12/3/2015 API5LLinePipePhysicalProperties,YieldStrength,TensileStrength

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API5LLinePipePhysicalPropertiesLinepipegradedesignationscomefromAPISpec5LSpecificationforLinePipe.StandardLinePipehasgradedesignationAandB.StrongergradeshavethedesignationXfollowedbythespecifiedminimumyieldstrengthofthe pipe steel,measured in kilopounds per square inch (abbreviated ksi),e.g.X60forpipehavingaminimumyieldstrengthof60ksi.Seethetablebelowforthestandardavailablegrades.

LinePipePhysicalProperties

API5LGradeYieldStrength

min.(ksi)

TensileStrengthmin.(ksi)

YieldtoTensileRatio(max.)

Elongationmin.%1

A 30 48 0.93 28B 35 60 0.93 23

X42 42 60 0.93 23X46 46 63 0.93 22X52 52 66 0.93 21X56 56 71 0.93 19X60 60 75 0.93 19X65 65 77 0.93 18X70 70 82 0.93 17X80 80 90 0.93 16

1 API5Lelongationfiguresvarywithspecimendimensions.Valuesshownfor0.2sq.in.specimen.