Uns S31803 Bolts

Suppliers and manufacturer of ASTM A479 Uns S31803 Fasteners with Exceptional sizes and Quality


Duplex Steel UNS S31803 Fasteners
Duplex Steel UNS S31803 Fasteners
ASTM A1082 UNS S31803 Bolt
ASTM A1082 UNS S31803 Bolt
Alloy 31803 Stud Bolts
Alloy 31803 Stud Bolts


If you need Asme Sa 479 S31803 Heavy Hex Bolt We can supply in nearly any size, no matter how small the size or quantity.

lloy 31803 Bolts are a form of threaded fasteners which have an external male thread. Generally, similar to screws, an Alloy S31803 Bolt tends to use a wide variety of head designs. The heads of these bolts have been designed  in such a way that it engages with the tool used to tighten them. Some stainless steel S31803 Bolt heads instead are able to lock the bolt in place, which would mean that this bolt does not move and a tool is only required for the nut end. Common kinds of bolt heads include hex, slotted hex washer, as well as the socket cap. The duplex grade stainless steel UNS S31803 Hex Head Bolt is available with a hexagonal head and threaded body. Many times the section that comes immediately under head may or may not be threaded depending on the bolt which has been selected.

The ASTM A1082 specification covers standards meant for high tensile strength stainless steel bolting such as duplex grade UNS S31803 Bolt. This specified stainless steel duplex grade ASTM A1082 UNS S31803 is used for special purpose applications such as pressure vessels. Several grades of precipitation- hardened as well as duplex or ferritic- austenitic stainless steel classes have been covered by the ASTM A1082 specification. Selection of the stainless steel grade will be dependent upon the products design, service conditions, mechanical properties as well as characteristics related to the application.

For instance, the UNS S31803 Bolt is well suited for use in those applications which require a combination of properties such as high tensile strength, along with enhanced resistance to corrosion as well as ability to function at a wide range of temperatures between  300°C to about - 50 °C.

Stainless steel grade UNS S31803 is highly resistant to intergranular corrosion due to its lower content of carbon which prevents the formation of carbide precipitation on the grain boundary . In comparison to the other austenitic stainless grades such as alloy 316, the duplex grade UNS S31803   ASTM A1082 Bolts tends to exhibit better corrosion resistance properties with a higher level of resistance to stress corrosion cracking  in comparison to either alloy 304 or alloy 316 stainless grades. Pitting corrosion and crevice corrosion of the ASTM A1082 specification Alloy S31803 Fasteners is higher than that of stainless steel alloy 316. Due to its higher resistance to corrosion the alloy grade UNS S31803 is able to demonstrate better fatigue strength in corrosive media containing  environments than that of other typically used austenitic stainless steel specifications.

UNS S31803 Fasteners also referred to as 1.4462 or  F51 has good weldability properties which are similar to that of other stainless steel grades. the Low rate of thermal expansion in the ASTM A1082 duplex grade S31803 Bolts  reduces residual stresses after the performance of welding operation. Most manufacturers recommend using duplex welding electrodes similar to that of the parent steel i.e. UNS S31083 while welding UNS S31803 Fasteners. Electric arc welding processes tend to be  well suited for welding although oxyacetylene welding is not recommended by suppliers due to the possibility of carbon pick up in the weld area of the UNS S31803 Hex Head Bolt. Whilst a post weld annealing treatment is not a requirement for many applications, performing this treatment will give the UNS S31803 Bolt optimum corrosion resistance in severe application conditions.

 Bolting such as the ASTM A1082 UNS S31803 supplied according to this specification needs to conform to the requirements as mentioned in Specification A962/A962M as well. These requirements as covered by the specification include finish, thread dimensions, marking, certification, test methods, terminology, testing, optional supplementary requirements, and others.

Hence, these stainless steel Duplex Bolts S31803 can be successfully used as an alternative to most conventionally used stainless steel specifications across various applications where properties such as higher strength and resistance to SCC or stress corrosion cracking is required. The UNS S31803 Bolting is widely used in industries like the power generation, marine, brewing,  petrochemical and chemical engineering industries. Typical applications of the alloy include bolts for equipment’s like  bushes, flanges, shafts and fasteners.


Specification Chart of Duplex Steel UNS S31803 Fasteners

Standard ASTM A479 / ASME SA479
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

  • 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
Origin and service-region: European, Origin of Western European. However projects with eastern origin are possible on request.
Top Manufacturers SPAX® Screws, GKW, Unbrako, Kundan, APL, Sundaram Precision, Infasco, EBY Fasteners Etc.
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

