Chemical Composition for PSL 2 pipe with t ≤ 0.984” |
Steel Grade | Mass fraction, % based on heat and product analyses | Carbon Equiv a% |
C b | Si | Mn b | P | S | V | Nb | Ti | Other | CE IIW | CE Pcm |
max | max | max | max | max | max | max | max | max | max |
X52Q | 0.18 | 0.45 | 1.5 | 0.025 | 0.015 | 0.05 | 0.05 | 0.04 | e | 0.43 | 0.25 |
a Based upon product analysis, for seamless pipe with t>20.0mm
(0.787in), the carbon equivalent limits shall be as agreed. The CE
IIW limits apply if the carbon mass fraction is greater than 0.12%
and the CE Pcm limits apply if the carbon mass fraction is less
than or equal to 0.12%. |
b. For each reduction of 0.01% below the specified maximum
concentration for carbon, an increase of 0.05% above the specified
maximum for manganese is permissible, up to a maximum of 1.65% for
grades ≥B, but ≤X52; up to a maximum of 1.75% for grades>X52, but
<X70; and up to a maxiumum of 2.00% for grade ≥X70, but ≤X80; and
up to a maxium of 2.20% for grades >X80. |
c. Unless otherwise agreed, the sum of the niobium and vanadium
concentrations shall be ≤0.06% |
d. The sum of the niobium, vanadium and titianium concentrations
shall be ≤0.15% |
e. unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum
for nickel, 0.30% maximum for chromium and 0.15% maximum for
molybdenum. |
f. Unless otherwise agreed. |
g. unless otherwise agreed, the sum of niobium, vanadium and
titanium concentrations shall be ≤0.15%. |
h. Unless otherwise agreed, 0.50% maximum for copper, 0.50% maximum
for nickel, 0.50% maximum for chromium and 0.50% maximum for
molybdenum. |
i. Unless otherwise agreed, 0.50% maximum for copper, 1.00% maximum
for nickel, 0.50% maximum for chromium and 0.50% maximum for
molybdenum. |
j 0.004% maximum for boron. |