Another difference between the two series is that the stainless steel of the 300 series belongs to the austenitic class, while the 400 belongs to the martensitic class. This means that the microstructure of the two grades is different from each other, and therefore the mechanics and properties will be different.

The procurement categories of stainless steel profiles are divided into pipe (square pipe, round pipe, industrial pipe (seam, seamless), decorative pipe, anti-fingerprint, health grade, food grade), round steel (light element, black rod), flat steel, Angle steel, square steel, hexagonal bar, channel steel (cold drawn, pickling), stainless steel microwire, coil wire, stainless steel flange, etc.

316L stainless steel, as a low-carbon series of 316 steel, has the same characteristics as 316 steel, and its resistance to grain boundary corrosion is excellent. The scope of application is the product with special requirements for resistance to grain boundary corrosion.

Alloying elements have different effects on the properties of steel, sometimes beneficial and sometimes harmful. Choosing the composition or grade of a steel often requires the designer or materials engineer to sacrifice some of one property for the maximum of another.

The harmful elements mainly refer to sulfur, phosphorus, lead, chromium 6 and so on. As for the surface treatment, it is not a means of differentiation, it is just a process, the internal and external surface finish is high, and the medium adhesion is rarely conducive to corrosion resistance.

The tension will affect the stress state, and can change the metal deformation resistance of the stainless steel strip, and further cause the thickness of the stainless steel strip to change. In addition to the thickness of the stainless steel lead and tail, the change in tension will also affect the thickness of other parts of the stainless steel belt.

First of all, the composition is different, titanium alloy is composed of titanium and other elements combined into an alloy, and stainless steel this is made of steam, water, air and so on. Secondly, the performance is different, the strength of titanium alloy will be higher, the corrosion resistance is also better, and the stainless steel has weldability, corrosion resistance and so on.

Steel containing more than 12.5% chromium in steel, with a high resistance to external media (acid, alkali salt) corrosion of steel, called stainless steel. According to the structure of the steel, stainless steel can be divided into martensitic, ferritic, austenitic, ferritic-austenitic, precipitation-hardened stainless steel, according to the national standard GB3280-92, a total of 55 provisions.