Stainless Steel Knowledge: The Difference between 630 Stainless Steel and 631 Stainless Steel!

In daily life, we often see many products related to stainless steel. For example, common items include pots, bowls, cups, anti-theft doors, windows, and so on. The types of stainless steel used for different stainless steel products are also different. Today, let's take a look at the differences between 630 stainless steel and 631 stainless steel.

Regarding 630 stainless steel, it belongs to the American standard precipitation hardening martensitic stainless steel. 630 stainless steel has high strength and hardness, as well as excellent corrosion resistance. It has good processing performance and can be age hardened through one-time low-temperature treatment. It can be used for various purposes, including valve components in the petroleum industry, chemical process equipment, aircraft parts, fasteners, pump shafts, nuclear reaction components, gears, paper machine equipment, missile accessories, and jet engine components.

Regarding 631 stainless steel, it also belongs to the American standard precipitation hardening martensitic stainless steel. 631 stainless steel is a dispersion hardening stainless steel with high strength, high hardness, fatigue resistance, good corrosion resistance and die forging ability, as well as high temperature and minimal deformation. This steel has good performance and has been widely promoted and used in valves, shafts, chemical fiber industries, and high-strength components with certain corrosion resistance requirements.

630 stainless steel and 631 stainless steel, both belong to precipitation hardening stainless steel. They can meet the requirements of high temperature resistance and have strong tensile strength because their chemical composition contains precipitation hardening elements such as aluminum. The product features stable elasticity and the strongest tensile strength, and its fatigue resistance is the strongest in the stainless steel series.