 5.8 | 7.4 | 19.8 | 11.1 | 2.0 | 32.2 |
| 9/16 | 0.90 | 1.20 | 1.70 | 2.6 | 4.2 | 6.2 | 7.8 | 20.9 | 11.7 | 2.2 | 33.6 |
| 5/8 | 1.00 | 1.30 | 1.80 | 2.8 | 4.5 | 6.6 | 8.3 | 21.9 | 12.4 | 2.3 | 35.1 |
| 3/4 | 1.10 | 1.50 | 2.10 | 3.2 | 5.0 | 7.3 | 9.2 | 24.0 | 13.6 | 2.6 | 38.0 |
| 7/8 | 1.30 | 1.70 | 2.30 | 3.5 | 5.6 | 8.1 | 10.1 | 26.1 | 14.9 | 3.0 | 41.0 |
| 1″ | 1.40 | 1.90 | 2.50 | 3.9 | 6.2 | 8.9 | 11.0 | 28.8 | 16.1 | 3.4 | 44.0 |
| 1-1/8″ | 1.50 | 2.00 | 2.80 | 4.3 | 6.7 | 9.6 | 11.9 | 30.2 | 17.4 | 3.8 | 47.0 |
| 1-1/4″ | 1.60 | 2.20 | 3.00 | 4.6 | 7.3 | 10.4 | 12.8 | 32.3 | 18.7 | 4.1 | 49.8 |
| 1-1/2″ | 1.80 | 2.50 | 3.50 | 5.3 | 8.3 | 11.9 | 14.7 | 36.5 | 21.2 | 4.7 | 55.8 |
| 1-3/4″ | 2.10 | 2.90 | 4.00 | 6.1 | 9.4 | 13.5 | 16.5 | 40.7 | 23.7 | 5.3 | 61.7 |
| 2″ | 2.40 | 3.30 | 4.50 | 6.8 | 10.6 | 15.0 | 18.3 | 44.8 | 26.2 | 6.0 | 67.6 |
| 2-1/4″ | 2.60 | 3.60 | 5.00 | 7.6 | 11.8 | 16.6 | 20.1 | 19.0 | 28.8 | 6.7 | 73.5 |
| 2-1/2″ | 2.80 | 3.90 | 5.50 | 8.3 | 12.9 | 18.1 | 22.0 | 53.2 | 31.3 | 7.3 | 79.5 |
| 2-3/4″ | 3.10 | 4.30 | 6.00 | 9.1 | 13.9 | 19.7 | 23.8 | 57.3 | 33.9 | 7.9 | 85.3 |
| 3″ | 3.40 | 4.70 | 6.50 | 9.8 | 15.0 | 21.2 | 25.6 | 61.5 | 36.4 | 8.6 | 91.3 |
DSS Large Fasteners Torque
| Nominal Diameter (in) | Threads (in) | Torque ft-lb (Lubricated) | Torque ft-lb (Dry) |
|---|---|---|---|
| 1/4" | 20 | 4.8 | 6.5 |
| 28 | 5.5 | 7.4 | |
| 5/16" | 18 | 10.0 | 13.2 |
| 24 | 11.0 | 14.7 | |
| 3/8" | 16 | 17.7 | 23.5 |
| 24 | 19.9 | 26.6 | |
| 7/16" | 16 | 28.2 | 37.6 |
| 24 | 31.5 | 42.0 | |
| 1/2" | 13 | 43.0 | 57.4 |
| 20 | 48.5 | 64.7 | |
| 9/16" | 12 | 62.1 | 82.7 |
| 18 | 69.2 | 92.3 | |
| 5/8" | 11 | 85.7 | 114.2 |
| 18 | 97.0 | 129.3 | |
| 3/4" | 10 | 152 | 203 |
| 16 | 170 | 226 | |
| 7/8" | 9 | 245 | 326 |
| 14 | 270 | 361 | |
| 1" | 8 | 368 | 490 |
| 14 | 412 | 549 | |
| 1-1/4" | 7 | 639 | 853 |
| 12 | 708 | 944 | |
| 1-1/2" | 6 | 639 | 1484 |
| 12 | 1252 | 1669 |
Surface Coatings of DSS Fasteners
Industrial Application Of DSS Industrial Fasteners