Do you know about seamless boiler tubes 20G and SA-210C (25MnG)? 20G is a steel grade listed in GB/T5310 (corresponding foreign grades: st45.8 in Germany, STB42 in Japan, SA106B in the United States), and is the most commonly used steel for boiler steel pipes. Nws cov tshuaj muaj pes tsawg leeg thiab tshuab...
Nyeem ntxiv