ASTM A193
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ASTM A193 등급 B16 합금강 헤비 육각 볼트
ASTM A193 Grade B16 alloy steel heavy hex bolts use chromium-molybdenum-vanadium chemistry for pressure equipment and industrial bolted joints requiring strength at elevated temperature.
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ASTM A193 등급 B7 합금강 헤비 육각 볼트
ASTM A193 Grade B7 alloy steel heavy hex bolts are quenched-and-tempered chromium-molybdenum fasteners widely specified for high-pressure, elevated-temperature and special-purpose industrial bolted joints.
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ASTM A193 등급 B7M 합금강 헤비 육각 볼트
ASTM A193 Grade B7M alloy steel heavy hex bolts combine chromium-molybdenum bolting chemistry with restricted hardness for pressure-equipment connections where the project requires B7M.