Types of ASTM A1082 UNS S31803 Bolt

Duplex SS UNS S31803 Bolts and Set Screws

Duplex SS UNS S31803 Bolts and Set Screws

UNS S31803 Duplex Socket Head Screws

UNS S31803 Duplex Socket Head Screws

Duplex 2205 UNS S31803 Nuts

Duplex 2205 UNS S31803 Nuts

Stainless UNS S31803 Washers

Stainless UNS S31803 Washers

UNS S31803 Duplex 2205 Threaded Rod

UNS S31803 Duplex 2205 Threaded Rod

Duplex Steel UNS S31803 Machine Screws

Duplex Steel UNS S31803 Machine Screws

ASTM A1082 UNS S31803 DSS Self Tapping Screws

ASTM A1082 UNS S31803 DSS Self Tapping Screws

UNS S31803 Grade Self Drilling Screws

UNS S31803 Grade Self Drilling Screws


Check size chart with price list of Din 1.4462 Studs and Threaded Rod, call us to know more about Ready stock


Alloy 31803 Stud Bolts Price List

Price list of UNS S31803 Bolt manufacturer in India Unit UNS S31803 Nuts & Bolts Price in India (INR) UNS S31803 Nut Bolts Price in UK Pound sterling UNS S31803 Bolts & Nuts Price in UAE Dirham
UNS S31803 Hex Head Bolt, Hex Nut & 2 Plain Washers Size M16 X 65mm set 70 0.76 UK Pound sterling 3.60 UAE Dirham
Duplex SS UNS S31803 Stud, M16 X 90mm Long +2 Heavy Hex Nuts set 200 2.17 UK Pound sterling 10.27 UAE Dirham
UNS S31803 Duplex Hex Nuts & Stud Bolts M16 X 150mm Long Stud Bolt, Thereading set 461 5.01 UK Pound sterling 23.68 UAE Dirham
Duplex 2205 UNS S31803 Hex Bolt, Nut, Lock Nut,Washer Threaded Rods: M36 X 300mm Threaded Rod/2 X Std. Nut/2 X Lock Nut/2 X Fw set 6,300 68.46 UK Pound sterling 323.56 UAE Dirham
Stainless UNS S31803 Hex Bolt, Nut, Lock Nut,Washer Threaded Rods: M16 X 60mm Hex Bolt/ Nut/ Washer/ Lock Nut set 509 5.53 UK Pound sterling 26.14 UAE Dirham
UNS S31803 Duplex 2205 Hex Head Bolt-M10-45lg set 216 2.35 UK Pound sterling 11.09 UAE Dirham
Duplex Steel UNS S31803 Materials: Full thread Stud + 2 Hex Nuts + 2 Plain Washer M16 X 150 Mm Long pcs 537 5.84 UK Pound sterling 27.58 UAE Dirham

UNS S31803 Duplex Socket Head Screws Mechanical Characteristics

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 %


Duplex Steel Uns S31803 Hex Cap Screw available with Test Certificates, check Dimensions and specification


UNS S31803 Washers Chemical Analysis

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

UNS S31803 Duplex 2205 Threaded Rod Equivalent Grades

Duplex S31803 1.4462

UNS S31803 Fasteners Stock List

Duplex SS UNS S31803 Washers 22 Cr Duplex UNS S31803 Bolts
Duplex 2205 UNS S31803 Fender Washer UNS S31803 Stainless Steel Foundation Bolts
Duplex Steel UNS S31803 Cap Screw UNS S31803 / En 1.4462 Pan Head Screw
Duplex UNS S31803 Nuts UNS S31803 Grade Tie Bar
Duplex Stainless Steel S31803 UNS Double Ended Stud Steel Grade S31803 UNS Punched Washer
Duplex Stainless Steel UNS S31803 Square Bolts UNS S31803 Jis Coupler Nuts
Duplex Steel S31803 UNS Lock Nut S31803 Uns Locking Nuts
Stainless UNS S31803 Flat Washer 1.4462 Werkstoff S31803 UNS Hex Bolts
Stainless Duplex S31803 UNS StudBolts 1.4462 S31803 UNS Square Washer
Stainless Duplex UNS S31803 Fasteners 2205 S31803 UNS Screws
Stainless Steel S31803 UNS Hex Cap Screw Alloy 2205 S31803 UNS Threaded Rod
UNS S31803 F51 Stud Bolts UNS S31803 Super Duplex Heavy Hex Nuts
Stainless Steel Grade S31803 UNS Eye Bolts UNS 31803 Round Head Bolts
UNS S31803 Duplex Stainless Steel Hex Nuts 22 Cr Duplex UNS S31803 Heavy Hex Nuts M8
UNS S31803 DSS Square Nut Duplex Grade S31803 UNS Countersunk Slotted Screw
Duplex 2205 S31803 UNS Spring Washer DSS UNS S31803 Hex Socket Cap Screw
UNS S31803 Duplex 2205 Full Threaded Stud Bolts Stainless Steel UNS S31803 High Tensile Fasteners


Uns S31803 Socket Cap Screw as well as Custom sizes Studs can be produced as per client drawing


