Main Products


COSASTEEL was established in 2006, located in China, which is steel coil manufacturer and supplier and factory. We manufacture galvanized steel sheet in coil, pre painted galvanized steel coil, galvalume steel coil, prepainted aluminum coil. An annual output of 800,000 tons of steel coils.



ASTM and ASTM A53 American material standards are systematic and complete. The standard, represented by ASTM, specifies applicable objects, types of raw materials, chemical composition,

Read More »

Pipe weight chart

Theoretical steel pipe weight The theoretical weight of the steel pipe is calculated based on the nominal diameter and density of the steel pipe (in

Read More »

Steel pipe size chart

Standard steel pipe sizes (DN/NPS) Generally, the diameter of the steel pipe can be divided into outer diameter, inner diameter, and nominal diameter. The outside diameter of

Read More »

Sheet Metal Gauge Chart

Gauge, inch and mm are commonly used thickness units for sheet metal, gauge and inch are generally used by people in the United Kingdom and

Read More »