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Kelly bar
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Kelly bar is made of AISI4145H alloy steel in accordance with API Specifications and SY/T6509 Standards through integral forging with precision forging machine and integral thermal treatment with intermediate-frequency or 20 m horizontal resistance furnace, which achieves excellent mechanical properties within the full length. Threads can be processed with cold rolling, coppering or phosphating.
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Address: 3rd Floor, Block B, Oriental International Mansion Commercial Building, Qinyuan Street, Jiyuan City, Henan Province
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SAF Coolest v1.3 设置面板 OUJSX-ZPVW-WFASE-ZWF
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