Steelveron

Duplex Steel Fasteners

Steelvron is a globally recognized Duplex Steel Fasteners Manufacturer, Supplier, and Exporter, specializing in high-performance fastening solutions for critical industrial applications. Our duplex steel fasteners combine the superior strength of martensitic steel with the corrosion resistance of austenitic steel, providing exceptional durability in aggressive environments. Designed to withstand high pressure, thermal stress, and corrosive media, these fasteners are trusted in demanding industries such as oil & gas, petrochemical, marine, and chemical processing.

Overview

With a commitment to precision and quality, Steelvron manufactures duplex fasteners that comply with stringent ASTM, ASME, ISO, and DIN standards. Our product range includes bolts, nuts, studs, screws, washers, and customized fasteners, all engineered with advanced CNC machining, heat treatment, and surface finishing techniques. These processes ensure that each fastener delivers high tensile strength, excellent toughness, and resistance to stress corrosion cracking, pitting, and crevice corrosion, even in chloride-rich environments.

The most commonly used grades – UNS S31803 and UNS S32205 – are specifically formulated to offer a balanced combination of mechanical and chemical properties. S31803 fasteners are ideal for moderate corrosive conditions with excellent strength, while S32205 provides enhanced resistance for more aggressive applications, including offshore structures, chemical reactors, and seawater systems. By integrating metallurgical expertise with modern manufacturing facilities, Steelvron guarantees reliable performance, dimensional accuracy, and superior corrosion resistance, making us the preferred choice for duplex steel fasteners worldwide.

Technical Specifications of Duplex Steel Fasteners

Standards:

ASTM A182, ASTM F51, ASME, DIN, ISO, JIS, BS

Grades Available:

UNS S31803, UNS S32205

Size Range:

M6 to M100 (¼” to 4”)

Length:

Up to 1000 mm (customized available)

Thread Types:

UNC, UNF, Metric, BSW, BSF

Finish:

Pickled & Passivated, Electro-Polished, Zinc Plated, PTFE Coated

Chemical Properties Of Duplex Steel Fasteners

Grade / Standard	C (max)	Mn	P (max)	S (max)	Cr	Mo	Ni	N	Other Elements
UNS S31803	0.03	2.0	0.03	0.02	22–23	3.0	5–6	0.14–0.20	Cu ≤ 1
UNS S32205	0.03	2.0	0.03	0.02	22–23	3.0	5–6	0.14–0.20	Cu ≤ 1

Physical Properties of Duplex Steel Fasteners

Property

UNS S31803

UNS S32205

Density (g/cm³)

7.8

7.8

Melting Point (°C)

1390–1450

1390–1450

Tensile Strength (MPa)

620–850

620–880

Yield Strength (MPa)

450–620

450–650

Elongation (%)

25–35

25–35

Hardness (HB)

250–320

260–330

Mechanical Properties Of Duplex Steel Fasteners

Standard / Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)
UNS S31803	620–850	450–620	25–35
UNS S32205	620–880	450–650	25–35

Types Of Duplex Steel Fasteners We Offer

Duplex Steel Bolts

Duplex Steel Nuts

Duplex Steel screws

Duplex Steel Studs

Duplex Steel Washers

Duplex Steel Custom Fasteners

Materials We Offer

Nickel Alloy Fasteners

FAQ

Your complete guide to understanding Steelvron’s products, materials, certifications, and industrial applications worldwide

Why choose Steelvron for Duplex Steel Fasteners?

Steelvron delivers duplex fasteners with superior corrosion resistance, high strength, and dimensional accuracy, complying with ASTM, ISO, and ASME standards.

Which grades are supplied?

We supply UNS S31803 and UNS S32205 grades, suitable for moderate to highly corrosive environments.

Can duplex steel fasteners withstand aggressive marine environments?

Yes, our fasteners are designed to resist pitting, crevice corrosion, and stress corrosion cracking in seawater and chloride-rich conditions.

Are protective coatings available?

Yes, finishes include pickling & passivation, electro-polishing, zinc plating, and PTFE coating.

Are customized duplex steel fasteners available?

Absolutely. Steelvron provides tailor-made fasteners as per client drawings and project requirements.

Why Choose Us?

Global Expertise

Trusted manufacturer, supplier, and exporter of Duplex Steel Fasteners worldwide.

Complete Range

Comprehensive portfolio covering all Duplex Steel Fasteners materials and types, ensuring broad compatibility.

Certified Quality

ISO-certified facilities ensure strict manufacturing and testing, delivering precision products consistently.

International Standards

Products meet ASME, ANSI, DIN, EN, BS, and JIS norms, ensuring acceptance.

Custom Solutions

Supplying standard and tailor-made Duplex Steel Fasteners, crafted to match exact specifications.

Worldwide Reach

Exporting to 50+ countries with a proven record of client satisfaction.

Property	UNS S31803	UNS S32205
Density (g/cm³)	7.8	7.8
Melting Point (°C)	1390–1450	1390–1450
Tensile Strength (MPa)	620–850	620–880
Yield Strength (MPa)	450–620	450–650
Elongation (%)	25–35	25–35
Hardness (HB)	250–320	260–330

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