Unifit Fasteners manufactures high-performance AL6XN fasteners engineered from super austenitic stainless steel UNS N08367. AL6XN fasteners are manufactured from an alloy containing chromium, nickel and molybdenum with restricted carbon content, making them highly resistant to chloride stress corrosion cracking and pitting in seawater or chemical media. These properties make them ideal for aggressive environments where standard stainless grades fail, especially in offshore platforms, marine equipment, desalination systems, pulp & paper plants, and chemical processing facilities.
We carry a variety of AL6XN fasteners along with grades such as AISI 317, AISI 501 HT, AISI 409, AISI 420, AISI 446 and AISI 202, ensuring compatibility with diverse industrial applications. We supply AL6XN Fasteners at a reasonable price with reliable quality standards.
In addition to fasteners, we supply a complete range of AL6XN Pipe Flanges to suit various project requirements, machined from our in-house stock at affordable prices. We stock different types and sizes of semi-finished and finished AL6XN High Hub Flanges, AL6XN Loose Flanges, AL6XN Steel Threaded Flanges, AL6XN Flat Flanges, AL6XN Blind Flanges and AL6XN Orifice Flanges.
Each fastener receives thorough quality inspections such as tests of chemical composition, tensile and hardness tests and dimensional accuracy tests. Our manufacture is in line with the international standards like ASTM A182, ASME, DIN and customer specific technical datasheets.
By selecting us, one will be dealing with a supplier who has a reputation of excellence, punctuality and documentation. We provide AL6XN bolts, nuts, studs, washers, threaded rods and forged fasteners of special design which have a good fit, high durability, and long-term resistance to corrosion in critical application.
Request QuoteTable of Contents
- What are AL6XN Fasteners?
- Send Your Enquiry
- Types of AL6XN Fasteners
- AL6XN Fasteners Technical Specifications
- AL6XN Fasteners Equivalent Grades
- Chemical Composition of AL6XN Fasteners
- Mechanical Properties of AL6XN Fasteners
- Weight Chart of AL6XN Flanges
- Why Choose AL6XN Fasteners?
- Applications of AL6XN Fasteners
- AL6XN Fasteners Price
- Trusted Manufacturer & Supplier of AL6XN Fasteners
- Frequently Asked Questions About AL6XN Fasteners
What are AL6XN Fasteners?
Fasteners Fasteners are structural items like bolts, nuts, screws, studs, and washers produced utilising the AL6XN, which is a high-performance super duplex stainless steel alloy assigned as UNS N08367. It is a high chromium (2022) content (2022) nickel (2426) with molybdenum (67) and nitrogen (01822) alloy with superior chloride-induced stress corrosion cracking, pitting and crevice corrosion properties.
These rivets have outstanding mechanical and excellent corrosion resistance, thus becoming indispensable for application in aggressive chloride-containing weather such as seawater exposure, chemical plants and offshore structures. The AL6XN fasteners have strength and resist pressure, load cycles, and high temperatures, which guarantee safe and superior durability in vital assemblies during missions.
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Types of AL6XN Fasteners
AL6XN fasteners come in a variety of forms to meet diverse industrial requirements. Below is a summary of the key fastener types, their features, and common applications:
AL6XN Fasteners Technical Specifications
AL6XN fasteners should have the important specifications that make them fit and perform well. These fasteners are made out of a super austenitic stainless steel (UNS N08367) that is able to withstand high resistance in extreme conditions and have very high international standards. Their key properties will be summarised below so as to be chosen.
