Alpha Overseas
E-BROCHURE
Alpha Nickel

Duplex / Super Duplex Steel Fasteners Manufacturer, Supplier In Mumbai India

Alpha Overseas is well-known in the industry for its production and distribution of Duplex and Super Duplex Fasteners. Later, a super-duplex was created to address the special needs of the chemical and oil & gas industries. This grade of stainless steel is sometimes referred to as hyper duplex grades. Fasteners, rods, and other items made of super duplex stainless steel are among the many shapes, configurations, and specifications that are offered. The excellent ductility and weldability of super duplex stainless steel are a benefit.

These Super Duplex 2507 Bolts, also known as super duplex grade stainless steels, have a microstructure comparable to that of duplex grade stainless steels. The name "duplex" denotes that this alloy has an equal mixture of ferrite and austenite in its microstructure. Comparing the 2507 Nuts to typical stainless steel grades like the 300 series, nickel-based alloys, etc. The two-phase microstructure of the 2507 Nuts ensures greater resistance to stress corrosion cracking and pitting.

Duplex Fasteners Manufacturer, Type Super Duplex Steel Fasteners, Duplex Steel Fasteners Price List, Super Duplex Steel Fasteners, Super Duplex Stainless Steel Fasteners, DSS Fasteners, Duplex Steel Fasteners, Super Duplex Fasteners, SDSS Fasteners, Duplex Stainless Steel Fasteners Supplier in Mumbai, India.

Table Of Contents

Together, the super duplex class of stainless steel shows that Super Duplex 2507 Fasteners are made from highly alloyed stainless steel with good performance. Super duplex screws and UNS S32760 Fg Stud Bolts provide superior resistance to acids, chlorine compounds, and caustic solutions compared to 300-grade stainless steel. The mechanical qualities of the UNS S32760 Stud Bolts are greatly enhanced by their high chromium, nickel, and molybdenum content. In the case of UNS S32760 Bolting, these three factors increase the resistance to pitting and intergranular corrosion. Additionally, nitrogen is added to super duplex grade stainless steel alloy. The addition of nitrogen to the alloy of the UNS S32750 Bolts encourages structural hardening, increasing the tensile and yield strengths of the Saf 2507 Bolts without compromising the stainless steel's toughness.

Specification List of SDSS Fasteners

Standards ASTM A479, A193, A194 / ASME SA479, SA193, SA194
Bolt / Screw Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Nuts Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Washers Size M3 – M56 | 3/6″ to 2″ | Custom Sizes
Machine Screws Size M1.6 – M12
Self Tapping Screw Size No.2 – No. 14
Length 3 mm to 200 mm
Threads UNF, BSW, BSF, METRIC, UNC, or as required
Fasteners DIN : DIN 934, DIN 931, DIN 970, DIN 933, UTS : UNEF, NPT, UNC, UNS, UNF, NPTF, ISO : JIS standards, ISO 4033, ISO 4032, ANSI – American National Standards Institute ASME B18.5, ANSI B 28.2.4 1M, as per defined in ASME B16.5 standard DSS Stud Bolt length ANSI B 18.2.4 2M, as per defined in ASME B18.2.2 Super Duplex Hex nuts
Form Hex, Threading, Square, Round as per Gauge Etc.
Threads Configuration ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads.
Certification Dual Certified As per ASTM & ASME Codes
Threads Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically
Test Certificate as per EN 10204 / 3.1 Manufacturer Test Certificate
Additional Certifications PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified
Production process M24-M100: hot forging , M2-M24: Cold Froging, for custom-made connecting element machining and CNC
Dupelx / Super Duplex Steel Fasteners

