ASTM B688 UNS N08367 AL-6XN Plates

 

 

ASTM B688 UNS N08367 AL-6XN Plates are specifications for high-performance, corrosion-resistant plates made from AL-6XN alloy. AL-6XN is a superaustenitic stainless steel with high levels of nickel, chromium, molybdenum, and nitrogen, which provide exceptional resistance to corrosion, particularly in chloride-containing environments.

 

 

Common Types:

 

Hot Rolled Plates: Produced by rolling the ingot at high temperatures. They offer good surface finish and dimensional accuracy.

Cold Rolled Plates: Processed at room temperature, resulting in improved surface finish and tighter dimensional tolerances.

Annealed Plates: Heat treated to relieve internal stresses and improve mechanical properties.

Polished Plates: Subjected to mechanical or chemical polishing for enhanced surface smoothness and appearance.

 

Common Sizes:

 

Thickness: 0.1 mm - 50 mm

Width: Up to 2500 mm

Length: Up to 12000 mm

 

Chemical Composition (Typical):

 

Nickel (Ni): 24.0 - 26.0%

Chromium (Cr): 19.0 - 21.0%

Molybdenum (Mo): 6.0 - 7.0%

Copper (Cu): 0.75 - 1.50%

Nitrogen (N): 0.18 - 0.25%

Iron (Fe): Balance

Carbon (C): 0.03% max

Silicon (Si): 0.75% max

Manganese (Mn): 2.0% max

Phosphorus (P): 0.04% max

Sulfur (S): 0.03% max

 

Mechanical Requirements:

 

Tensile Strength: 100 ksi (690 MPa) min

Yield Strength (0.2% offset): 43 ksi (300 MPa) min

Elongation: 35% min

Hardness: HRB 95 max

 

Applications:

 

AL-6XN plates find widespread use in industries requiring exceptional corrosion resistance, such as chemical processing, pulp and paper, food processing, pharmaceuticals, and marine engineering.

Common applications include pressure vessels, heat exchangers, piping systems, tanks, valves, pumps, and other equipment subjected to corrosive environments.

 

 

Q&A:

 

Q: What makes AL-6XN plates suitable for corrosive environments?

A: AL-6XN offers superior corrosion resistance in a wide range of aggressive media, including chloride-containing environments like seawater and acidic solutions. Its high nickel, chromium, and molybdenum content contribute to its exceptional corrosion resistance.

 

Q: Can AL-6XN plates be welded?

A: Yes, AL-6XN is readily weldable using common welding techniques. It exhibits good weldability and retains its corrosion resistance in the welded area, making it suitable for fabricating complex structures and equipment.

 

Q: What are the limitations of AL-6XN?

A: While AL-6XN offers excellent corrosion resistance, it may not be suitable for extremely high-temperature applications exceeding 1000°F (538°C). Additionally, it may not be cost-effective for non-corrosive applications due to its higher alloying elements.

 

Q: How does AL-6XN compare to other stainless steels?

A: AL-6XN offers superior corrosion resistance compared to conventional austenitic and duplex stainless steels, particularly in chloride-rich environments. It also exhibits higher strength and toughness than many stainless steels.

 

Q: Can AL-6XN plates be used in seawater applications?

A: Yes, AL-6XN is widely used in marine engineering applications due to its excellent resistance to corrosion in seawater and brine, making it suitable for seawater desalination, offshore platforms, and shipbuilding.

 

AL-6XN plates are highly versatile and offer exceptional corrosion resistance, mechanical properties, and weldability, making them ideal for critical applications in corrosive environments across various industries. Proper material selection and fabrication techniques are essential to maximize the performance and longevity of AL-6XN components.

Hot Tags: astm b688 uns n08367 al-6xn plates, China astm b688 uns n08367 al-6xn plates manufacturers, suppliers, factory, 254 smo round bar, 90 10 copper nickel sheet, 316 stainless steel plate, sa 387 gr 22 plate, Steel Plate, Alloy Steel Pipes