United States · ASME

SA-671 CJ 105

ASME SA-671 — Specification for Electric-Fusion-Welded Steel Pipe for Atmospheric and Lower Temperatures

Chemical composition

wt% · log scale
0.00010.0010.010.1110B0.001 – 0.005C0.1 – 0.22Cr1.34 – 2.06Mn0.35 – 0.78Mo0.36 – 0.64P0.025S0.025Si0.08 – 0.45Ti0.005 – 0.11
  • min – max range
  • typical value

Mechanical properties

value range by condition
Yield strength Rp0.2≥620 MPaTensile strength Rm725–930 MPaElongation A≥14 %Reduction of area Z≥45 %steel tubes, 65 <= t < 150 mmYield strength Rp0.2≥690 MPaTensile strength Rm795–930 MPaElongation A≥16 %Reduction of area Z≥45 %steel tubes, t <=, 65 mm

Chemical composition

ElementminmaxSimilarRemarks
B0.0010.005
C0.10.22Heat analysis 0.12 < C <= 0.2%
Cr1.342.06Heat analysis 1.4 < Cr <= 2%
Mn0.350.78Heat analysis 0.4 < Mn <= 0.7%
Mo0.360.64Heat analysis 0.4 < Mo <= 0.6%
P0.025for both analysis
S0.025for both analysis
Si0.080.45Heat analysis 0.1 < Si <= 0.4%
Ti0.0050.11Heat analysis 0.01 < Ti <= 0.1%

Mechanical properties

Heat treatment / conditionYield strengthTensile strengthElongationReduction of areaImpact energyHardness
steel tubes, 65 <= t < 150 mm≥620725–930≥14 Lo = 50mm≥45 Round specimens
steel tubes, t <=, 65 mm≥690795–930≥16 Lo = 50mm≥45 Round specimens; >= 35 Rectangular specimens