Calico Metal Alloys LLP is a prominent supplier and exporter of AL6XN Pipes in India. We are known for providing top-tier industrial materials with unparalleled performance, such as AL6XN Pipes. As experts in quality metal products such as these AL6XN pipes for various uses, we pride ourselves on customer satisfaction as part of our dedication to excellence! We have decades of experience offering AL6XN pipes to businesses all across the nation.

We take great pride in producing pipes of only the highest quality standards. Each pipe undergoes stringent testing and inspection processes to ensure compliance with industry specifications and customer needs, and precision engineering ensures products that surpass expectations in terms of performance, longevity, and reliability - making us the choice of customers looking for excellence in this arena.

In addition to quality assurance, we offer unparalleled customer support and service. From prompt order processing to timely delivery and post-sales assistance, we prioritize customer satisfaction at every step of the process. With a team of experienced professionals and a commitment to excellence, we continue to set the benchmark for quality in the supply of AL6XN Pipes in India, earning the trust and loyalty of clients nationwide.

AL6XN Pipes

Manufacturing Process Of AL6XN Pipes

Rolling and Welding

The strips pass through the number of rollers as per the required size. In the tubes-mill, the strip is gradually converted into the tubular shape. The fitted welding machine is then used to weld trim edges of the strip using TIG welding process.

Length Cutting

Rolled pipes and tubes thus manufactured are cut to the required lengths depending upon the industrial demand. We use a variety of methods—sawing, lathe cutting, rotary cutting, supported shear cutting, dual-blade shear cutting, and laser cutting.

Cleaning and Heating Phase

Subjected to cleaning to remove the dirt. Further, a heat treatment is given to these rolled pipes and tubes to remove the stresses that may occur due to welding and formation processes. Heat treatment is given on the continuously rolling hearth furnace.

Cold Drawing Process

Required size may not be obtained from the mill directly. Then, the cold operation process can be used to obtain the desired size. In the cold drawing process, the tube or pipe is drawn over the bench using Die plugs.

Finishing Process

Pipe and tubes are then subjected to cleaning, heat treatment, pickling and straightening. The computerized ink jet marking machine then mark the finished pipes or tubes. Then they marked with grade of material, size, heat number.

What Are AL6XN Pipes?

AL6XN is a high-performance austenitic stainless steel alloy known for its exceptional corrosion resistance in aggressive environments, including chloride-containing solutions. AL6XN pipes are commonly used in industries such as chemical processing, pulp and paper, and marine engineering due to their resistance to pitting, crevice corrosion, and stress corrosion cracking. These pipes offer excellent strength and durability, making them suitable for demanding applications where corrosion resistance is critical.

AL6XN Pipe Specifications and Sizes

AL6XN is a high-performance austenitic stainless steel known for its excellent corrosion resistance in harsh environments. Pipes made from AL6XN typically come in a variety of sizes ranging from 1/2 inch to 12 inches in diameter, with standard lengths of 20 feet. These pipes are often used in industries such as chemical processing, pulp and paper production, and seawater desalination due to their resistance to corrosion, pitting, and chloride stress cracking. AL6XN pipes adhere to ASTM specifications, notably ASTM B676 for welded pipes and ASTM B622 for seamless pipes.

AL6XN Pipe Standards ASME SB-269, ASME SB-270
Seamless Pipe Size 3.35 mm OD To 101.6 mm OD
AL6XN Welded Pipe Size 6.35 mm OD To 152 mm OD
Swg & Bwg 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg.
AL6XN tubing wall thickness 0.020" –0.220", (special wall thicknesses available)
Alloy Pipe Length Single Random, Double Random, Standard & Cut length
AL6XN Alloy Pipe Finish Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF
Value Added Service Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc.
Form Round, Coil, Square, Rectangular, Boiler, Hydraulic, Straight or ‘U’ bent Pipes, Hollow, LSAW Pipes Etc.
AL6XN Pipe Type Seamless, ERW, EFW, Welded, Fabricated
End Plain End, Beveled End, Treaded
Marking All AL6XN Alloy Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer’s request.)
Application Oil Pipe, Gas Pipe, Fluid Pipe, Boiler and Heatexchanger
Specialize in AL6XN Capillary Pipe & Other Odd Size
AL6XN Heat Exchanger & Condenser Pipes