Super Duplex Steel Fasteners Dimension

NOMINAL SIZE (D) BODY DIAMETER HEAD THICKNEASTM A193 ACROASTM A193 THE FLATS ACROASTM A193 CORNERS
D (MAX) D (MIN) H (MAX) H (MIN) F (MAX) F (MIN) C (MAX) C (MIN)
m10 10.00 9.78 6.63 6.17 17.00 15.73 18.48 17.77
m12 12.00 11.73 7.76 4.24 19.00 17.73 20.78 20.03
m14 14.00 13.73 9.09 8.51 22.00 20.67 24.25 23.35
m16 16.00 15.73 10.32 9.68 24.00 23.67 27.71 26.75
m20 20.00 19.67 12.88 12.12 30.00 29.16 34.64 32.95
m24 24.00 23.67 15.44 14.56 36.00 35.00 41.57 39.55
m30 30.00 29.67 19.48 17.92 46.00 45.00 53.12 50.85
m36 36.00 35.61 23.38 21.63 55.00 53.80 63.51 60.79
m42 42.00 41.38 26.97 25.03 65.00 62.90 75.06 71.71
m48 48.00 47.38 31.07 28.93 75.00 72.60 86.60 82.76
m56 56.00 55.26 36.2 33.80 85.00 82.20 98.15 93.71
m64 64.00 63.26 41.32 38.68 95.00 91.80 109.70 104.65
m72 72.00 71.26 46.45 43.55 105.00 101.40 121.24 115.60
m80 80.00 79.26 51.58 48.42 115.00 111.00 132.72 126.54
m90 90.00 89.13 57.74 54.26 130.00 125.50 150.11 143.07
m100 90.00 99.13 63.9 60.10 145.00 140.00 167.43 159.60

Size Chart of Duplex Steel Nuts

Nut Size (mm)
Diameter* (mm)
Height (mm)
Hex Nut
Jam Nut
Nylock Nut
2mm
4
1.6
1.2
–
2.5mm
5
2
1.6
–
3mm
5.5
2.4
1.8
4
4mm
7
3.2
2.2
5
5mm
8
4
2.7
5
6mm
10
5
3.2
6
7mm
11
5.5
3.5
–
8mm
13
6.5
4
8
10mm
17
8
5
10
12mm
19
10
6
12
14mm
22
11
7
14
16mm
24
13
8
16
18mm
27
15
9
18.5
20mm
30
16
10
20
* This is the diameter across the flats. It is also the size of wrench to use.

Dimensions of DSS Heavy Hex Nuts

Nominal Size or Basic Major Thread Diameter
F
G
H
Width Across Flats
Width Across Corners
Thickness
Basic
Max
Min
Max
Min
Basic
Max
Min
1/4
.2500
1/2
.500
.488
.577
.556
15/64
.250
.218
5/16
.3125
9/16
.562
.546
.650
.622
19/64
.314
.280
3/8
.3750
11/16
.688
.669
.794
.763
23/64
.377
.341
7/16
.4375
3/4
.750
.728
.866
.830
27/64
.441
.403
1/2
.5000
7/8
.875
.850
1.010
.969
31/64
.504
.464
9/16
.5625
15/16
.938
.909
1.083
1.037
35/64
.568
.526
5/8
.6250
1-1/16
1.062
1.031
1.227
1.175
39/64
.631
.587
3/4
.7500
1-1/4
1.250
1.212
1.443
1.382
47/64
.758
.710
7/8
.8750
1-7/16
1.438
1.394
1.660
1.589
55/64
.885
.833
1
1.0000
1-5/8
1.325
1.575
1.876
1.796
63/64
1.012
.956
1-1/8
1.1250
1-13/16
1.812
1.756
2.093
2.002
1-7/64
1.139
1.079
1-1/4
1.2500
2
2.000
1.938
2.309
2.209
1-7/32
1.251
1.187
1-3/8
1.3750
2-3/16
2.188
2.119
2.526
2.416
1-11/32
1.378
1.460
1-1/2
1.5000
2-3/8
2.375
2.300
2.742
2.622
1-15/32
1.505
1.433
1-5/8
1.6250
2-9/16
2.562
2.481
2.959
2.828
1-19/32
1.632
1.556
1-3/4
1.7500
2-3/4
2.750
2.662
3.175
3.035
1-23/32
1.759
1.679
2
2.0000
3-1/8
3.125
3.025
3.608
3.449
1-31/32
2.013
1.925
2-1/4
2.2500
3-1/2
3.500
3.388
4.041
3.862
2-13/64
2.251
2.155
2-1/2
2.5000
3-7/8
3.875
3.750
4.474
4.275
2-29/64
2.505
2.401
2-3/4
2.7500
4-1/4
4.250
4.112
4.907
4.688
2-45/64
2.759
2.647
3
3.0000
4-5/8
4.625
4.475
5.340
5.102
2-61/64
3.013
2.893
3-1/4
3.2500
5
5.000
4.838
5.774
5.515
3-3/16
3.252
3.124
3-1/2
3.5000
5-3/8
5.375
5.200
6.207
5.928
3-7/16
3.506
3.370
3-3/4
3.7500
5-3/4
5.750
5.562
6.640
6.341
3-11/16
3.670
3.616
4
4.0000
6-1/8
6.125
5.925
7.073
6.755
3-15/16
4.014
3.862

