Home > Duplex Steel > Duplex Steel S31803 Bolts
Chanathip Nickel Alloys & Plates in Bangkok produces various types of bolts, including hex bolts, heavy hex, and stud bolts, in Duplex Steel grade S31803. We manufacture these bolts under strict standards for material chemistry, forging or machining, heat treatment (possibly including solution annealing), precise thread formation, and finishing. We offer bolts in multiple sizes, both metric and imperial, with various threads and grades for sectors such as oil and gas, marine, chemical processing, and heavy industry, serving both local and export markets. Each shipment comes with certifications and material test reports.
|
Material |
Specification |
Standards |
Size
|
Length |
|
Duplex Steel S31803
|
IS
BS
ASTM
|
ASTM / ASME – A/ SA 479 / 479 |
3 mm
to
200 mm
|
M02 to M30
|
|
Grade |
Tensile Strength
(MPa) min |
Elongation
(% in 50mm) |
Yield Strength
0.2% Proof (MPa) min |
Hardness
Rockwell C (HR C) |
|---|---|---|---|---|
| Duplex Steel Bolts S31803 |
621 |
25 |
448 |
21 max |
At Chanathip Nickel Alloys, we take pride in being the largest supplier, exporter, and manufacturer of Duplex Steel S31803 Bolts in Bangkok, Thailand, providing cutting-edge solutions for all your piping needs. Our state-of-the-art production plants are strategically located in the Thailand, allowing us to maintain a vast inventory of over 16,000 tons of premium-quality materials readily available in stock. We are dedicated to delivering superior products and services, ensuring reliability and excellence for our global clientele.
Contact us to get a quick quote for your requirement.
S31803 bolts are essential wherever strong, corrosion-resistant fasteners are needed. They are used in applications such as bolting marine platforms, connecting offshore structures, fastening chemical plant flanges, assembling pump and valve parts, attaching heat exchangers, and securing seawater equipment. These bolts also find use in desalination plants, water treatment facilities, and structural applications in coastal or tropical industrial environments. When balancing cost, strength, and moderate corrosion resistance, S31803 bolts are often preferred over standard austenitic stainless steel fasteners.
