45# steel is high-quality carbon structural steel with low hardness and easy cutting. After quenching and tempering, the SA283 Gr.C steel tensile strength parts have good comprehensive mechanical properties. 45# steel is widely used in motorcycles and automobiles, especially those connecting rods, bolts, gears and shafts that work under alternating loads, huge friction, usually quenching method to improve its own hardness, wear resistance and service life.
Difference between Q235A steel and Q235B steel plates:
in the national standard GB700, the difference between , Q235A steel and Q235B steel plates is mainly in the carbon content. In addition, Q235A steel plate does not do impact test, while Q235B Q235B steel plates need normal temperature impact test, V-notch. Relatively speaking, the mechanical properties of Q235B steel plates are better than that of Q235A steel plate.
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Earlier this year, South Korea's second largest steelmaker reduced its SA283 Gr.C steel tensile strength annual production of hot rolled coils from 1 million tons previously to 700 thousand tons per year for EAFs. A turnaround is expected after the third quarter of this year. In the three months to March 31, Hyundai Steel had a net loss of 88.6 billion won ( million), up from 94.4 trillion won in net profit in the same period last year.