Duplex Steel Hex Nuts Dimension

Nominal Size or Basic Major Thread Diameter
F
G
H
Width Across Flats
Width Across Corners
Thickness
Basic
Max
Min
Max
Min
Basic
Max
Min
1/4
.2500
7/16
.438
.428
.505
.488
7/32
.226
.212
5/16
.3125
1/2
.500
.489
.577
.557
17/64
.273
.258
3/8
.3750
9/16
.562
.551
.650
.628
21/64
.337
.479
7/16
.4375
11/16
.688
.675
.794
.768
3/8
.385
.365
1/2
.5000
3/4
.750
.736
.866
.840
7/16
.448
.427
9/16
.5625
7/8
.875
.861
1.010
.982
31/64
.496
.473
5/8
.6250
15/16
.938
.922
1.083
1.051
35/64
.559
.535
3/4
.7500
1-1/8
1.125
1.088
1.299
1.240
41/64
.665
.617
7/8
.8750
1-5/16
1.312
1.269
1.516
1.447
3/4
.776
.724
1
1.0000
1-1/2
1.500
1.450
1.732
1.653
55/64
.887
.831
1-1/8
1.1250
1-11/16
1.688
1.631
1.949
1.859
31/32
.999
.939
1-3/8
1.3750
2-1/16
2.062
1.994
2.382
2.273
1-11/64
1.206
1.138
1-1/2
1.500
2-1/4
2.250
2.175
2.598
2.480
1-9/32
1.ASTM A194 GR. 8
1.245
1-5/8
1.6250
2-7/16
2.438
2.356
2.815
2.686
1-25/64
1.429
1.353
1-3/4
1.7500
2-5/8
2.625
2.538
3.031
2.893
1-1/2
1.540
1.460
2
2.0000
3
3.000
2.900
3.464
3.306
1-23/32
1.763
1.675
2-1/4
2.2500
3-3/8
3.375
3.263
3.897
3.719
1-15/16
1.986
1.890
2-1/2
2.5000
3-3/4
3.750
3.625
4.330
4.133
2-5/32
2.209
2.105
2-3/4
2.7500
4-1/8
4.125
3.988
4.763
4.546
2-3/8
2.431
2.319

Different Types of Duplex Steel Fasteners

Nuts

Duplex / Super Duplex Steel Nuts

  • Super Duplex Steel Nuts
  • Duplex Steel Coupling Nuts
  • Super Duplex Steel Wing Nuts
  • DSS Hex Jam Nuts
  • Super Duplex Slotted Nuts
  • Super Duplex Steel Nuts
  • Duplex Stainless Steel Nuts
  • Duplex Steel Heavy Hex Nuts
  • DSS Lifting Eye Nuts
  • Super Duplex Steel Hex Nuts
  • Duplex Steel Nuts
  • Super Duplex Hex Flange Nut
  • ASTM F467 Duplex Steel Nuts
  • Duplex Steel Castle Nuts
  • SDSS Nuts
  • Super Duplex Nuts
Bolts

