NM400 steel weldability
[login to view URL] is an alloy steel containing chromium, molybdenum and nickel, released by the Shougang Xingcheng Special Steel Office on the 23rd October, 2020.NM400 steel is renowned for its weldability and its excellent properties make it a great choice for various applications such as shipbuilding, engineering machinery and offshore oil & gas operations.
NM400 steel is generally known as an alloy steel grade which is specifically designed for its exceptional wear resistance, excellent formability and superior weldability. This steel has been developed to resist wear and tear in various environments and under various conditions, in addition to its superior resistance to abrasion and wear.
The main difference between NM400 steel and other steels is its weldability. NM400 steel has incredible welding characteristics and can be used for welding in numerous ways, including gas, arc and resistance welding. These processes are carried out without compromising strength and ductility, making it an ideal choice for many applications.
Although NM400 steel is very strong and has excellent weldability, there are some things that should be considered when working with the alloy in welding applications. Firstly, it is important to ensure that preheating and postheating processes are carried out correctly and at recommended temperatures to prevent cracking and ensure a smoother weld. Also, as with any and all types of welding, proper joint preparation is essential, and adequate ventilation and cooling should also be considered for maximum weld integrity.
Furthermore, consumables should be carefully selected depending on the thickness of the material being welded. If thinner materials are being welded, flux-cored wires and metal-cored wires are viable options as they provide good operational performance and are less likely to result in hydrogen-induced cracking compared to solid wires.
The fierce capabilities of NM400 steel make it an incredibly popular choice for challenging applications. Its excellent weldability and ability to survive in harsh environments mean it is a wise choice for any application that requires wear resistance and longevity when exposed to the elements. Utilising the correct welding methods, consumables and pre and post-heating processes are all important steps to ensuring the finished weld is of excellent quality and can be trusted.