Special Features of AL6XN Stainless Steel Tubing

  • AL6XN Gas Pipe are high strength and toughness
  • ASME coverage up to 800° F
  • Excellent resistance to pitting and crevice corrosion in chloride solutions
  • Practical immunity to stress corrosion cracking in NaCl environments
  • AL6XN Exhaust Pipe is 50% stronger than stainless steel
  • ASME coverage up to 800° F
  • AL6XN welded Pipe can be welded easily
Test Certificate Manufacturer Test Certificate
Laboratory Test Certificate from Govt. Approved Lab.
Under Third Party Inspection

Types Of AL6XN Pipes


AL6XN Seamless Pipe


AL6XN Welded Pipe






AL6XN Square Pipe


AL6XN Round Pipe


Other Types Of AL6XN Pipes

Alloy 25-6HN Pipes AL6XN Welded Pipe
AL6XN Thick Wall Pipe AL-6XN Industrial Pipes
Alloy 25-6HN Seamless Pipe AL6XN Seamless Pipes
AL6XN Pipes AL-6XN Pipe
AL-6XN Square Pipe AL6XN Rectangular Pipes
ASME SB269 AL6XN Pipe ASTM B269 AL6XN Pipes
AL6XN Polished Pipes AL6XN Cold Drawn Pipe
AL6XN Schedule 40 Pipe Alloy 25-6HN Pipe

AL6XN Pipe Equivalent Grade

AL-6XN is a high performance austenitic stainless steel alloy typically utilized in demanding environments like chemical processing, marine applications and pulp and paper industries. The alloy's equivalent grades include UNS N08367 and ASTM A182 F62 and its exceptional corrosion resistance is well known; AL6XN offers superior strength and durability even under highly corrosive environments making it the go-to material in critical applications where reliability and dependability is of utmost importance. In addition, its excellent weldability and formability further expand its suitability across a broad spectrum of industrial applications.

Material number EN UNS
1.4529 X1NiCrMoCuN25-20-7 N08367

Chemical composition of AL6XN Pipes

AL6XN pipes are well known for their exceptional corrosion resistance in harsh environments. Their composition typically contains high levels of nickel (24-26%), chromium (20-22%), molybdenum (6-7%) and nitrogen (0.18-0.25%). In addition to this high metal content is smaller amounts of iron manganese silicon copper carbon phosphorus sulfur and nitrogen which give these AL6XN pipes excellent chloride pitting crevice corrosion and stress corrosion cracking resistance that make them perfect applications in chemical processing marine environments or pulp and paper industries.

C S Cr Mn Ni P N Mo Cu Si
0.03 Max 0.03 Max 20.00-22.00 2.0 Max 23.5-25.5 .040 Max 0.18-0.25 6.00-7.00 0.75 Max 1.00 Max

Mechanical Properties of AL6XN Pipes

AL6XN pipes are high-strength corrosion-resistant alloys composed of nickel, chromium, molybdenum and nitrogen that have excellent mechanical properties such as high tensile strength of approximately 110ksi (758MPa), excellent yield strength at 50ksi (345 MPa) yield strength, notable elongation at 35% and impact toughness making this material suitable for demanding industries including chemical processing, marine environments and pulp and paper production - making AL6XN pipes perfect materials used to manufacture pipes to provide durability in harsh operating environments.

Elongation in 2”, percent Temp. °F (°;C) Ult. Tensile Strength, psi .2% Yield Strength, psi Charpy V-Notch Toughness, ft-lb
36 -450 (-268) 218,000 142,000 353*
49 -320 (-196) 196,000 107,000 85
- -200 (-129) - - 100
47 70 (21) 108,000 53,000 140
47 200 (93) 99,900 49,400 -
46 400 (204) 903,000 40,400 -
47 600 (316) 86,000 36,300 -
48 800 (427) 87,000 36,000 -

Applications of AL6XN Pipes

AL6XN pipes are made from high performance austenitic stainless steel that offers exceptional corrosion resistance in aggressive environments. As such, AL6XN finds uses across numerous industries where durability, corrosion resistance, strength and corrosion protection are crucial factors; some common applications for this material include:

Chemical Processing: AL6XN pipes are widely utilized by chemical processing facilities for handling highly corrosive chemicals such as acids and solvents that erode metal pipes quickly - such as sulfuric acid, nitric acid, phosphoric acid solutions or chloride solutions - without incurring corrosion issues.

