4145 Drill Collar Bars
AISI 4145 H MODIFIED HTSR | Solid Drill Collars to API Spec 7 | ||||||||||||||||||||||||||||||||||||||||||||||||||||
Typical Analysis |
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Characteristics |
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AISI 4145 H MODIFIED HTSR |
Mechanical Properties
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Size - inches | 4 ¾" Dia | 6 ½" Dia |
Tensile Strength, psi | 156,509 | 148,884 |
Yield Strength, psi | 137,452 | 126,020 |
Elongation (%) | 19.6 | 18.6 |
Charpy V-Notch Ft/lb/J | 52-52-51 ft/lbs | 50-51-52 ft/lbs |
Hardness HB | 311 | 302 |
AISI 4145 H MODIFIED HTSR |
Mechanical Properties
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Size - inches | Through 6 ⅞" Dia | Over 6 ⅞" Dia |
Tensile Strength, psi | 140,00 | 135,000 |
Tensile Strength, N/mm² | 965 | 930 |
Yield Strength, psi | 110,000 | 100,000 |
Yield Strength, N/mm² | 759 | 689 |
Elongation (%) | 13 | 13 |
Impact values at R.T | ||
Izod ft/lbs/Joules | ||
Charpy V-Notch Ft/lb/J | 40/54 Min | 40/54 Min |
Hardness HB | 40/54 Min | 40/54 Min |
⅛" below surface | 285/ 341 | 285/ 341 |
1" below surface | 285 Min | 285 Min |
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