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DUPLEX FASTENERS

DUPLEX FASTENERS

by | Mar 29, 2023 | DUPLEX, Focus

Duplex Fasteners

Home 9 Fasteners 9 Category: DUPLEX
DUPLEX FASTENERS

Product Specification

Chemical Composition

Mechanical Composition

Equivalent Grades

ASTM A193 Duplex Steel Fasteners, Super Duplex Fasteners, Duplex Steel Industrial Fasteners, Super Duplex Bolts, Duplex Steel Washers, Super Duplex Anchor Fasteners, Duplex Steel Nuts, Super Duplex Screws, Duplex Steel Threaded Rods, Super Duplex Fasteners Manufacturer In World Wide

Super Duplex S32750 Heavy Hex Bolts, Duplex S32205 U Bolts, Super Duplex Stud Bolts, ASME Sa194 Duplex Steel Fasteners Exporter, Duplex Metric Threaded Rods, Duplex S31803 Hex Nuts, Duplex Fastener, Duplex 2205 Spring Washer, Duplex Wedge Type Anchor Bolts, Super Duplex S32760 Ogee Washers, Duplex Machine Screws, Super Duplex 2507 Socket Cap Screws, Duplex Steel Coupling Nuts, Super Duplex Fasteners Supplier  In World Wide

Detailed Information:

The Duplex Stainless Steel Fasteners manufacture from an alloy with high chromium content and a low to moderate amount of nickel. The high chromium content in the Duplex Stainless Steel Fasteners gives the fasteners high tensile strength, hardness, and toughness. 

As such, Duplex Stainless Steel Fasteners are less likely to get damaged, deformed, or dented due to their mixed yet balanced austenite and ferrite microstructure within the alloy. Fasteners made of duplex stainless steel also have excellent mechanical properties because their microstructures mix yet are flat, containing equal amounts of austenite and ferrite.

The increased strength of Duplex Steel Fasteners also has been attributed to the austenitic composition of the structure.

In contrast, these fasteners’ toughness referred to the microstructure’s ferritic composition. Due to the extremely high mechanical strength of the alloy, Duplex Fasteners Manufacturers can significantly reduce the weight of a design product by thinning the cross-section of the finished product, proving that this alloy is cost-effective compared to other stainless steel grades. Despite the weight reduction, the quality of the product has not been compromised.

Even with its weight reduction, the Duplex Stainless Steel Fasteners have excellent performance that matches the 300-grade stainless steel series.

Moreover, the alloys that make up Duplex Steel Fixings offer superior resistance to chlorine-related stress cracking. As well as being known as the standard duplex grade of stainless steel, these 2205 Duplex Bolts are also one of the most commonly used. The Duplex 2205 Fasteners are known for having properties that are in the mid-range. Still, compared to the standard austenitic grades of stainless steel, they have excellent resistance to corrosion than their austenitic counterparts.

A leading manufacturer of high-quality Duplex and Super Duplex Steel Fasteners, RatnaExports.com finds applications in a wide variety of industries and sectors around the world. There are many UNS S32205 Duplex Steel Fasteners applications, including various industrial and household applications. Preheating UNS S32760 Super Duplex Fasteners isn’t necessary apart from preventing compression on cold metal. 

Our company’s fasteners include S31803 Bolts, S32205 Nuts, S32760 Screws, S32750 Washers, and S32950 Studs, among others. The UNS S32750 Super Duplex Fasteners we carry are also highly welded. We also offer a range of Super Duplex S32950 Fasteners extensively used in shafts, press rolls, rotors, fans, automobiles, etc. It is our pleasure to provide you with a wide range of quality UNS S31803 Duplex Steel Fasteners designed to meet both the requirements of the national and international standards for quality raw materials. Our Super Duplex Fasteners can also produce in custom lengths and shapes per your specifications.

As a leading supplier of Duplex Fasteners, RatnaExports.com adheres to national and international standards to manufacture these Fasteners under the strict supervision of professionals. Using our latest state-of-the-art technology and the best-grade materials, we manufacture all of our ASTM A193 Duplex Steel Fasteners in our factory. Our company designs high-quality Duplex Fasteners of various wall thicknesses and diameters, including Round Duplex Fasteners, Rectangular Duplex Fasteners, Hollow Duplex Fasteners, and Square Duplex Fasteners. The raw materials that we use to manufacture these Super Duplex Bolts are primarily of very high quality, and we are also one of the leading suppliers of Hastelloy Fasteners.

