ST12 is German standard (DIN1623), It's ordinary cold rolled steel. In principle, ST12 can only be bent and formed, and no stamping is allowed.

AH36 steel plate is a steel plate with a thickness of no more than 150 mm for the manufacture of ocean going, coastal and inland navigation ships, fishing boats and offshore engineering structures. For steel plates with Z-direction requirements, add Z25 and Z35 to the suffix, which is used as structural steel for high-strength ships and offshore engineering.

NM500 steel plate is a high-strength wear-resistant steel plate with high wear resistance. NM500 wear-resistant steel plate is widely used in engineering machinery, environmental protection machinery, metallurgical machinery, abrasives, bearings and other product parts.

The better weldability also makes 4130 Carbon Steel Pipe a popular choice in the aerospace industry, which is used to manufacture commercial and military aircraft components requiring high strength and low weight. Examples include gears, piston pins, etc. Other uses of 4130 steel include auto parts, cutting tools and drilling machines.