Hexagon: opposite side * opposite side *0.0069= weight per meter.

Diameter× diameter× 0.00609 = kg/m (applicable to 410 420 420 J2 430 431)

For example: 50 50× 50× 0.00609 =15.23kg/m.

Diameter× diameter× 0.00623 = kg/m (applicable to 301303304316316l321)

For example: 50 50× 50× 0.00623 =15.575 kg/m.

Stainless steel is the abbreviation of stainless and acid-resistant steel, and steel or stainless steel resistant to weak corrosive media such as air, steam and water is called stainless steel. Steel resistant to chemical corrosive media (acid, alkali, salt and other chemical corrosion) is called acid-resistant steel.

Historical origin:

The invention and use of stainless steel can be traced back to the First World War. Henry buhrer, a British scientist, was commissioned by the British military arsenal to study the improvement of weapons. At that time, the rifle bore used by soldiers was very easy to wear, and buhrer wanted to invent an alloy steel that was not easy to wear.

Main types:

Stainless steel is usually divided into martensite steel, ferrite steel, austenite steel, austenite-ferrite (duplex) stainless steel and precipitation hardening stainless steel. In addition, it can also be divided into chromium stainless steel, chromium nickel stainless steel and chromium manganese nitrogen stainless steel. There is also a special stainless steel for pressure vessels, GB245 1 1_2009_ Stainless steel plate and strip for pressure equipment.