United States · API

Grade X56 - PSL 2

API 5L:2004 — Specification for line pipe forty-third edition;errata december 2004

Chemical composition

wt% · log scale
0.0010.010.1110C0.24CEV0.43Mn1.4P0.025S0.015Ti0.04
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2386–544 MPaTensile strength Rm490–758 MPaImpact energy Kv/Ku≥41 J

Chemical composition

ElementminmaxSimilarRemarks
C0.24For Seamless pipe C max=0.24% or For Welded pipe C max=0.22%
CEV0.43
Mn1.4
P0.025
S0.015
Ti0.04

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
seamless or welded steel tube, Heat treated386–544490–758≥41 Charpy V Notch (0°C)