Duplex SS UNS S31803 Fasteners Sizes

Duplex SS UNS S31803 Socket Head Cap Screws M1.6 to M64 12.9 B18.3.1 M 4762 A574M
UNS S31803 Duplex Socket Low Head Cap Screws M4 to M20 10.9
Duplex 2205 UNS S31803 Socket Head Shoulder Screws M6 to M24 012.9 B18.3.3M
Stainless UNS S31803 Countersunk Socket Head Screws M3 to M20 012.9 B18.3.5M 10642 F835M
UNS S31803 Duplex 2205 Button Head Socket Screws M3 to M12 012.9 B18.3.4M 7380 F835M
Duplex Steel UNS S31803 Flange Button Head Socket Screws M3 to M10 012.9 F835M
UNS S31803 Grade Knurled Point Socket Set Screws M3 to M20 45H B18.3.6M 4029 F912M
Duplex UNS S31803 Flat Point Socket Set Screws M6 to M12 45H B18.3.6M 4026 F912M
ASTM A1082 UNS S31803 DSS Dog Point Socket Set Screws M3 to M20 45H B18.3.6M 4028 F912M
UNS S31803 Duplex Steel Cone Point Socket Set Screws M3 to M12 45H B18.3.6M 4027 F912M
Duplex Stainless Steel UNS S31803 Plain Point Socket Set Screws M3 to M20 45H B18.3.6M 4029 F912M
UNS S31803 / En 1.4462 Taper Pressure Plug M8 to M22 -

ANSI / ASME Standards for UNS S31803 Bolt (inch series)

B18.1.1 Small Solid Rivets B18.8.1 Clevis Pins and Cotter Pins
B18.1.2 Large Rivets B18.8.2 Taper Pins, Dowel Pins, Straight Pins, Grooved Pins and Spring Pins
B18.2.1 Square and Hex Bolts and Screws B18.9 Plow Bolts
B18.2.2 Square and Hex Nuts B18.10 Track Bolts and Nuts
B18.2.6 Fasteners for use in Structural Applications B18.11 Miniature Screws
B18.3 Socket Cap, Shoulder and Set Screws B18.13 Screws and Washer Assemblies (Sems)
B18.5 Round Head Bolts B18.15 Forged Eyebolts
B18.6.2 Slotted Head Cap Screws, Square Head Set Screws, and Slotted Headless Set Screws B18.17 Wing Nuts, Thumb Screws and Wing Screws
B18.6.3 Machine Screws and Machine Screws Nuts B18.21.1 Lock Washers
B18.6.4 Thread Forming and Thread Cutting Tapping Screws and Metallic Drive Screws B18.22.1 Plain Washers
B18.7 General Purpose Semi- Tubular Rivets, Full Tubular Rivets, Split Rivets and Rivet Caps B18.23.1 Beveled Washers

Stainless UNS S31803 Fasteners DIN and ISO designations

UNS S31803 Bolt DIN No. Description
84 Slotted Cheese Head Machine Screws
85 Slotted Pan Head Machine Screws
94 Cotter Pin
125A Flat Washer (without Chamfer)
125B Flat Washer (with Chamfer)
127B Split Lock Washer
137B Spring Wave Washer
315 Wing Nut
439B Machine Screws Hex Nut, Finished Hex Jam Nut
911 Long Arm Hex Key
912 Hex Socket Head Cap Screws
916 Hex Socket Set Screws
931 Hex Head Cap Screws Partially Threaded
933 Hex Head Cap Screws Fully Threaded
934 Finished Hex Nut
939 Double End Stud
960 Hex Head Cap Screws Partially Threaded
961 Hex Head Cap Screws Fully Threaded
963 Slotted Flat Head Machine Screws
964 Slotted Oval Head Machine Screws
965 Phillips Flat Head Machine Screws
966 Phillips Oval Head Machine Screws
975 Threaded Rod
980V Hex Steel Prevailing Torque Lock Nut
985 Hex Nylon Insert Lock Nut
6334 Rod Coupling Nut
6797A External Tooth Lock Washer
6797J Internal Tooth Lock Washer
6912 Hex Low Socket Head Cap Screws
6921 Hex Flange Head Screws
6923 Hex Flange Nut
ISO 7379 Hex Socket Head Shoulder Screws
ISO 7380 Hex Button Socket Head Cap Screws
7985 Phillips Pan Head Machine Screws
7991 Hex Flat Socket Head Cap Screws

UNS S31803 Bolt Torque

Duplex SS UNS S31803 Bolts Nominal Diameter (in) Threads (in) Torque ft-lb (Dry) Torque ft-lb (Lubricated)
1/4" 20 6.5 4.8
28 7.4 5.5
5/16" 18 13.2 10.0
24 14.7 11.0
3/8" 16 23.5 17.7
24 26.6 19.9
7/16" 16 37.6 28.2
24 42.0 31.5
1/2" 13 57.4 43.0
20 64.7 48.5
9/16" 12 82.7 62.1
18 92.3 69.2
5/8" 11 114.2 85.7
18 129.3 97.0
3/4" 10 203 152
16 226 170
7/8" 9 326 245
14 361 270
1" 8 490 368
14 549 412
1-1/4" 7 853 639
12 944 708
1-1/2" 6 1484 639
12 1669 1252