Super Duplex Fasteners

Super Duplex Fasteners

These fasteners contain higher amounts of chromium, molybdenum, nitrogen and tungsten, giving them excellent corrosion resistance properties. Hence Super Duplex Fasteners are suited to deepwater offshore oil production.

Verified Supplier

Verified manufacturers and stockists

SDSS hex bolts and nuts suppliers in UAE

Super Duplex Fasteners specification

Super Duplex Fasteners Specifications

Super duplex hex bolt sizes SDSS washer size chart SS super duplex other fasteners
  • Imperial SDSS bolt: 1/4″ to 4″
  • Metric SS super duplex bolt: M1.2 – M48
  • Length: 12 – 1200mm (1/2″ – 4.0″)

Most common sizes

  • M8 hex bolt
  • M10 hex bolt
  • M12 hex bolt
  • M3 – M36
  • 1/4″ to 3″
Grades Super duplex bolts ASTM standard Super duplex bolting material temperature range
  • Alloy 2507
  • Ferralium 255
  • UNS S32750
  • UNS S32760
  • F53
  • F55
  • Zeron 100
  • ASTM A479/ A276
  • up to 650ºC
SDSS hex bolts thread class Head types of super duplex hex bolt Manufacturing method
  • Class 2A (Medium fit)
  • 4G
  • 5 HF
  • Class 1A (Loose fit)
  • 5 ONF
  • 2G
  • 6G
  • custom
  • 5 CSF
  • Class 3A (Tight fit)
  • 3G
  • 8G

Contact above super duplex bolts suppliers, stockholders & manufacturers for fine thread & long length material

  • Hex / Socket / Allen Drive
  • Slotted Drive
  • Slotted hex washer
  • Phillips Drive
  • Combination Drive
  • Pan
  • Socket cap head
  • Flat
  • Oval
  • Truss
  • Hex head
  • Button head
  • Hex washer head
  • Frearson Drive
  • CNC machined
  • Cold Forged
  • Hot Forged

Directly contact above listed super duplex fasteners manufacturers & suppliers for fast delivery in South Africa, USA, UAE, Nigeria, Oman, Qatar & Saudi Arabia

Super duplex bolt required testing & certificates Thread types Super duplex fasteners end types
  • Tensile test
  • Microstructure Analysis
  • EN 10204 / 3.1, 3.2
  • Rockwell / Brinell Hardness test
  • Impact testing
  • Charpy V-notch test
  • BSF
  • Metric fine
  • 8-Thread Series (8UN)
  • Metric coarse
  • Fine Thread (UNF)
  • 2-thread series (12-UN)
  • UNEF
  • Coarse thread (UNC)
  • UNJ
  • ACME
  • Trapezoidal
  • Milled end
  • Cone point
  • Sheared end
  • Semi-cone point
  • Gimlet point
  • Chisel point
  • 45 degree angle cut
  • Half point
  • Chamfer end
Meet standards Applications Surface treatments
  • IS – Indian
  • ASME B1.5
  • ANSI – USA
  • UNI – Italy
  • ISO 4017
  • ISO
  • ASTM A1082
  • Polish PN
  • BS – British
  • DIN 933
  • ANSI B 18.2.4 2M
  • ASME – USA
  • DIN – Germany
  • DIN 931
  • ASTM A722
  • SAE -America
  • ASME B16.5
  • EU – Europe
  • GB T5783 /T5782 / 5783
  • ANSI B 28.2.4 1M
  • DAST 021
  • CSN – Spain
  • JIS – Japan
  • ISO 4014
  • ASME B1.1
  • Wind mills
  • Bridge construction
  • Aerospace
  • Petrochemical plants
  • Ship building
  • Rigs
  • Flange joints
  • Offshore
  • Solar plants
  • Automotive industry
  • Nickel Plated
  • Oil
  • Plain
  • Zinc Nickel
  • Black Oxide
  • Black Finish
  • Yellow Zinc Plated
  • Clear Zinc Plated
  • PTFE / Teflon
  • Cadmium
  • Hot Dip Galvanized
  • Green Finish
  • Mechanical

Super duplex hex bolts in different drive & head styles for the petrochemical and oil-gas sectors in the Middle East

Types of super duplex nuts and bolts

Check large stock of Super Duplex Fasteners with verified manufacturers, stockist & suppliers in middle east