| Specification Parameter | Details |
|---|---|
| Material Grade | AL6XN (UNS N08367) |
| Standards | ASTM A182, ASTM A193, ASTM A194, DIN, ISO, ASME |
| Diameter Range | M1.6 to M100 or customized per requirement |
| Length | Up to 5 meters (custom lengths available) |
| Thread Types | Metric, UNC, UNF, BSW, Acme, custom threads |
| Finish / Coating | Plain, Passivated, PTFE Coated, Zinc Plated |
| Corrosion Resistance | Exceptional resistance to pitting, crevice, and chloride stress corrosion cracking |
| Temperature Range | Suitable from cryogenic to elevated temperatures |
| Manufacturing Process | Forged, Machined, Heat Treated |
AL6XN Fasteners Equivalent Grades
Understanding equivalent materials helps ensure compatibility in global projects:
| Standard / Specification | Equivalent Grade / Designation |
|---|---|
| UNS | N08367 |
| EN/DIN | 1.4565 |
| ASTM / ASME | A182 F55, A240, A276 |
| JIS | SUS 329J4L |
| ISO | X2CrNiMoN22-5-3 |
Chemical Composition of AL6XN Fasteners
AL6XN fasteners have a balanced chemical composition to provide high levels of corrosion resistance and mechanical strength. Chromium, nickel, molybdenum, and nitrogen are combined together to enhance toughness to withstand harsh environmental conditions. The elemental composition of this alloy is given below.
| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Manganese (Mn) | ≤ 1.50 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.015 |
| Silicon (Si) | ≤ 0.80 |
| Chromium (Cr) | 20.0 – 22.0 |
| Nickel (Ni) | 24.0 – 26.0 |
| Molybdenum (Mo) | 6.0 – 7.0 |
| Nitrogen (N) | 0.18 – 0.22 |
| Iron (Fe) | Balance |
Mechanical Properties of AL6XN Fasteners
The table below summarizes the key mechanical properties that make AL6XN fasteners ideal for critical industrial applications:
| Property | Value |
|---|---|
| Tensile Strength | ≥ 830 MPa |
| Yield Strength (0.2% Proof) | ≥ 450 MPa |
| Elongation | ≥ 25% |
| Hardness (Brinell) | ≤ 320 HB |
| Impact Toughness (Charpy V-notch) | High, including sub-zero temperatures |
| Modulus of Elasticity | ~ 200 GPa |
These properties ensure AL6XN fasteners can withstand mechanical stress, thermal cycling and harsh environmental conditions.
Weight Chart of AL6XN Flanges
AL6XN flanges are manufactured in multiple international standards and pressure classes. The table below shows the approximate weight and dimensional details for 15mm (1/2") AL6XN flanges, helping users select the right size based on bolt circle diameter, bolt hole size, and number of bolts.
| Standard / Specification | Pressure Class | Diameter (mm) | Bolt Circle Dia (mm) | No. of Bolts | Bolt Size | Bolt Hole Dia (mm) |
|---|---|---|---|---|---|---|
| AS4087 Flanges | PN14 | 95 | 67 | 4 | M12 | 14 |
| AS 2129 Flange | Table C | 95 | 67 | 4 | 13 | 14 |
| AS 2129 Flange | Table D | 95 | 67 | 4 | 13 | 14 |
| AS 2129 Flange | Table E | 95 | 67 | 4 | 13 | 14 |
| AS 2129 Flange | Table F | 95 | 67 | 4 | 13 | 14 |
| AS 2129 Flange | Table H | 114 | 83 | 4 | 16 | 17 |
| AS 2129 Flange | Table J | 114 | 83 | 4 | 16 | 17 |
| ANSI B16.5 Flanges | 150 | 89 | 60 | 4 | 13 | 16 |
| ANSI B16.5 Flanges | 300 | 95 | 67 | 4 | 13 | 16 |
| ANSI B16.5 Flanges | 600 | 95 | 67 | 4 | 13 | 16 |
| ANSI B16.5 Flanges | 900 | 121 | 83 | 4 | 19 | 22 |
| ANSI B16.5 Flanges | 1500 | 121 | 83 | 4 | 19 | 22 |
| ISO 7005 (DIN) Flange | PN6 | 80 | 55 | 4 | M10 | 11 |
| ISO 7005 (DIN) Flange | PN10 | 95 | 65 | 4 | M12 | 14 |
| ISO 7005 (DIN) Flange | PN16 | 95 | 65 | 4 | M12 | 14 |
| ISO 7005 (DIN) Flange | PN20 | 90 | 60.5 | 4 | M14 | 16 |
| ISO 7005 (DIN) Flange | PN25 | 95 | 65 | 4 | M12 | 14 |
| ISO 7005 (DIN) Flange | PN40 | 95 | 65 | 4 | M12 | 14 |
Why Choose AL6XN Fasteners?
