Low-Cycle Fatigue Properties of the X70 High-Frequency Electric-Resistant Welded Pipes

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2"> </td><td class="align_center" colspan="2">Yield strength (MPa)</td><td class="align_center" colspan="2">Tensile strength (MPa)</td><td class="align_center" colspan="2">Impact energy (J)</td></tr><tr class="thead"><td class="align_center">Tested value</td><td class="align_center">Specification</td><td class="align_center">Tested value</td><td class="align_center">Specification</td><td class="align_center">Tested value</td><td class="align_center">Specification</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Pipe body</td><td class="align_center">525</td><td class="align_center">481–621</td><td class="align_center">620</td><td class="align_center">565–758</td><td class="align_center">209</td><td class="align_center">120</td></tr><tr><td class="align_left">Weld seam</td><td class="align_center" colspan="2">—</td><td class="align_center">605</td><td class="align_center">565–758</td><td class="align_center">130 (weld junction)<br/>172 (HAZ)</td><td class="align_center">60</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Mechanical properties of the X70 HFW pipes.</div>

Advances in Materials Science and Engineering

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Table 2

Table 2: Low-Cycle Fatigue Properties of the X70 High-Frequency Electric-Resistant Welded Pipes 