H-beams are divided into hot-rolled H-beams and welded H-beams (H), and hot-rolled H-beams are divided into wide flange H-beams (HW), middle flange H-beams (HM) and narrow flange H-beams (HN).

HW is H-shaped steel height and flange width are basically equal; It is mainly used for steel core column in reinforced concrete frame structure column, also known as stiff steel column.

HM is H-shaped steel height and flange width ratio of roughly 1.33~~1.75 mainly in steel structure: used as steel frame column in the dynamic load bearing frame structure used as frame beam; For example, device platform

HN is H-shaped steel height and flange width ratio ≥2, mainly used in beams; The use of I-beams is equivalent to HN section steel.

Classification of austenitic stainless steel:

American standard pipe fittings (such as WP304, WP304L, WP316, WP316L, etc.)

American standard steel pipe (such as TP304, TP304L, TP316, TP316L, etc.)

American standard plate (such as 304, 304L, 316, 316L, etc.

American standard forgings (such as F304, F304L, F316, F316L, etc.) National standard pipe fittings (such as SF304, SF304L, SF316, SF316L, etc.)

National standard steel pipe (such as 06Cr19Ni10, 022Cr19N10, 06Cr17Ni12Mo2, etc.)

National standard forging parts (such as 06Cr19Ni10, 022Cr19Ni10, 06Cr17Ni12Mo2, etc.

European standard pipe fittings (e.g. 1.4301, 1.4307, 1.4401, 1.4948, etc.)

European standard forgings (e.g. 1.4307, 1.4401, 1.4948, etc.)