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ASTM A500 straight seam submerged arc welded steel pipe is a straight seam steel pipe manufactured using the submerged arc welding process, and its standard complies with ASTM A500.

ASTM A213 Stainless Steel 304H Boiler Tubes has general corrosion resistance similar to the low carbon 304/304L.

‌EN 10083-2 C45E‌ is a medium carbon steel with high strength and hardness. It is suitable for manufacturing some mechanical parts that require high strength and wear resistance, such as shafts, gears, hubs, etc.

A335 P9 seamless pipe is a high performance alloy steel pipe, mainly used in high temperature and high pressure environment.