Crossover Subs 79.4--279.4 Size 79.4---279.4

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Crossover Subs 79.4--279.4 Size 79.4---279.4
Posting date : Apr 17, 2013
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72-
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Crossover Subs 79.4--279.4 Size 79.4---279.4 cross-over subs are made from 4145H alloy steel, which are fully heat-treated to drill collar specifications. All connections are protected by a phosphated surface coating to minimize galling on initial make-up. A: Straight OD Subs B: Reduced Section Subs C: Left Hand Subs Mechanical Properties of Cross-over Subs OD Range Yield Strength MPa Tensile Strength MPa Elongation % Hardness Brinell HB Impact AKV J mm in 79.4~196.4 31/8~73/4 >=760 >=965 >=13 >=285 >=54 203.2~279.4 8~11 >=690 >=930 >=277 Usage: acts as connecting and change-over, deliver torque function in different types of drill tools.

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