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Duplex Steel S31803 Bolts

Name: Duplex Steel S31803 Bolts
Brand: Skyland Metal & Alloys Inc.
Price: 100.0 INR
Availability: InStock

Price 100.0 INR/ Kilograms

Get a Price/Quote

MOQ : 1 Kilograms

Duplex Steel S31803 Bolts Specification

Material Composition %
Cr 21.0-23.0%, Ni 4.5-6.5%, Mo 2.5-3.5%, N 0.08-0.20%, C max 0.03%

Diameter
M4 to M36 or as required

Tensile Strength
Min. 620 MPa

Temper
Annealed

Hardness
Max 290 HB

Recyclable
Yes

Heat Resistance
Yes

Product Form
Hex Bolt / Fully Threaded

Size
M4 - M36; Lengths up to 200mm or as specified

Width
Customizable as required

Coating Type
None / Plain / Passivated

Corrosion Resistant
Excellent (suitable for chloride and marine environments)

Product Name
Duplex Steel S31803 Bolts

Steel Type
Duplex Stainless Steel

Steel Product Type
Bolt/Fastener

Grade
UNS S31803 / Duplex 2205

Thickness
As per diameter specification; typically 4mm to 36mm

Shape
Hex Bolt

Steel Standard
ASTM A479, ASTM A276, ASME SA479

Surface
Shot Blasted / Pickled / Polished / Passivated

Composition
22% Chromium, 5-6% Nickel, 3% Molybdenum, 0.15% Nitrogen, balance Iron

Application
Oil & Gas, Marine, Petrochemical, Paper & Pulp, Desalination, Chemical Processing, Power Generation

Dimension (L*W*H)
Standard and custom sizes available

Weight
Depends on size; typically 8g to 200g per piece

Color
Silver / Metallic Grey

Material Grade
S31803

Finish Type
Bright / Polished

Usage
Fastening parts in highly corrosive environments

Packing Type
Plastic Bag, Carton, Custom Packing

Thread Type
Metric, UNC, UNF, BSW threads available

Magnetic Property
Slightly magnetic due to duplex structure

Minimum Yield Strength
450 MPa

Standards Compliance
ASTM, ASME, DIN, EN, ISO

Availability
Immediate/Stock or Custom Order

Operating Temperature
-50C to +300C

Fatigue Strength
High fatigue resistance in dynamic applications

Hex Head Type
Standard, Heavy, Flange

Elongation
25-30%

Duplex Steel S31803 Bolts Trade Information

Minimum Order Quantity
1 Kilograms

Delivery Time
7 Days

Duplex Steel S31803 Bolts About

Duplex Steel S31803 bolts are used in various industries as a crucial element because of their high tensile strength, corrosion resistance, and longer service life. The S31803 grade is a part of the duplex stainless steel with a balanced structure of both austenite and ferrite phases, giving these bolts the right characteristics. These bolts are developed to work in tough conditions, and therefore, they are suitable for use in industries that require high performance and reliability.

Superior Corrosion Resistance

Duplex Steel S31803 Bolts are engineered for extreme durability in harsh conditions. With excellent resistance to chloride-induced stress corrosion and pitting, they are perfectly suited for marine, chemical, and oil & gas settings, offering reliable fastening even in high-salinity or acidic environments.

Versatile Thread and Head Options

These bolts are available with international thread standards including Metric, UNC, UNF, and BSW, and can be supplied in standard, heavy, or flange hex head types. Their adaptability in dimensions (M4-M36) and lengths ensures compatibility with a wide spectrum of applications and installation requirements.

Immediate Availability and Customization

With both stock and custom order capabilities, Duplex Steel S31803 Bolts can be delivered promptly or manufactured to meet specific project specifications. Various packing options such as plastic bags, cartons, and custom packaging ensure safe transit and storage.

FAQ's of Duplex Steel S31803 Bolts:

Q: How do Duplex Steel S31803 Bolts benefit applications in marine and chemical processing industries?

A: Duplex Steel S31803 Bolts offer exceptional corrosion resistance against chlorides and harsh chemicals, making them ideal for marine, desalination, and chemical processing environments. Their high strength and durability support safer and longer-lasting installations under aggressive conditions.

Q: What thread types and head styles are available for these bolts?

A: These bolts can be supplied with Metric, UNC, UNF, and BSW threads. Head styles include standard hex, heavy hex, and flange heads, enabling compatibility with various fastening systems and structural demands.

Q: When should I choose Duplex S31803 bolts over conventional stainless steel fasteners?

A: Choose Duplex S31803 bolts when you require higher mechanical properties, such as greater yield (450 MPa) and tensile strength (620 MPa), combined with resistance to chloride attack and superior fatigue strength, especially in dynamic or corrosive environments.

Q: Where are these bolts commonly used?

A: They are extensively used in oil & gas, petrochemical, marine, desalination, paper & pulp, power generation, and chemical processing industries, wherever strong, corrosion-resistant fastening is crucial.

Q: What is the typical process for ordering and packaging Duplex Steel S31803 Bolts?

A: Orders can be placed for immediate delivery from stock or for custom manufacturing according to specifications. The bolts are packed carefully in plastic bags, cartons, or per custom requirements to prevent damage during shipping and storage.

Q: How do I select the right size and finish for my application?

A: Sizes range from M4 to M36 with various lengths up to 200mm or as specified. Available finishes include bright, polished, pickled, passivated, or shot blasted, chosen based on environmental exposure and aesthetic needs. Custom sizes and finishes can be arranged for specialized projects.

Q: What makes Duplex S31803 bolts suitable for high-fatigue or dynamic applications?

A: Their duplex microstructure provides high fatigue strength, meaning the bolts can withstand repetitive mechanical stresses without failure. This makes them particularly suited to dynamic or load-cycling applications in demanding industries.

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