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... the deformed and annealed steel sheet, its grains are distributed randomly. The silicon content of the alloy is 1.5% to 3.0%, or the sum of the silicon and aluminum content is 1.8% to 4.0%. The products are...
... Grade A, Grade C, Grade D, all belongs to carbon tube Production method ERW (Electric Resistance Welded) Heat treatment Annealed, normalized, stress relieved Key words ERW steel tube, steel pipes ......