ASTM A193 grade B7 covers fasteners of chromium-molybdenum alloy steel. These fasteners found their utilize in chemical and petroleum development applications. They are made after treating (warm treatment) and extinguishing to obtain the perfect mechanical properties and hardness. B7 is one of the most grade utilized in A193 gr b7 and is basically executed in zinc plating, zinc coating, hot-dip galvanizing, PTFE coating or coated, and xylan coating to anticipate corrosion.
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