Duplex / Super Duplex Steel Bolts

  • DSS Bolts
  • Duplex Stainless Steel Bolts
  • Super Duplex Steel Bolts
  • Duplex Steel Allen Bolts
  • Duplex Steel Bolts
  • Super Duplex Bolts
  • Super Duplex Steel Countersunk Bolts
  • ASTM A479 Duplex Steel Bolts
  • Duplex Steel Carriage Bolts
  • Super Duplex Steel Hex Bolts
  • Super Duplex Stainless Steel Bolts
  • SDSS Eye Bolts
  • Duplex Steel Hex Head Bolts
  • Super Duplex Hex Flange Bolt
  • Duplex Steel Heavy Hex Bolts
  • Super Duplex U Bolts
  • Super Duplex Steel Bolts
Washers

Duplex / Super Duplex Steel Washers

  • Super Duplex Steel Washers
  • Duplex Steel Fender Washers
  • Duplex Steel Washers
  • Super Duplex Steel Conical Spring Washers
  • SDSS Internal Tab Washer
  • SDSS Washers
  • Duplex Stainless Steel Washers
  • DSS Square Washers
  • ASTM A479 Duplex Steel Washers
  • Super Duplex Stainless Steel Washers
  • Super Duplex Washers
  • Duplex Spring Lock Washers
  • Super Duplex Steel Hex Washers
  • Super Duplex Steel Countersunk Washers
  • Super Duplex Plain Washers
Screws

Duplex / Super Duplex Steel Screws

  • SDSS Screws
  • ASTM A479 Duplex Steel Screws
  • Duplex Steel Countersunk Flat Head Screw
  • Super Duplex Screws
  • Duplex Steel Round Head Screws
  • Duplex Stainless Steel Screws
  • Duplex Steel Pan Head Screws
  • Super Duplex Steel Screws
  • Duplex Steel Hex Socket Set Screws
  • Super Duplex Serrated Flange Screw
  • SDSS Hex Head Cap Screws
  • Duplex Steel Screws
  • Duplex Mushroom Head Screws
  • Duplex Steel Socket Head Cap Screws
  • Super Duplex Stainless Steel Screws
Stud Bolts

Duplex / Super Duplex Steel Stud Bolts

  • ASTM A479 Duplex Steel Stud Bolts
  • Duplex Threaded Rods
  • Super Duplex Stainless Steel Stud Bolts
  • Super Duplex Steel Double End Stud Bolts
  • SDSS Partially Threaded Stud Bolts
  • Super Duplex Steel Stud Bolts
  • Super Duplex Steel Fully Threaded Stud Bolts
  • Duplex Stainless Steel Stud Bolts
  • Super Duplex Steel Half Threaded Stud Bolts
  • Duplex Steel Reduced Shank Stud Bolts
  • Super Duplex Stud Bolts
  • Duplex Steel Stud Bolts
  • Super Duplex Steel Tap End Stud Bolts
  • DSS Stud Bolts
Anchor Fasteners

Duplex / Super Duplex Steel Anchor Fasteners

  • DSS Anchor Fasteners
  • Duplex Anchor Fasteners
  • Super Duplex Steel Hex Nut Sleeve Anchors
  • Super Duplex Steel Hammer Drive Anchors
  • DSS Sleeve Anchor Fastener
  • Super Duplex Flat Head Sleeve Anchors
  • Duplex Steel Wedge Type Anchor Fasteners
  • Duplex Stainless Steel Anchor Fasteners
  • SDSS Anchor Fasteners
  • Super Duplex Stainless Steel Anchor Fasteners
  • Super Duplex Steel Anchor Fasteners
  • ASTM A479 Duplex Steel Anchor Fasteners
  • Duplex Steel Anchor Fasteners

Contact us to get a quick quote for your requirement.

We offer These Duplex / Super Duplex Steel Fasteners as per DIN, ISO, JIS or ANSI / ASME Standard.

