SMO 254 Fasteners for Marine, Offshore and Chemical Applications
Aurum Overseas is a trusted SMO 254 Fasteners Supplier and Exporter, supplying high-performance fastening solutions for highly corrosive environments. Also known as 6MO Fasteners, SMO 254 offers excellent resistance to pitting, crevice corrosion, chloride attack, and stress corrosion cracking.
SMO 254 fasteners are widely used in offshore platforms, marine systems, desalination plants, chemical processing, power generation, and seawater equipment where standard grades such as 304 and 316 may not provide sufficient corrosion resistance.
The range includes bolts, nuts, screws, washers, stud bolts, threaded rods, U-bolts, socket head cap screws, and custom fasteners. Aurum Overseas supports international buyers with material traceability, inspection documentation, and export logistics.
SMO 254 Fasteners Product Overview
SMO 254 is a high-performance stainless steel containing high chromium, molybdenum, nickel, and nitrogen, providing strong resistance to chloride-rich and aggressive chemical environments.
These properties make SMO 254 fasteners suitable for offshore structures, desalination plants, seawater handling systems, chemical equipment, and pulp & paper facilities requiring high corrosion resistance and dependable mechanical performance.
SMO 254 Fasteners Specifications
| Specification | Details |
|---|---|
| Material Grade | SMO 254 / 6MO Stainless Steel |
| 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 | Plain, Passivated, PTFE Coated |
| Certifications | EN 10204 3.1 / 3.2 |
| Supply Capability | Export Worldwide |
Mechanical Properties of SMO 254 Fasteners
SMO 254 fasteners combine high mechanical strength with excellent corrosion resistance, making them suitable for demanding marine, offshore, chemical, and desalination applications.
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1320–1390°C |
| Tensile Strength | 650 MPa |
| Yield Strength (0.2% Offset) | 300 MPa |
| Elongation | 35% |
Chemical Composition of SMO 254 Fasteners
SMO 254 combines high molybdenum, chromium, nickel, and nitrogen content for improved resistance to pitting, crevice corrosion, chloride attack, and seawater exposure.
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.02 Max |
| Manganese (Mn) | 1.00 Max |
| Silicon (Si) | 0.80 Max |
| Sulfur (S) | 0.01 Max |
| Copper (Cu) | 0.5 – 1.0 |
| Nickel (Ni) | 17.5 – 18.5 |
| Chromium (Cr) | 19.5 – 20.5 |
| Nitrogen (N) | 0.18 – 0.22 |
| Molybdenum (Mo) | 6.0 – 6.5 |
| Phosphorus (P) | 0.03 Max |
SMO 254 Corrosion Resistance
SMO 254 fasteners are designed for aggressive chloride, seawater, and chemical environments where pitting and crevice corrosion can affect conventional stainless steel grades.
| Corrosion Environment | SMO 254 Performance |
|---|---|
| Chloride Pitting | Excellent |
| Crevice Corrosion | Excellent |
| Seawater Exposure | Excellent |
| Stress Corrosion Cracking | Excellent |
| Chemical Processing | Excellent |
| Acidic Environments | Very Good |
Equivalent Grades of SMO 254 Fasteners
SMO 254 is identified under several international designations for global procurement and engineering applications.
| Standard | Grade |
|---|---|
| UNS | S31254 |
| Werkstoff No. | 1.4547 |
| JIS | 2378 |
| Trade Name | 6MO |
Types of SMO 254 Fasteners
Aurum Overseas supplies SMO 254 and 6MO fasteners in various configurations for marine, offshore, desalination, chemical, and industrial projects.
Hex Bolts
Nuts
Screws
Threaded Bars
Washers
Stud Bolts
Thread Standards and Size Range
| Parameter | Range |
|---|---|
| Metric Sizes | M3 to M56 |
| Imperial Sizes | 3/16" to 2"+ |
| Thread Types | UNC, UNF, Metric, BSW |
| Rod Length | Up to 5 meters |
| Manufacturing | Rolled and Cut Threads |
| Finish Options | Plain, Polished, PTFE Coated |
Custom SMO 254 fasteners can also be supplied according to project drawings, dimensions, tolerances, and application requirements.
SMO 254 vs SS 904L Fasteners
Both SMO 254 Fasteners and SS 904L Fasteners are used in demanding corrosion-resistant applications, but their performance advantages differ. SMO 254 offers higher molybdenum content and is particularly suited to aggressive chloride and seawater environments.