Duplex Fasteners Specification

 

Duplex Fasteners Material Specification 2205 Duplex Bolts, UNS S31803 Bolts
Standard DIN, UNI, ISO, JIS, GB, IS, BS, ASME, ANSI, ASTM, and all International Standards
Duplex Fasteners/ Bolts Size M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20, M24, M30, M36 to M160
Length 3 mm to 200 mm
Duplex Bolts, Studs Threads: METRIC, BSW, BSF, UNC, UNF, or as required
Duplex Steel Fasteners Standard:

ANSI – American National Standards Institute

 

  • ANSI B 18.2.4 2M
  • ANSI B 18.2.4 1M
  • Duplex Steel, Stud Bolt length, is defined in ASME B16.5 standard
  • Duplex Steel Hex nuts defined in ASME B18.2.2
  • ASME B18.5

DIN: DIN 931, DIN 933, DIN 934, DIN 970

UTS – Unified Thread Standard: UNC, UNF, UNEF, UNS,

ISO – International Organization for Standardization: ISO 4032, ISO 4033, JIS standards
SCOPE OF MANUFACTURE
  • Hot Forged Duplex Fasteners, Nut / Bolt; up to M36 / 1-1/2” Dia, up to 1100mm long
  • CNC Machined Duplex Fasteners, Nut / Bolt; up to M100 / 4” Dia, up to 1500mm long
Duplex Fasteners in the form of: Hex, Square, Round, Threading as per Gauge Etc.
Head drive: Phillips, Slotted, Phillips/Slot, Six-Lobe, etc
Duplex bolting Test Certificate: Manufacturer Test Certificate as per EN 10204 / 3.1
Duplex Fasteners finishing:

Zinc (yellow, white, blue, black), black oxide,

Geometry, Dacroment, anodizing, nickel-plated, plated zinc-nickel, Duplex Steel: Passivated

Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Duplex Steel, Mechanically Applied coating, and some special ones like DACROMET
Production process M2-M24: Cold Forging, hot forging M24-M100, machining, and CNC for Customised connecting element
Duplex bolting materials Surface Coating:
  • Teflon Coated Fasteners
  • Phosphate Coated Fasteners
  • Zinc Coated Fasteners
  • PTFE Coated Duplex Steel Fasteners
  • Xylan Coated Fasteners
  • Cadmium Coated Fasteners
  • Hot Dipped Galvanizing Coated Fasteners

All surface finishes offered, including Geomet & PTFE, Galvanised, Zinc, Electroless Nickel, Sherardized, Dacromet
Popular Types of Duplex Steel Bolts Hex Bolts, Flange Bolts, Hex Head Bolts, Lag Bolts, Square Bolts, Eye Bolts, U Bolts, T Bolts, Countersunk Bolts, etc.
Popular Types of Duplex Steel Nuts Eye, Dome, Hex Head Nut, Panel, Lock, Coupling, Square, Acorn, T, Wing, etc.
Popular Types of Duplex Steel Screw Socket Set Fasteners, Anchor Fasteners, Blind Rivet, Threaded Fasteners, Socket Head Fasteners, Machine Fasteners, Concrete Fasteners, Shoulder Fasteners, Panel Fasteners, Hex Head Cap Fasteners, etc.
Popular Types of Duplex Steel Washers Machine Washers, Star Washers, Flat Washers, Lock Washers, Split Washers, Sealing Washers, etc.
Duplex Fasteners Packing: IN BULK: canton, pallet, Small Boxes/carton/pallet, or customer request

 

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

21.0 – 23.0

2.5 – 3.5

4.50 – 6.50

0.18 – 0.20

63.72 min

Duplex S32205

0.030 max

2.00 max

1.00 max

0.030 max

0.020 max

22.0 – 23.0

3.00 – 3.50

4.50 – 6.50

0.14 – 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

0.03 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

Duplex Fastener Mechanical Properties

 

Element

TENSILE STRENGTH  ( MPA) Min.

0.2 Per Yield    Strength (MPA) Min.

Elongation (%) Min.

Hardness            ( BHN) Max.

S31803 / S32205

620

448

25

290

S32750 / S32760

800

550

15

310

Equivalent Grades for Duplex Fasteners

STANDARD

UNS

WNR.

