What is Duplex 31803 Fasteners ?
The Duplex 31803 Fasteners are characterized by austenitic and ferritic nature. The chemical composition of this alloy consists of nickel as well as molybdenum along with chromium. This combination gives the alloy great tensile strength. These fasteners are resistant to corrosion-related corrosion cracking and corrosion pitting.
These Duplex 31803 Fasteners can also withstand chlorine bound environments and are therefore used widely in seawater as well as the off the shore applications. These fasteners also possess the property of being weldable. These fasteners can also withstand various acidic mediums such as hydrochloric acids as well as sulfuric acids. These fasteners also have great mechanical as well as chemical characteristics and can withstand temperature that is elevated.

DUPLEX STEEL S31803 INDUSTRIAL FASTENERS, DUPLEX S31803 FASTENERS, HIGH QUALITY DUPLEX STEEL S31803 FASTENERS,
Sumit Impex is known to produce excellent quality Duplex 31803 Fasteners. These fasteners could be available in different shapes, sizes and dimensions depending upon the user specifications or the requirements of the applications.
Duplex 31803 Fasteners are highly durable, can be easily fabricated, have great tensile strength, have great resistance towards corrosion, etc. Also, these fasteners undergo a large amount of chemical and mechanical tests in order to be of good quality. Sumit Impex takes into consideration the industrial specifications and standards while producing these fasteners. These fasteners also undergo a series of destructive and non-destructive tests in order to test and improve their quality. Due to all of these reasons, these Duplex 31803 Fasteners are used widely in a large number of industries.
Duplex 31803 Fasteners Specifications
Grade | Duplex 31803 Fasteners |
Specification | ASTM A 193 ASME SA 193 |
Standard | DIN, ASTM, BS and all International Standards |
Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
Length | 3 mm to 200 mm |
Form | Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts, Hex Head nuts, Square nuts, Lock nuts, Eye nuts, wing nuts, T nuts, Panel Nuts, Coupling Nuts, Dome nuts, Acorn Nuts. |
Application | Most commonly used in petroleum refineries, Boilers, Heat exchangers, Condensers, Pipelines, Cooling towers, Steam exhausts, Electric generation plants, On occasion will be found in fertilizer and chemical plants. |
STANDARD | UNS | WERKSTOFF NR. |
Duplex S31803 | S31803 | 1.4462 |
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 |
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 % |
Hexagon Bolt / Set Screws | Stud Bolt | Hexagon Nuts | Socket Cap screws |
---|---|---|---|
DIN 931 | BS4882 | DIN 934 | DIN 912 |
DIN 933 | DIN 976 | BS 1768 | DIN 6912 |
BS 1768 | BS 1769 | DIN 7984 | |
UNI 5731 | BS 1083 | ANSI B18.3 | |
UNI 5739 | BS 3692 | ISO 4762 | |
ISO 4014 | ISO 4032 | UNI 5931 | |
ISO 4017 | ISO 4033 | BS 2470 | |
BS 1769 | ANSI B18.2.2 | BS 4168 | |
BS 3692 | |||
ANSI B18.2.1 | |||
Socket & Slotted Set Screws | Socket & Slotted Countersunk Screws | Studs | Washers |
DIN 913 | DIN 963 | DIN 938 | DIN 125 |
DIN 914 | DIN 7991 | DIN 939 | DIN 9021 |
DIN 915 | BS 4168 | DIN 2510 | BS 4320 |
DIN 916 | BS 1981 | BS 4439 | BS 3410 |
DIN 551 | BS 483 | BS 2693 | |
DIN 553 | BS 2470 | Spring Washers | |
DIN 438 | DIN 127 | ||
BS 4168 | BS 4464 | ||
BS 1802 |

Other Products
Duplex S31803 T Bolt | Duplex S31803 T Bolt |
Duplex S31803 Hex Bolt | Duplex S31803 Hex Bolt |
Duplex S31803 Lag Bolt | Duplex S31803 Lag Bolt |
Duplex S31803 Counter sunk Bolt | Duplex S31803 Counter sunk Bolt |
Duplex S31803 Hex Head Nut | Duplex S31803 Hex Head Nut |
Alloy F5 Hex Bars | Alloy Steel F5 Flat Bars |
Duplex 31803 Fasteners Price List
- S31803 / S32205 Duplex Bolt/Nut
US $2500-S31803 / S322050 / Ton (FOB Price) - Bolt/Nut astm A193 S31803 / S32205
US $S31803 / S32205-1200 / Ton (FOB Price) - Duplex Bolt/Nut S31803 / S32205
US $500-2000 / Ton (FOB Price) - ASTM A193 S31803 / S32205 Duplex Bolt/Nut
US $850-2200 / Metric Ton (FOB Price) - sA193 S31803 / S32205 Bolt/Nut
US $1.5-9 / Kilogram (FOB Price) - S31803 / S32205 Bolt/Nut manufacturer
US $850-2200 / Metric Ton (FOB Price) - ASTM A193 Gr. S31803 / S32205 Bolt/Nut
US $500-1000 / Ton (FOB Price)

Packaging
We Sumit Impex Metal Ensure the best quality of Packing , because its play important role especially in a case of international shipments in which consignment pass through various channels to reach the ultimate destination, so we put extraordinary concern regarding packaging.
We pack our goods in numerous ways based on the products. We pack our products in multiple ways, such as,
- Boxes and Crates
- Shrink-wrapped
- Carton boxes
- Wooden pallets
- Wooden boxes
- Wooden crates

Testings (Destructive, Non Destructive)
- Mechanical Testing Such as Tensile, Elongation, Reduction of Area
- Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
- Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
- Positive Material Identification – PMI Testing
- Chemical Analysis – Spectro Analysis
- Intergranular Corrosion (IGC) Test
- Pitting Resistance Test
- Dye Penetrant Test (DP Test)
- Micro Test
- Macro Test
- Hardness Test
- Flaring Test
- Flattening Test
- Hydrostatic Test
- Radiography Test
- Ultra Sonic Test (UT)
- Eddy Current Testing
- Impact Test
- Bend Test

Application Industries
These material are not a single material but the name for a family of corrosion resistant steels. Like many scientific breakthrough the origins of stainless steel lies in a lucky accident. From the smallest part of zipper to the largest building skyscraper, stainless steel is an essential part of modern life.Stainless steel’s strength, resistance to corrosion and low maintenance make it the ideal material for a wide range of applications. It is also has a long life cycle and is 100% recyclable.
- Construction
- Bridges
- Petrochemical Industry
- Ship Building
- Engineering
- General Structural Purposes
- Offshore and Onshore Services

Stainless Steel Sheet Manufacturers












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