SA516 70 grade has the highest tensile and yield strength range due to the highest carbon content (up to 0.28%). For high-grade astm a573 grade 58 high strength structural steel sheet steel plates such as SA516 70 grade, especially thick steel plates need to be preheated during arc welding.
Q245R boiler steel plate introduction: Q is the first letter of "Qu" Chinese Pinyin; Number 245 is the yield strength value; R: is the first character of "Rong" Chinese Pinyin. Q245R steel is a special plate for pressure vessels and boilers with a yield strength of 245MPa. It has outstanding mechanical properties and processability. If you have special requirements, our company can supply Z15, Z25, Z35 and other Z performance tests.
Titanium microalloying is an element of astm a573 grade 58 high strength structural steel sheet strengthening complex with carbon and nitrogen. The addition of micro amount of titanium in the steel can fix almost all nitrogen and part carbon in the steel, so as to eliminate the strain aging phenomenon and improve the aging impact performance of the steel. At the same time, it can refine the grains and change the morphology of the compounds. According to the atomic weight ratio of Ti and N in astm a573 grade 58 high strength structural steel sheet tin formula (Ti = 3.4n), the content of Ti in steel should be controlled between 0.015 and 0.025%. Generally, the amount of ferrotitanium added to each ton of steel is 1kg.
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