Super Duplex Hex Bolts

Super Duplex Hex Bolts

Super Duplex Steel J-bolts

Super Duplex Steel J-bolts

Super Duplex Stainless Steel U-bolts

Super Duplex Stainless Steel U-bolts

SDSS Friction Grip Bolts

SDSS Friction Grip Bolts

Super Duplex Alloy Foundation Bolts

Super Duplex Alloy Foundation Bolts

Super Duplex Grade Eye Bolts

Super Duplex Grade Eye Bolts

Super Duplex Tie Bolts

Super Duplex Tie Bolts

Super Duplex Steel T Bolts

Super Duplex Steel T Bolts

Super Duplex Stainless Steel Square Bolts

Super Duplex Stainless Steel Square Bolts

SDSS Anchor Bolts

SDSS Anchor Bolts

Super Duplex Alloy Chemical Anchor Bolts

Super Duplex Alloy Chemical Anchor Bolts

Super Duplex Grade Raisin Anchor Bolts

Super Duplex Grade Raisin Anchor Bolts

Super Duplex Marine Anchor Bolts

Super Duplex Marine Anchor Bolts

Super Duplex Steel Countersunk Bolts

Super Duplex Steel Countersunk Bolts

Super Duplex Stainless Steel Hex Nut

Super Duplex Stainless Steel Hex Nut

SDSS Nut

SDSS Nut

Super Duplex Alloy Heavy Hex Nut

Super Duplex Alloy Heavy Hex Nut

Super Duplex Grade Lock Nut

Super Duplex Grade Lock Nut

SDSS Nut

SDSS Nut

Super Duplex Nylone Nut

Super Duplex Nylone Nut

Most common SDSS nut bolt Special super duplex SS bolting material
  • Super duplex heavy hex bolt
  • Sdss socket bolt
  • Hex bolts
  • J bolt
  • Super duplex lag bolt
  • SDSS hex head bolt
  • Super duplex ss eye bolts
  • Steel super duplex shoulder bolt
  • Sdss round head bolts
  • Super duplex steel flange bolts
  • Plow bolt
  • Square bolts
  • Carriage bolt
  • Step bolt
  • Sdss machine bolt
  • Super duplex 12 point bolt
  • SDSS t-head bolt
  • Draw bolt
  • Foundation bolt
  • Super duplex tap bolt
  • Sdss t-head bolt
  • Mushroom head square neck bolts
  • Steel super duplex stove bolt
  • SDSS elevator bolt
  • Hanger bolt

Types of SDSS washers

Super Duplex Steel Plain Washer

Super Duplex Steel Plain Washer

SDSS Star Washer

SDSS Star Washer

Super Duplex Stainless Steel Spring Washer

Super Duplex Stainless Steel Spring Washer

Super Duplex Alloy Machined Washer

Super Duplex Alloy Machined Washer

Type of super duplex steel Washer
  • Hexagonal washer
  • Lock washer
  • Dock washer
  • Tab washer
  • Split washer
  • Sdss plain washer
  • Round washer
  • Super duplex flat washer
  • Sdss dome tooth washer
  • Tooth lock washer
  • Dome washer
  • Square washer
  • Spherical washer
  • Spring washer
  • Fender washer
  • Punched washer
  • Hex washers
  • Countersunk washer
  • Ogee washer
  • Machined washer

Super duplex bolts strength

Tensile Strength Yield Strength
800 MPa 550 MPa

Equivalent standard of super duplex bolts and nuts

Alloy Common Name European UNS ASTM/ASME
2507 Alloy 2507 ® SAF 1.4410 UNS S32750 SA479 / F53 / A479

Super duplex stainless steel fasteners chemical composition

Phosphorus Sulphur Silicon Carbon Manganese Nickel Molybdenum Nitrogen Copper Chromium
0.035 % max 0.02 % max 0.80 % max 0.03% Max 1.20 % max 6.00 – 8.00 % 3.00 – 5.00 % 0.24 – 0.32 % 0.50 % max 24.0 – 26.0 %

Mechanical properties of super duplex bolt material

Tensile Strength Yield Strength Elongation at break Hardness, Brinell
800 MPa 550 MPa 15% 310 max

Super Duplex Fasteners Properties

Super duplex bolt torque

Nominal Diameter (in) Torque ft-lb (Lubricated) Threads (in) Torque ft-lb (Dry)
1/4″ 5.5 20 7.4
6.3 28 8.4
5/16″ 11.4 18 15.1
12.6 24 16.8
3/8″ 20.2 16 26.9
22.8 24 30.4
7/16″ 32.3 14 43.0
36.0 20 48.0
1/2″ 49.1 13 65.6
55.4 20 73.9
9/16″ 71.0 12 94.5
79.1 18 105.5
5/8″ 97.9 11 130.5
110.9 18 147.8
3/4″ 174 10 232
194 16 258
7/8″ 280 9 373
309 14 412
1″ 420 8 560
471 14 628
1-1/4″ 730 7 975
809 12 1079
1-1/2″ 1271 6 1696
1430 12 1908

Buy super duplex stainless steel fasteners in Dubai at the best price. Also check super duplex steel eye bolts torque specs, dimension

The fact that super duplex grades are highly alloyed and their mechanical and corrosion resistance properties of these alloys is ranges from excellent to good. They have one drawback. There may be a development of intermetallic phases or a drastic reduction of impact resistance if they are improperly processed.

Super duplex bolts are fasteners whose shank consists of threads emerging from below their head. They have higher mechanical strength and better creep resistance even at higher temperatures.

Unlike traditional stainless steel alloys, they are highly alloyed. Thus these fasteners have a higher PREN value (pitting resistance equivalent number) i.e. – 38 – 45. They are better at resisting corrosion compared to duplex alloys and work well in stronger acid and base environments.

All super duplex bolting material as per ASTM A479/ A276 specification. Choose from trusted suppliers who are specialized in super duplex steel chemical anchor bolts, raisin anchor bolts, marine anchor bolts, and countersunk bolts in Middle East countries.

Super duplex steel u-bolts, j-bolts, t-bolt, square bolts and foundation bolts for filtration system

Components made from super duplex alloys were specifically designed to cater for the demands of the oil and gas industry. The deposition of hydrogen or sulfur on traditional stainless steel pipes would cause them to break down by stress-related corrosion cracking. Since the PREN of super duplex fasteners is higher, they deliver excellent performance in the oil and gas sector.

Buy a super duplex steel anchor bolts, carriage bolt and friction grip bolts as per DIN, ISO standard at genuine price in GCC countries

A carriage Bolt is similar in appearance to a U Bolt. However, they are shorter in length and are used to fasten two materials together without a nut. These are preferred in assemblies that require very small and/or unobtrusive fastening. A super duplex U Bolt, on the other hand, is used in structural assemblies. They have higher tensile strength and can form both temporary & permanent attachments.

Other Grades