Stainless steel I-beams are made of 201(1Cr17Ni5Mn6N), 202(2 Cr13Mn9Ni4), 301(1 Cr17Ni7), 303(Y1Cr18Ni9), 304(OCr18Ni9), 304L (03 Cr19Ni10), 316(0 Cr17Ni12Mo2), 316L(00 Cr17Ni14Mo2), 321 (1 Cr18Ni9Ti), 420( 2cr13), 310S(0 Cr25Ni20), etc. The chemical composition of stainless steel I-beams belongs to general structural rolled steel series, the main test indexes were C, Mn, P and S. According to different grades, the content varies, the approximate range is C<0.08%, Mn: 2.0, P<0.035%, S<0.03%. Materials are widely used in hardware products, medical machinery, food machinery, ships, automobiles, doors and windows, furniture, large machinery, etc.

I-beam is mainly divided into ordinary I-beam, light I-beam and low alloy light I-beam. Ordinary I-beam and light I-beam flanges are thick on the web plate and thin on the outside. Ordinary I-beam, light I-beam, because the cross-sectional dimensions are relatively high, narrow, so the section of the two main sleeve moment of inertia difference is large, which makes it in the scope of application has a great limitation. The use of I-beam shall be selected according to the requirements of the design drawings.

Hot-dip galvanized I-steel is also called hot-dip galvanized I-steel or hot-dip galvanized I-steel. It is to immerse the I-beam after derusting into molten zinc at about 500 ℃ to attach a zinc layer to the surface of the I-beam, thus achieving the purpose of anti-corrosion. It is suitable for strong corrosive environments such as various strong acids and alkali fogs.