AL6XN fasteners offer a premium solution for environments where extreme corrosion resistance and mechanical performance are critical. Featuring a Pitting Resistance Equivalent Number (PREN) typically above 40, AL6XN withstands aggressive chloride-rich conditions such as seawater, brine and harsh chemical media without compromising structural integrity.
Key benefits include:
- Superior resistance to pitting, crevice, and chloride stress corrosion cracking compared to standard duplex and austenitic stainless steels.
- High tensile strength and excellent fatigue resistance to endure dynamic and cyclic loads.
- Exceptional toughness at sub-zero temperatures ensures reliability in varied climates.
- Longevity that minimizes maintenance, downtime, and replacement costs in costly industrial settings.
These attributes make AL6XN fasteners the preferred choice for engineers and project managers demanding durability, safety and operational efficiency in critical infrastructure.
Applications of AL6XN Fasteners
AL6XN fasteners are specifically designed to perform reliably in some of the most challenging industrial environments. Below are the primary industries and uses where AL6XN fasteners deliver exceptional performance:
- Offshore & Marine Structures
- Chemical and Petrochemical Processing
- Desalination Plants
- Food and Beverage Processing
- Power Generation Equipment
- Pharmaceutical and Biotechnology Industries
AL6XN Fasteners Price
The price of AL6XN fasteners is influenced by factors such as fastener type, size, thread specifications, finish/coating, and order volume. Due to the high alloy content and demanding manufacturing process, AL6XN fasteners are priced higher than standard stainless steel grades like 304 or 316. However, their superior corrosion resistance and mechanical durability translate into reduced lifecycle costs by minimizing maintenance and replacements. When sourcing AL6XN fasteners, it is advisable to:
- Request detailed quotations covering material test certificates (MTC) and quality compliance.
- Compare pricing alongside performance and warranty assurances.
- Consider total cost of ownership rather than initial purchase price alone.
Trusted Manufacturer & Supplier of AL6XN Fasteners
At Unifit Fastener, we bring unmatched expertise in producing and delivering AL6XN fasteners that conform to stringent industry standards. Our state-of-the-art manufacturing facilities utilize advanced forging, machining, and heat-treatment processes to achieve precise dimensions and consistent material properties.
Each fastener undergoes thorough chemical analysis, mechanical testing, and dimensional inspection to meet ASTM A182, ASME SB479, and international specifications. Serving sectors including offshore, chemical, desalination, and heavy engineering, we pride ourselves on timely delivery, responsive technical support, and customized solutions tailored to your project requirements.
Partner with Unifit Fastener for dependable, long-lasting AL6XN fastening solutions backed by technical excellence and trusted global supply networks.
Request QuoteFrequently Asked Questions About AL6XN Fasteners
Where are AL6XN fasteners typically used?
They are widely used in offshore oil & gas, chemical processing, desalination plants, marine structures and other harsh environments requiring superior corrosion resistance and strength.
How does AL6XN compare to other stainless steels like 316 or 904L?
AL6XN offers significantly higher resistance to pitting, crevice corrosion and stress corrosion cracking than 316 and 904L making it suitable for more aggressive environments.
Can AL6XN fasteners be custom manufactured?
Yes, we offer custom sizes, thread types and finishes tailored to your specific project requirements.
What is the typical lead time for AL6XN fastener orders?
Lead times vary based on order size, specifications, and stock availability. Standard fasteners are usually delivered within 2-4 weeks while custom orders may take longer.
How do I maintain AL6XN fasteners for optimal performance?
Regular inspection and cleaning, avoiding exposure to incompatible chemicals, and proper installation ensure long-term durability.
Can you supply AL6XN fasteners for international projects?
Yes, we have a global supply chain and export capabilities to serve projects worldwide ensuring compliance with regional standards and delivery requirements.