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Specialized in Following Super Duplex Fasteners

  • Super Duplex Steel Industrial Fasteners
  • Duplex Stainless Steel Fastener
  • ASTM A479 Super Duplex Stud Bolts
  • Duplex Steel Flat Head Screws
  • Super Duplex Stainless Steel Hex Cap Nuts
  • DSS Nuts Price List
  • ASME B18.2.2 Duplex Steel Hex Nuts Dimension
  • Super Duplex Steel Fasteners Manufacturer in Mumbai
  • Duplex Steel Fastener Exporters
  • Super Duplex Nylock Nuts Manufacturer In India
  • DSS Oval Head Screws
  • Duplex Threaded Bolt
  • Super Duplex Acorn Nut Sleeve Anchors
  • SDSS Square Thin Nuts
  • Duplex Steel Fastener Manufacturer
  • SDSS Impeller Nuts
  • Super Duplex Steel Serrated Flange Bolts
  • Duplex Steel Fasteners
  • Grade Super Duplex Steel Fasteners
  • Duplex Flange Screws
  • ASME B18.5 Super Duplex Steel Round Head Bolts
  • Duplex Steel External Tooth Lock
  • Super Duplex Stainless Steel Hex Weld Nuts
  • Duplex Steel Hex Flange Screws
  • Super Duplex Steel Fasteners Stockist
  • Duplex Fasteners Wholesaler
  • Super Duplex Button Head Cap Screws
  • Duplex Square Head Bolt
  • Super Duplex Steel Fasteners Exporters
  • SDSS Fasteners Dealers in india
  • Duplex Stainless Steel Flat Washers
  • DSS Fasteners Exporter In India
  • ASME B18.6.3 Super Duplex Slotted Round Head Machine Screws
  • ASTM F467 Duplex Steel Heavy Hex Nuts
  • ASME B18.2.1 SDSS Stud Bolts
  • Duplex Steel Fasteners Supplier In India
  • DSS Single End Studs
  • ASME / ANSI B18.22.1 Super Duplex Plain Washers
  • Duplex Fasteners at Best Price List In Mumbai India

Applications of Super Duplex Steel Fasteners

Oil & Gas Industry

Oil & Gas Industry

Power Generation Industry

Power Generation Industry

Petrochemical Industry

Petrochemical Industry

Chemical Industry

Chemical Industry

Cement Industry

Cement Industry


We Export Super Duplex Steel Fasteners Across the Globe

Czech Republic, columbia, Bangladesh, Portugal, Ukraine, Mongolia, Ecuador, Argentina, Costa Rica, Colombia, Ghana, Finland, Morocco, Algiera, Turkey, Algeria, Egypt, Thailand, Lithuania, Trinidad & Tobago, Mexico, United Kingdom, Belarus, Bolivia, China, Russia, India, Oman, Germany, Angola, Greece, Romania, Lebanon, Peru, Slovakia, Yemen, Nigeria, Qatar, Hungary, Venezuela, Croatia, Malaysia, South Korea, France, United Arab Emirates, Iraq, Taiwan, Gabon, Italy, Hong Kong, Tibet, Jordan, Switzerland, Libya, Belgium, Israel, Sweden, Iran, Philippines, Canada, Serbia, New Zealand, Sri Lanka, Afghanistan, Puerto Rico, Austria, Bhutan, Macau, Zimbabwe, Chile, Japan, Kenya, Norway, Australia, Indonesia, Namibia, Gambia, Denmark, Tunisia, Pakistan, Kuwait, Netherlands, South Africa, Azerbaijan, Lahore, Poland, Kazakhstan, Singapore, Brazil, Ireland, Vietnam, Spain, Bahrain, Estonia, Saudi Arabia, Nepal, Bulgaria, United States.

Domestic Supply Duplex Steel Fasteners

Navi Mumbai, Indore, Ahmedabad, Chandigarh, New Delhi, Secunderabad, Kanpur, Chennai, Ernakulam , Visakhapatnam, Thane, Surat, Howrah, mumbai, Nagpur, Rajkot, Haryana, Thiruvananthapuram, Pimpri-Chinchwad, Ludhiana, Nashik, Jaipur, Ranchi, Noida, Faridabad, Kolkata, Gurgaon, Bhopal, Hyderabad, Pune, Jamshedpur, Bengaluru.

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