SS 904L Fasteners Suppliers & Exporters in Europe, USA and Gulf Countries
Aurum Overseas is a trusted supplier and exporter of SS 904L fasteners for chemical processing, offshore platforms, seawater systems, petrochemical plants, and refinery infrastructure. These fasteners are selected for aggressive acidic and chloride-rich environments where conventional stainless steels may not provide sufficient corrosion resistance.
SS 904L contains higher nickel, molybdenum, and copper content, providing excellent resistance to sulfuric acid, pitting, crevice corrosion, and chloride attack. It is widely used in fertilizer plants, marine systems, offshore engineering, and acidic process equipment requiring long service life and reduced maintenance.
Aurum Overseas supplies SS 904L fasteners to major international markets including the USA, Canada, Mexico, UAE, Saudi Arabia, Germany, France, Italy, Spain, Netherlands, Qatar, and Oman, supporting EPC contractors, manufacturers, distributors, and industrial buyers with reliable export supply.
SS 904L Fasteners Specifications & Standards
SS 904L fasteners are manufactured according to applicable ASTM, ASME, EN, DIN, and ISO standards for chemical, offshore, marine, refinery, and other corrosion-resistant applications.
SS 904L Fasteners Specifications Table
| Specification | Details |
|---|---|
| Material Grade | Stainless Steel 904L |
| UNS Number | UNS N08904 |
| Werkstoff Number | 1.4539 |
| EN Grade | EN 1.4539 |
| ASTM Standards | ASTM A193, ASTM A182, ASTM A276, ASTM A479 |
| ASME Standards | ASME SA193, SA182, SA479 |
| ISO Standards | ISO 4014, ISO 4017, ISO 4032 |
| DIN Standards | DIN 931, DIN 933, DIN 912, DIN 934 |
| Thread Types | Metric, UNC, UNF, BSW |
| Diameter Range | M3 to M56 |
| Imperial Sizes | 3/8” to 2”+ |
| Length Range | 3 mm to 200 mm+ |
| Surface Finish | Pickled, Passivated, PTFE Coated |
| Certifications | EN 10204 3.1 / 3.2 |
| Supply Capability | Export Worldwide |
SS 904L Fasteners Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| UNS | N08904 |
| EN | 1.4539 |
| DIN | 1.4539 |
| JIS | SUS 904L |
| AFNOR | Z2 NCDU 25-20 |
Chemical Composition of SS 904L Fasteners
SS 904L combines high nickel and molybdenum content with controlled copper addition for improved resistance to acidic and chloride-rich environments.
SS 904L Chemical Composition Table
| Element | Composition (%) | Functional Benefit |
|---|---|---|
| Chromium (Cr) | 19.0 – 23.0 | Oxidation and corrosion resistance |
| Nickel (Ni) | 23.0 – 28.0 | Chloride stability |
| Molybdenum (Mo) | 4.0 – 5.0 | Pitting resistance |
| Copper (Cu) | 1.0 – 2.0 | Sulfuric acid resistance |
| Carbon (C) | Max 0.020 | Improved weldability |
| Nitrogen (N) | Max 0.10 | Structural stability |
| Iron (Fe) | Balance | Mechanical support |
Corrosion Resistance Characteristics
| Corrosion Environment | SS 904L Performance |
|---|---|
| Sulfuric Acid | Excellent |
| Phosphoric Acid | Excellent |
| Chloride Pitting | Very High |
| Crevice Corrosion | Excellent |
| Seawater Exposure | Very Good |
| Stress Corrosion Cracking | Improved vs 316L |
Mechanical and Physical Properties of SS 904L Fasteners
SS 904L fasteners provide reliable mechanical performance and structural stability for demanding chemical, marine, offshore, and industrial environments.
Mechanical Properties of SS 904L Fasteners
| Property | Value |
|---|---|
| Tensile Strength | 490 MPa Min |
| Yield Strength | 220 MPa Min |
| Elongation | 35% Min |
| Hardness | Max 90 HRB |
| Modulus of Elasticity | 190 GPa |
Physical Properties of SS 904L Fasteners
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Range | 1300 – 1390°C |
| Thermal Conductivity | 11.5 W/m·K |
| Thermal Expansion | 15 × 10⁻⁶ /°C |
| Electrical Resistivity | 952 nΩ·m |
SS 904L Fasteners for Acidic, Offshore and Marine Applications
SS 904L fasteners are used in sulfuric and phosphoric acid systems, fertilizer plants, offshore platforms, seawater cooling equipment, flue gas desulfurization systems, and chemical processing units where corrosion severity is high.
Their resistance to chloride pitting, crevice corrosion, and acidic environments makes them suitable for marine and offshore equipment as well as refinery and petrochemical systems requiring long-term fastening reliability.
Corrosion Resistance Comparison Table
| Property | SS 904L | SS 316L |
|---|---|---|
| Sulfuric Acid Resistance | Excellent | Moderate |
| Chloride Pitting Resistance | Very High | Moderate |
| Crevice Corrosion Resistance | Excellent | Moderate |
| Seawater Performance | Very Good | Fair |
| Acidic Process Suitability | Excellent | Limited |
SS 904L vs SS 316L Fasteners for Corrosion and Acid Processing
SS 904L is preferred for more aggressive acidic and chloride environments, while SS 316L is commonly used where moderate corrosion resistance is sufficient.
