Duplex Stainless Steel Fasteners<br />

Duplex Stainless Steel Fasteners

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Duplex Stainless Steel Fasteners, Duplex Steel 2205 Fasteners Manufacturer, Duplex Steel Werkstoff nr. 1.4462 Fasteners, Supplier of Duplex Steel Bolts, UNS S31803 Fasteners.

Duplex Fasteners Manufacturer, Duplex 2205 Fasteners, Duplex 2205 Hex Bolts, Duplex 2205 Studs, UNS S31803 Bolt, Duplex 2205 Nuts, 2205 Duplex Stainless Fasteners Price in India.

ASTM A A479 / ASME SA A479 Duplex Steel Fasteners, Duplex Steel High Tensile Fasteners, Duplex Steel Nuts, Duplex Steel Flat Washer Supplier, Duplex Steel UNS S32205 Threaded Rod, Duplex 2205 Round Head Bolts Manufacturer.

Lakshya Steel is a leading manufacturer and supplier of Duplex Steel Fasteners in India. We are dedicated to delivering high-quality products that exceed our clients’ expectations. Our Duplex Steel Fasteners offer twice the yield strength of conventional stainless steels, ensuring quality across a variety of applications.

We produce all our Duplex Steel Fasteners, including ASTM A193 fasteners, to strict quality standards. Our product range includes Round, Rectangular, Hollow, and Square Duplex Fasteners in various sizes, as well as a wide selection of stainless steel products. By utilizing the finest raw materials and advanced technology, we ensure that our products are strong and high-performing.

Our fastener range includes S31803 Bolts, S32205 Nuts, S32760 Screws, S32750 Washers, and S32950 Studs. We also offer custom sizes and shapes for Super Duplex Fasteners to meet specific requirements.

Both our Duplex and Super Duplex Fasteners, such as UNS S32205 and UNS S32760, are renowned for their excellent weldability and high corrosion resistance. These fasteners, along with our extensive range of stainless steel products, are widely used in various industries, including automotive and machinery. 

If you would like more information about our products, feel free to contact us at any time. We’re here to assist you. Call us now and place your order today!

Types of Duplex Steel Fasteners

Duplex Steel UNS S2205 Fasteners

Duplex Steel UNS S2205 Fasteners

Duplex Steel UNS S31803 Fasteners

Duplex Steel UNS S31803 Fasteners

What are Duplex Steel Fasteners?

Duplex Steel Fasteners are specialized fasteners made from duplex stainless steel, a unique alloy that blends the best properties of both ferritic and austenitic stainless steels. Known for their affordability, durability, and superior corrosion resistance, these fasteners are highly versatile and are often used in harsh environments where traditional fasteners may fail. The high chromium content in duplex steel, along with a moderate amount of nickel, gives these fasteners excellent corrosion resistance, particularly against localized issues such as crevice and pitting corrosion, as well as stress corrosion cracking. Because of these characteristics, Duplex Steel Fasteners are favored for applications that require enhanced performance and longevity, making them a better choice than standard fasteners in many industrial settings.

Duplex Steel Fasteners Specifications

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 28.2.4 1M
  • Duplex Steel Stud Bolt length is defined in ASME B16.5 standard
  • Duplex Steel Hex nuts are 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, NPT, NPTF

ISO – International Organization for Standardization: ISO 4032, ISO 4033, JIS standards
Source of raw materials Tata Steel, JSPL, RINL, Usha Martin, Dhamma Steel, Mukund Steel, etc.
SCOPE OF MANUFACTURE
  • Hot Forged Duplex Fasteners, Nut / Bolt; up to M36 / 1-1/2” Dia, up to 1100mm lg
  • CNC Machined Duplex Fasteners, Nut / Bolt; up to M100 / 4” Dia, up to 1500mm lg
Duplex Fasteners In 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 one like DACROMET
Production process M2-M24: Cold Forging, hot forging M24-M100, machining, and CNC for Customized connecting element
Duplex bolting materials Surface Coating:
  • Teflon Coated Fasteners
  • Phosphate Coated Fasteners
  • Zinc Coated Fasteners
  • PTFE Coated Duplex Steel Fasteners
  • Xylon 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 Nut 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 Washer Machine Washers, Star Washers, Flat Washer, Lock Washer, Split Washer, Sealing Washer, etc.
Duplex Fasteners Packing: IN BULK: canton, pallet, Small Boxs / carton/pallet, or customer request

Chemical Composition of Duplex SS Fasteners

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

Duplex Steel 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

Equivalent Grades of Duplex Stainless Fasteners

STANDARD UNS WNR.
Duplex 2205 S31803 / S32205 1.4462

Duplex Steel Fasteners Dimensions Chart

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
–
–
–

Duplex Stainless Steel Fasteners Size

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
–

Duplex Stainless Steel Fasteners Application

  • Chemical industries include tanks, pipelines, valves, and storage equipment, among other things.
  • Transport system for oil and gas.
  • Production of paper and pulp.
  • Construction of military equipment.
  • Plants that produce biofuel.
  • Drilling Offshore, Marine, and Aerospace Applications.

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