Duplex 2205

S31803 / S32205

1.4462

 

Dimensions Chart for 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

–

–

–

Size Chart for 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 12.9 B18.3.3M    
Countersunk Socket Head Fasteners M3 to M20 12.9 B18.3.5M 10642 F835M
Button Head Socket Fasteners M3 to M12 12.9 B18.3.4M 7380 F835M
Flange Button Head Socket Fasteners M3 to M10 12.9     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
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 –      

 

Duplex Fasteners Type SIZE PROPERTY CLASS TENSILE STRENGTH STANDARD
Duplex Hex Head Fasteners M4 to M80 10.9 1040N / mm2 min

ISO 4017 (Full Thread)

ISO 4014 (Half Thread)

 

Duplex Nuts Type SIZE PROPERTY CLASS STANDARD
Duplex Hex Nut M6 to M42 10 ISO 4032
Duplex Nylock Nut

M6 to M20 (Gr.8)

M10 to M24 (Gr.10)

 8 & `10 DIN 982
Duplex Nylock Nut

M6 to M20 (Gr.8)

M10 to M24 (Gr.10)

 8 & 10 DIN 985
Duplex Hex Weld Nut M6 to M12 8 DIN 929

 

Duplex Washers Type SIZE HARDNESS STANDARD
Square Section Spring Washer, Duplex 3mm to 39mm HV (430 to 530) DIN 7980
Flat Section Spring Washer, Duplex 3mm to 39mm HV (430 to 530) DIN 127 B
Hardened Washer, Duplex 12mm to 30mm HV (300 to 370) IS 2016
Hardened Steel Washer, Duplex 12mm to 56mm

Rockwell 26 to 45 (HDG)

Rockwell 38 to 45 (Coated)

 ASTM F436M

Application of Duplex Fasteners

  •   Duplex Steel Threaded Rod used in Sea Water Equipment
  •  ASME SA479 Alloy F60 Bolts And Nuts used in Pharmaceuticals
  •  EN 1.4462 Duplex Steel Nuts used in Specialty Chemicals
  •  Duplex Bolts used in Spiral Welded tubes for burner pipes and flues
  •  ASME SA479 2205 Stud Bolts used in Petrochemicals
  •  Duplex Bolts used in Off-Shore Oil Drilling Companies
  •  Duplex Steel F60 Screws used in Gas Processing
  •  DIN 1.4462 Duplex Steel Fasteners used in Aircraft Exhaust Manifolds
  •  Duplex Steel 2205 Fasteners used in Pharmaceutical Equipment
  •  Alloy F60 Flat Washer used in Power Generation
  •  EN 1.4462 Duplex Steel Square Bolts used in Heat Exchangers

 

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London, New-York, Paris, Moscow, Tokyo, Dubai, Singapore, Barcelona, Los-Angeles, Madrid Rome, Chicago, Toronto, San-Francisco, Abu-Dhabi, St-Petersburg, Amsterdam, Berlin Prague, Washington,Istanbul, Las-Vegas, Doha, Seoul, Sydney, Beijing,  Miami, Munich, Milan, San-Diego, Bangkok, Vienna, Dublin, Vancouver, Boston,  Zurich,  Melbourne, Budapest, Houston, Seattle, Montreal, Hong-Kong, Frankfurt, Sao-Paulo, Tel-Aviv, Copenhagen, Calgary, Orlando, Atlanta, Dallas, Hamburg, Osaka, Lisbon, Austin, Phoenix Naples, Oslo, Denver, Stockholm, Riyadh, Delhi, Buenos Aires, San-Jose, Brussels, Portland Philadelphia, Ottawa, Helsinki, Valencia, Brisbane, Warsaw, Minneapolis, Shanghai, Lyon, Adelaide, Edmonton, Marseille, Muscat, Athens, Stuttgart, Rio-De-Janeii, Baltimore, Auckland, Cologne, New-Orlean, Kuwait-City,  Kiev, Hanover, Perth, Minsk, Bucharest, Nashville, Dusseldorf, Manchester, Sacramento, Glasgow, Mexico-City, Salt-Lake-Ci, Raleigh, Cracow

ALLOY STEEL

HIGH NICKEL

STAINLESS STEEL

NON FERROUS

DUPLEX

SUPER DUPLEX