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AISI 4140 / ASTM A193 B7 Cold Drawn and Q&T Steel Round Bars for Anchor Bolts / Threaded Rods, Find Details and Price about A193 B7 Plain Bars AISI 4140 Qt Steel Bar from AISI 4140 / ASTM A193 B7 Cold Drawn and Q&T Steel Round Bars for Anchor Bolts / Threaded Rods - Laiwu Xincheng Metal Co., Ltd.