Steelveron

Super Duplex Fasteners

Steelvron is a leading Super Duplex Steel Fasteners Manufacturer, Supplier, and Exporter, offering high-performance fastening solutions designed for the most demanding industrial applications. Super duplex steel fasteners combine exceptional mechanical strength with superior resistance to corrosion, including stress corrosion cracking, pitting, and crevice corrosion. This unique combination of properties makes them ideal for use in aggressive environments such as offshore oil & gas platforms, chemical processing plants, desalination units, and marine applications.

Overview

Our fasteners are engineered with precision to comply with international standards including ASTM, ASME, ISO, and DIN. Steelvron manufactures bolts, nuts, studs, screws, washers, and customized fasteners using advanced CNC machining, heat treatment, and surface finishing techniques. These processes enhance tensile strength, toughness, and dimensional accuracy, ensuring that every fastener performs reliably under high pressure, elevated temperature, and corrosive conditions.

The most widely used grades – UNS S32750 and UNS S32760 – are specifically formulated for ultra-corrosive and high-strength applications. S32750 fasteners provide excellent corrosion resistance and mechanical performance in moderately aggressive environments, while S32760 fasteners offer even higher pitting and crevice corrosion resistance, making them suitable for chloride-rich and seawater applications. By combining metallurgical expertise with modern manufacturing capabilities, Steelvron guarantees fasteners that deliver long-lasting performance, precise tolerances, and superior corrosion protection, establishing us as a trusted global supplier of super duplex steel fasteners.

Technical Specifications of Super Duplex 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 Super Duplex Fasteners

Grade / Standard	C (max)	Mn	P (max)	S (max)	Cr	Mo	Ni	N	Other Elements
UNS S32750	0.03	2.0	0.03	0.02	24–26	3.0–3.5	6–8	0.24–0.32	Cu ≤ 1
UNS S32760	0.03	2.0	0.03	0.02	25–26	3.0–3.5	7–9	0.28–0.35	Cu ≤ 1

Physical Properties of Super Duplex Fasteners

Property

UNS S32750

UNS S32760

Density (g/cm³)

7.8

7.8

Melting Point (°C)

1390–1450

1390–1450

Tensile Strength (MPa)

750–950

800–1000

Yield Strength (MPa)

550–700

600–750

Elongation (%)

18–25

15–22

Hardness (HB)

280–340

300–360

Mechanical Properties Of Super Duplex Fasteners

Standard / Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)
UNS S32750	750–950	550–700	18–25
UNS S32760	800–1000	600–750	15–22

Types Of Super Duplex Fasteners We Offer

Super Duplex Bolts

Super Duplex Nuts

Super Duplex screws

Super Duplex Studs

Super Duplex Washers

Super Duplex 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 Super Duplex Steel Fasteners?

Steelvron provides fasteners with exceptional corrosion resistance, high strength, and precision, meeting ASTM, ISO, and ASME standards for critical applications.

Which grades do you supply?

We supply UNS S32750 and UNS S32760 grades, suitable for highly corrosive and high-strength applications.

Can super duplex steel fasteners handle seawater and chloride-rich environments?

Yes, they are engineered to resist pitting, crevice corrosion, and stress corrosion cracking even in aggressive marine conditions.

Are protective coatings available?

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

Are custom super duplex steel fasteners available?

Absolutely. Steelvron manufactures project-specific fasteners based on client drawings and technical requirements.

Why Choose Us?

Global Expertise

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

Complete Range

Comprehensive portfolio covering all Super Duplex 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 Super Duplex Fasteners, crafted to match exact specifications.

Worldwide Reach

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

Property	UNS S32750	UNS S32760
Density (g/cm³)	7.8	7.8
Melting Point (°C)	1390–1450	1390–1450
Tensile Strength (MPa)	750–950	800–1000
Yield Strength (MPa)	550–700	600–750
Elongation (%)	18–25	15–22
Hardness (HB)	280–340	300–360

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