Export 2.6mm thick coil SA573 Grade 70 structural steel mild plate

According to South Korea newsis reported on March 12, Korea iron and steel association statistics show that in February, South Korea's domestic SA573 Grade 70 structural steel mild plate steel exports to 2.44 million tons, down 2.4 percent year on year, after January down 3 percent, the second consecutive month of decline. In the past three years, South Korea's steel exports have decreased year by year, from 31.67 million tons in 2017 to 30.44 million tons in 2018 and 30.38 million tons in 2019. Instead, South Korea's SA573 Grade 70 structural steel mild plate steel imports increased last year. As China's economy slows and steel prices fall, Chinese steel is pouring into South Korea, analysts say.

When the steel plate containing molybdenum only is at high temperature for a long time, the carbon will aggregate into graphite and precipitate, which will worsen the performance. To eliminate this tendency, chromium is often added to the SA573 Grade 70 structural steel mild plate, steel plate at the same time. When chromium is added to the steel plate, the heat strength, high temperature oxidation resistance and corrosion resistance can also be improved.

asme sa514 gr C quenched and tempered alloy steel plate element composition%
C: 0.02-0.20, Si: 0.15-0.30, Mn: 1.10-1.50, P max.: 0.035, S max.: 0.035, B max.: 0.005, Mo: 0.15-0.30
The mechanical properties in thickness (mm) T≤65
Yield strength (≥Mpa): 690
Tensile strength (Mpa):760-895
Elongation in ≥,%: 18

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