The Importance of Nickel Alloy 400 Tubing: A Complete Guide

The Importance of Nickel Alloy 400 Tubing: A Complete Guide

There are several advantages to using Nickel alloy 400 tubing for various applications. This metal displays excellent mechanical properties in subzero temperatures.

Nickel alloy 400 tubings are also highly resistant to corrosion even at temperatures over 1000 degrees Fahrenheit. Although its melting point ranges between 2370 and 2460 degrees F, it is weak at annealed state. Hence, its strength can be increased by annealing it at different temperatures.

Nickel alloy 400 tubing also performs well in seawater. This metal is highly resistant to cavitation corrosion, and it is also capable of undergoing treatment with up to 15% sulfuric acid at boiling temperatures. 


Nickel alloy is used in a variety of applications. In the chemical and marine industries, it is commonly used in valves, pumps, propeller shafts, electrical components, and other industrial processes. It is resistant to most acids and salts and corrosion-resistant at normal temperatures. It is susceptible to attack by sulfur-bearing gasses and molten sulfur but does not degrade rapidly.

Typical fabrication operations for alloy 400 tubing involve heat treating the material to between 1200 and 2250 degrees Fahrenheit. Then, the material is cold-worked or processed in a machining process. The alloy can also undergo heat treatment using stress equalizing, which increases yield strength and other properties. The process requires slow cooling and is effective in enhancing yield strength.


The Nickel alloy 400 tubing has superior resistance to marine environments. Manufacturers recommend this alloy for use in coastal areas where seawater vapor settles and contains trace amounts of salt. These salts can build up in the form of a deposition. In coastal areas, copper and other base metals are susceptible to corrosion.

These pipes are made from high-quality nickel alloys. Nickel alloys can withstand extremely high temperatures. The material is also malleable and can be machined into tubes and pipes. Depending on the desired characteristics, this material is often used for chemical manufacturing. It is also used in aircraft systems and oil exploration.

Mechanical properties

The mechanical properties of Nickel alloy 400 tubings are excellent at both elevated and subzero temperatures. It has a melting point of 2370-2460 deg F, making it ideal for many applications, but its strength is weak in its annealed state. However, mechanical properties can be significantly improved with a wide temperature range. Alloy 400 tubing is also excellent in saltwater, with greater resistance to cavitation corrosion. It can also be treated with up to 15% sulfuric acid at boiling temperatures.


When purchasing nickel alloy 400 tubings, you must know what to expect. This alloy has a melting point of 1350 degrees Celsius and is used for applications requiring elevated temperatures. Nickel alloy 400 tubing is available in seamless, welded, and fabricated forms. It is classified as ASTM B165 and ASTM B725 and is sold in several sizes. 

Final Take

The price of Nickel alloy 400 tubing varies, but you will save money by choosing the Nickel alloy 400 instead of the stainless steel version. This alloy is more cost-effective and can be hardened in hot or cold processes, making it a good choice for marine applications. The alloy 400 is available in a wide range of thicknesses, and its flexibility allows for multiple design options. Unlike stainless steel, nickel alloy pipes and tubing are versatile and can be easily machined to fit your exact specifications. Contact 1-800-264-7833 to get more information!