For less severe marine, piping, and general corrosive applications, SS 316L Fasteners Supplier offers suitable low-carbon stainless steel fastening solutions. SS 904L is better suited where sulfuric acid resistance, localized corrosion resistance, and higher corrosion severity are the primary concerns.
SS 904L vs SS 316L Fasteners Comparison
| Property | SS 904L | SS 316L |
|---|---|---|
| Nickel Content | Higher | Lower |
| Copper Content | Present | Minimal |
| Sulfuric Acid Resistance | Excellent | Moderate |
| Chloride Resistance | Very High | Moderate |
| Pitting Resistance | Superior | Standard |
| Cost | Higher | Lower |
| Typical Industries | Chemical, Offshore | General Marine |
Types of SS 904L Fasteners Available for Industrial Export Projects
SS 904L fasteners are available in multiple configurations for pressure equipment, offshore structures, chemical plants, marine assemblies, and refinery piping systems.
SS 904L Fasteners Types Table
| Fastener Type | Industrial Application |
|---|---|
| Hex Bolts | Pressure systems and offshore assemblies |
| Heavy Hex Bolts | Refinery and petrochemical equipment |
| Stud Bolts | Flange connections |
| Socket Head Cap Screws | Precision industrial machinery |
| Anchor Bolts | Structural installations |
| Threaded Rods | Industrial support systems |
| U-Bolts | Marine and piping applications |
| Hex Nuts | Heavy engineering assemblies |
| Lock Nuts | High-vibration systems |
| Flat Washers | Load distribution |
| Spring Washers | Dynamic loading applications |
Thread Standards and Size Range
| Parameter | Range |
|---|---|
| Metric Sizes | M3 to M56 |
| Imperial Sizes | 3/8” to 2”+ |
| Thread Types | UNC, UNF, Metric, BSW |
| Rod Length | Up to 5 meters |
| Manufacturing | Rolled and Cut Threads |
Hex Bolts
Nuts
Screws
Threaded Bars
Washers
Stud Bolts
Global Export Markets
Aurum Overseas supplies SS 904L fasteners to major industrial and engineering markets worldwide, supporting EPC contractors, manufacturers, distributors, and industrial buyers.
USA
Canada
Mexico
UAE
Saudi
Arabia
Germany
France
Italy
Spain
Netherlands
Belgium
Poland
Qatar
Oman
Kuwait
Bahrain
Testing, Inspection and EN 10204 Certification for SS 904L Fasteners
SS 904L fasteners undergo inspection and testing to support refinery, offshore, marine, and chemical processing project requirements.
Inspection and Testing Table
| Inspection Type | Purpose |
|---|---|
| PMI Testing | Material grade verification |
| Tensile Testing | Mechanical validation |
| Hardness Testing | Surface hardness control |
| IGC Testing | Intergranular corrosion resistance |
| Dimensional Inspection | Precision verification |
| Third-Party Inspection | Export project approval |
Certification Support
| Certification | Availability |
|---|---|
| EN 10204 3.1 | Available |
| EN 10204 3.2 | Available |
| Mill Test Certificates | Available |
| Heat Number Traceability | Available |
| Export Documentation | Available |
Export Packaging, Documentation and Global Logistics Support
SS 904L fasteners are packed using sealed cartons, moisture-resistant wrapping, fumigated wooden crates, and customized export packaging to reduce contamination, corrosion, and transit damage.
Aurum Overseas supports FOB, CIF, and other commercial export arrangements with material traceability, packing lists, inspection records, Mill Test Certificates, and required export documentation.
Why Industrial Buyers Choose Aurum Overseas for SS 904L Fasteners
Aurum Overseas supplies SS 904L fasteners for offshore, marine, refinery, chemical processing, and acidic industrial applications with a focus on certified quality and application-specific requirements.
International export logistics, inspection documentation, custom manufacturing, and project-oriented support help meet the requirements of EPC contractors, offshore engineering companies, refinery operators, and chemical industries.
FAQs – SS 904L Fasteners Suppliers & Exporters
SS 904L fasteners contain copper, molybdenum, and high nickel content which significantly improve resistance to sulfuric acid and aggressive acidic process environments compared to standard stainless steels.
Yes, SS 904L fasteners provide excellent resistance to chloride pitting and crevice corrosion, making them suitable for offshore platforms, marine equipment, and seawater cooling systems.
SS 904L fasteners are supplied according to ASTM, ASME, EN, DIN, and ISO standards including ASTM A193, ASTM A182, EN 1.4539, and related industrial specifications.
Yes, Aurum Overseas exports SS 904L fasteners globally including Germany, Netherlands, Norway, USA, UAE, Saudi Arabia, Qatar, Oman, Kuwait, and Bahrain.
SS 904L fasteners are supplied with EN 10204 3.1 / 3.2 certification, Mill Test Certificates, PMI reports, and export documentation support for industrial project requirements.
Request a Quote for SS 904L Fasteners
Looking for reliable SS 904L fasteners for offshore, chemical processing, refinery, marine, or acidic applications? Aurum Overseas provides bulk supply, custom manufacturing, certifications, and international export support.
Contact our team for pricing, technical specifications, documentation, and project RFQ requirements.
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