Alloy 20 Pipes and Tubes are crafted to deliver exceptional corrosion resistance and mechanical stability in highly aggressive chemical environments. Manufactured from a specialized nickel-iron-chromium alloy known for its superior performance against sulfuric acid and other corrosive agents, these pipes and tubes are available in an extensive range of specifications including various diameters, wall thicknesses, lengths, and end connections. Custom fabrication options are also offered to meet project-specific requirements, ensuring optimal compatibility with industrial systems and operations.

This material, often referred to as a superalloy, demonstrates outstanding resistance to stress corrosion cracking, crevice corrosion, and pitting—especially in environments where conventional stainless steels may fail. Offered in both seamless and welded configurations, Alloy 20 Pipes and Tubes are manufactured in compliance with international quality benchmarks such as ASTM B729, ASTM B464, and ASME SB468. With reliable logistics and export capabilities, we ensure consistent supply across major regions including India, the United Arab Emirates (UAE), the Kingdom of Saudi Arabia (KSA), Kuwait, Qatar, the Sultanate of Oman, Iran, and Iraq.

Technical Overview

Alloy 20 (UNS N08020 / DIN 2.4660) is a nickel-chromium-iron-based austenitic alloy designed specifically to combat sulfuric acid corrosion. It contains key elements such as copper and molybdenum, which enhance its resistance to acidic and chloride-rich environments. Additionally, the presence of niobium stabilizes the alloy against intergranular corrosion, especially after welding or prolonged exposure to elevated temperatures. These properties make Alloy 20 an excellent choice for chemical processing environments and conditions that involve fluctuating pH levels or concentrated acid attacks.

Pipes and tubes made from Alloy 20 offer a unique combination of mechanical strength, ease of fabrication, and corrosion resistance. They perform effectively across a wide temperature range and are suitable for both hot and cold working processes. With superior weldability and formability, they meet the requirements of various critical systems, including those involving heat exchangers, pressure vessels, and piping networks. Each batch is tested rigorously through mechanical testing, hydrostatic inspection, and corrosion analysis to ensure full compliance with industry regulations and client specifications.

Applications & Industry Use

The versatility and durability of Alloy 20 Pipes and Tubes make them indispensable in industries where resistance to strong acids and harsh chemicals is essential. Key application areas include chemical processing, pharmaceuticals, food and beverage production, power generation, petrochemical refineries, and marine environments. Their ability to withstand corrosion from sulfuric, phosphoric, and nitric acids makes them especially useful in acid recovery units and high-purity chemical storage systems.

These pipes and tubes are also deployed in heat exchangers, condensers, reactors, and piping systems where contamination resistance and structural reliability are critical. In addition, they are often preferred in environments prone to chloride-induced corrosion such as desalination plants and offshore platforms. Backed by strong quality assurance protocols and global export capabilities, our supply of Alloy 20 Pipes and Tubes remains consistent across India, the Gulf region, and neighboring countries, providing reliable material solutions to industries operating under severe environmental and chemical stresses.

Alloy 20 Pipes and Tubes Equivalent Grades

STANDARD	WERKSTOFF NR.	UNS	AFNOR	EN
Alloy 20	2.4660	N08020	Z2NCUD31-20AZ	NiCr20CuMo

Alloy 20 Seamless Pipes

Carpenter 20, 20Cb-3 Seamless Pipes, UNS N08020 Seamless Pipes, DIN 2.4660 Seamless Pipes

Alloy 20 Seamless Tubes

Carpenter 20 Seamless Tube, UNS N08020 Seamless Tubing, DIN 2.4660 Seamless Tubes

Alloy 20 Welded Pipes

Carpenter® 20 Welded Pipes Supplier, UNS N08020 Welded Pipes, DIN 2.4660 Welded Pipe

Alloy 20 Welded Tubes

Incoloy® 20 Welded Tubing, UNS N08020 Welded Tube, ASME SB468 Nickel Alloy 20 Welded Tubing

Alloy 20 ERW Pipes

Alloy 20 ERW Pipe Supplier, Carpenter® 20 ERW Pipes, Alloy UNS N08020 ERW Pipes, DIN 2.4660 ERW Pipe

Alloy 20 ERW Tubes

UNS N08020 ERW Tube, DIN 2.4660 ERW Tubing, ASTM B468 Alloy 20 ERW Tubes, Carpenter 20Cb-3 ERW Tubes

Specifications :

ASTM B729, B464, B468/ ASME SB729, SB464, SB468

Pipe Range :

½”NB to 24”NB / SCH 10 – SCH XXS

Tubes Range: :

1mm OD to 254mm OD / Thickness 0.1 to 20mm.

Type :

Seamless / ERW / Welded / Fabricated Pipes

Form :

Round, Square, Rectangular, Oval, Hydraulic Etc

Length :

Single Random, Double Random & Required Length

End :

Plain End, Beveled End, Treaded

End Protection :

Plastic Caps

Delivery Condition :

Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

Inspection, Test Reports :

Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports

Packing :

Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests

Specials :

Sizes and Specifications other than above can be manufactured on request

Chemical Composition of Alloy 20 Pipes & Tubes