SS 904L provides excellent resistance to acidic environments and offers a strong balance of corrosion performance and cost. Material selection should consider chloride concentration, acid exposure, operating conditions, and project requirements.
| Property | SS 904L Fasteners | SMO 254 Fasteners |
|---|---|---|
| UNS Number | N08904 | S31254 |
| Chromium (%) | 19 – 23 | 19.5 – 20.5 |
| Nickel (%) | 23 – 28 | 17.5 – 18.5 |
| Molybdenum (%) | 4 – 5 | 6 – 6.5 |
| Tensile Strength | 490 MPa Min | 650 MPa Min |
| Yield Strength | 220 MPa Min | 300 MPa Min |
| Seawater Resistance | Very Good | Excellent |
| Chloride Resistance | Very Good | Excellent |
| Acid Resistance | Excellent | Excellent |
| Desalination Applications | Suitable | Highly Preferred |
| Offshore Applications | Suitable | Highly Preferred |
When to Choose SS 904L Fasteners
SS 904L fasteners are suitable for acid processing, chemical plants, heat exchangers, and industrial piping where strong corrosion resistance is required with controlled material cost.
When to Choose SMO 254 Fasteners
SMO 254 fasteners are preferred for seawater, desalination, offshore, and high-chloride applications where superior resistance to pitting and crevice corrosion is critical.
Industries Served
SMO 254 fasteners are used in industries requiring reliable performance against chlorides, seawater, aggressive chemicals, and localized corrosion.
| Industry | Typical Applications |
|---|---|
| Offshore & Marine | Offshore platforms, shipbuilding, seawater systems |
| Desalination Plants | Reverse osmosis and seawater treatment |
| Chemical Processing | Reactors, tanks, heat exchangers |
| Oil & Gas | Refineries, pipelines, offshore equipment |
| Petrochemical | Processing plants and chemical systems |
| Power Generation | Boilers, turbines, energy infrastructure |
| Pulp & Paper | Bleaching and chemical processing |
| Water Treatment | Industrial water handling systems |
Global Export Markets
Aurum Overseas supplies SMO 254 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
SMO 254 Testing & Certification
SMO 254 fasteners can be supplied with inspection and certification documents to support marine, offshore, desalination, chemical, and industrial project requirements.
| Inspection / Certification | Availability |
|---|---|
| PMI Testing | Available |
| Tensile Testing | Available |
| Hardness Testing | Available |
| IGC Testing | Available |
| Dimensional Inspection | Available |
| EN 10204 3.1 | Available |
| EN 10204 3.2 | Available |
| Mill Test Certificates | Available |
| Heat Number Traceability | Available |
| Third-Party Inspection | Available |
Export Packaging & Logistics
SMO 254 fasteners are packed using sealed cartons, moisture-resistant wrapping, fumigated wooden crates, and customized export packaging to reduce contamination and transit damage.
Aurum Overseas supports international shipments with packing lists, inspection records, material certificates, traceability documents, and export logistics for EPC and industrial projects.
Why Choose Aurum Overseas for SMO 254 Fasteners
Aurum Overseas supplies SMO 254 and 6MO fasteners for offshore, marine, desalination, chemical processing, oil & gas, and power generation applications.
Material traceability, inspection documentation, custom manufacturing, certified quality, and international logistics support help meet the requirements of EPC contractors, plant operators, manufacturers, and industrial buyers.
Stainless Steel Fasteners for Marine and Chemical Applications
SMO 254 fasteners are selected for high-chloride, seawater, offshore, and aggressive chemical environments where superior pitting and crevice corrosion resistance is required.
For acidic processing applications, SS 904L Fasteners provide excellent corrosion resistance, while SS 316L Fasteners are suitable for many general marine, food-processing, and industrial applications. Aurum Overseas supplies a range of stainless steel fastener grades to suit different operating conditions.
FAQs
SMO 254 Fasteners are used in highly corrosive environments where superior resistance to pitting, crevice corrosion, and chloride attack is required. They are commonly used in marine, offshore, desalination, chemical processing, and oil & gas industries.
SMO 254 and 6MO Fasteners refer to the same alloy material. The term 6MO is derived from the alloy's approximately 6% molybdenum content, which provides exceptional corrosion resistance.
Yes, SMO 254 Fasteners offer higher mechanical strength and significantly better resistance to chloride-induced corrosion compared to SS 316 Fasteners.
Yes, we export SMO 254 and 6MO Fasteners to UAE, Saudi Arabia, Qatar, Kuwait, Oman, and Bahrain with secure packaging, export documentation, and timely delivery.
Yes, our fasteners are manufactured according to ASTM, DIN, BS, and other recognized international standards with complete material traceability.
Yes, Aurum Overseas supplies SMO 254 Fasteners to customers across the USA, including major industrial regions such as Houston, New York, Chicago, and Los Angeles. Our fasteners are supplied with complete material traceability and inspection documentation.
Request a Quote for SMO 254 Fasteners
Looking for a dependable SMO 254 Fasteners Supplier for offshore, marine, desalination, or chemical processing applications? Aurum Overseas provides high-performance fastening solutions with certified material, custom manufacturing, inspection documentation, and global export support.
Contact our team with your required grade, sizes, quantities, standards, and delivery requirements for a detailed quotation.
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