Oil and Gas Sector: In the oil and gas sector, AL6XN pipes are utilized in offshore platforms, pipelines, and processing facilities where exposure to corrosive environments, such as seawater and acidic gases, is prevalent. They offer excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.

Pharmaceutical Industry: AL6XN pipes are commonly utilized by pharmaceutical manufacturers for transporting hazardous substances such as acidic chemicals and solvents as well as active pharmaceutical ingredients that require special handling to remain pure and free from contamination. Their corrosion resistant surface guarantees product purity while resisting potential corrosion issues that might otherwise arise during processing and manufacturing processes.

Water Treatment: AL6XN pipes are widely utilized by water treatment facilities to handle harsh chemical environments, including disinfection, pH adjustment and wastewater treatment processes. Their durability and reliability provide durability in harsh chemical environments.

Marine Applications: Due to their superior resistance to seawater corrosion, AL6XN pipes have found widespread application across marine applications including shipbuilding, offshore structures and intake/outfall systems.

Mining and Metal Processing: AL6XN pipes find widespread application in mining and metal processing operations that deal with harsh materials like acidic solutions or corrosive chemicals; in these operations corrosion and erosion resistance help extend service life under extreme circumstances.

Heat Exchangers and Pressure Vessels: AL6XN pipes are commonly utilized in heat exchangers and pressure vessels where corrosion resistance is key for optimizing operational performance and safety.

Overall, AL6XN pipes are selected due to their exceptional corrosion resistance, high strength, and versatility in various industrial applications.

Electrical Industry


Automotive Industry


Construction Industry


Defence Industry


Pharmaceutical Industry


Petroleum Industry


Petrochemical Industry


Milk & Dairy Industry

Milk & Dairy

Export & Supply Destinations Of AL6XN Pipes

Switzerland, Germany, Ukraine, Liechtenstein, Bulgaria, Turkey, Belarus, Greece, Belgium, Estonia, Latvia, Ireland, France, Moldova, Spain, Poland, Austria, Monaco, Malta, Luxembourg, Lithuania, Italy, Cyprus, United Kingdom, Hungary, Portugal, Norway, Romania, Finland, Netherlands, Slovakia, Serbia, Czechia/Czech Republic, Azerbaijan, Croatia, Russia, Sweden, Denmark.

Malaysia, Iraq, Bahrain, South Korea, Lebanon, Macau, Afghanistan, Oman, North Korea, Saudi Arabia, Turkey, Thailand, Azerbaijan, India, Bangladesh, Taiwan, Philippines, Mongolia, Nepal, Indonesia, British, Bhutan, United Arab Emirates, Singapore, Iran, Vietnam, Israel, Sri Lanka, Jordan, Russia, Myanmar, Kuwait, Armenia, Egypt, Qatar, China, Japan, Hong Kong, Maldives, Kyrgyzstan.

Kenya, Namibia, Mauritania, Mozambique, Ethiopia, Madagascar, Zimbabwe, Seychelles, Central African Republic, Angola, Rwanda, Zambia, Botswana, Burundi, Libya, Morocco, Senegal, Mauritius, Nigeria, Liberia, Eswatini, Gambia, Algeria, South Africa, Tunisia, Niger, Egypt, Cameroon, Uganda, Tanzania, Burkina Faso.

Haiti, El Salvador, Saint Lucia, Mexico, Canada, Belize, Trinidad and Tobago, Guatemala, Saint Vincent and the Grenadines, Costa Rica, Antigua and Barbuda, Dominican Republic, Honduras, Bahamas, Panama, Grenada, Cuba, Dominica, Jamaica, United States of America, Barbados, Nicaragua.

Argentina, Ecuador, Brazil, Paraguay, Chile, Bolivia, Venezuela, Uruguay, Colombia, Suriname, Peru, Guyana.