Duplex Steel S31803 Fasteners

UNS S31803 Fasteners, DIN 2.4375 Fasteners

We are Manufacture, Suplier & Export of Duplex ASTM A479 UNS S31803 / A182 F51 Fasteners, which is used for piping, tubing, and heat exchangers for the handling of gas and oil. Duplex ASTM A479 UNS S31803 Bolts has a tighter range for chromium, molybdenum and nitrogen in the higher end of the original range. Duplex ASTM A182 F51 UNS S31803 Bolts has tensile and yield strength higher than conventional austenitic or Ferritic grades of stainless steel, good weldability and good formability. Excellent resistance to localized corrosion including inter-granular, pitting and crevice corrosion; the CPT of ASTM A479 Duplex S31803 Bolts is generally at least 35 Degree C. Duplex Steel Fasteners (UNS S31803) is stainless acid resistant duplex steel with high strength and extremely good corrosion properties.

UNS S31803 is a Duplex material that provides improved potency and corrosion resistance, as well as reduced thermal expansion, higher heat conductivity than austenitic steels, increased energy absorption, and excellent workability and weldability. It reflects the amounts of chromium (22 percent) and nickel (5 percent) in the alloy. We manufacture high standard quality of these UNS S31803 Fasteners and are offered in standard sizes that ranges from M10 TO M100 and as well in customized length. Our high tensile Duplex Steel UNS S31803 Fasteners are being used at different industries like gas and oil, petrochemicals, plumbing, waste water treatment etc.

Specification Of Duplex S31803 Fasteners

Standard ASTM A479 / A194, ASME SA479 / SA194
Size M 02 to M 33
Length 3 mm to 200 mm
Threads: METRIC, BSW, BSF, UNC, UNF or as required
Standard: DIN, ISO, JIS, GB, IS, BS, ASTM, ANSI – American National Standards Institute
  • ANSI B 18.2.4 2M
  • ANSI B 28.2.4 1M
  • Stud Bolt length are defined in ASME B16.5 standard
  • Hex nuts are defined in ASME B18.2.2
  • ASME B18.5
  • BS en iso 3506

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
Scope of Manufacturer
  • Up to M36 / 1-1/2” Dia, up to 1100mm lg
  • CNC Machined Fasteners, up to M100 / 4” Dia, up to 1500mm lg
Dia M6 to M64 (1/4" - 2.5")
Length 12 MM - 500 MM (Upto 20 Inch)
IS 1363, 1364
DIN 931, 933
ISO ISO 3506
Form of: Hex, Square, Round, Threading as per Gauge Etc.
Head Drive: Phillips, Slotted, Phillips/Slot, Six-Lobe, etc
Test Certificate: Manufacturer Test Certificate as per EN 10204 / 3.1
Finishing: Zinc (yellow, white, blue, black), black oxide, , Geometry, Dacroment, anodizing, nickel plated, plated zinc-nickel, Passivated, Self-Colour, Hot Dip Galvanised (HDG), Bright Zinc Plated (BZP), Sherardized, Mechanically Applied coating and some special one like DACROMET
Production Process M2-M24: Cold Froging, hot forging M24-M100, , machining and CNC for Customized connecting element
Types Nuts, Bolts, Screws, Socket Screw, Sockets, Studs, Screw, Nut, Spring Washers, Hex Set Screw, Socket Hexagon Head Screw, Cap Screw, Wing Screw, Pan Head Screw, Machine Screw, Socket Head Cap Screw, Allen Cap screw, Wing Screw, Washers, Studs, Anchors, Hex Nut,Marine Anchors, Hexagon Nut, Hex Coupling Nut, Hex Domed Cap Nuts, Square Nut, Stud Bolts, Hex Head Bolts, Anchor Bolt, U- Bolts, J Bolts, T-Head Bolts, Mushroom Head Square Neck Bolts, Eye Bolt, Foundation Bolts, Structural Bolts

Equivalent Grades

STANDARD UNS WERKSTOFF NR.
Duplex S31803 S31803 1.4462

Chemical Composition

S31803 C N P Si Mn Mo Fe Cr S Ni
1.0 0.03 0.02 2.0 3.0 – 3.5 22.0 – 23.0 0.03 4.5 – 6.5 0.14 – 0.2 Bal

Mechanical Properties

S31803 Density Melting Point Yield Strength (0.2%Offset) Tensile Strength Elongation
7.8 g/cm3 1350 °C (2460 °F) Psi – 80000 , MPa – 550 Psi – 116000 , MPa – 800 15 %