API 5L X70 High-Yield Steel Plate & Coil

Steel Grade	Mass Fraction, Based on Heat and Product Analyses a.g , max, %
	C b	Mn b	P	S	V	Nb	Ti
Seamless Pipe
L485 or X70	0.28 e	1.40 e	0.03	0.03	f	f	f
Welded Pipe
L485 or X70	0.26 e	1.65 e	0.03	0.03	f	f	f

a Cu ≤ 0.50 %; Ni ≤ 0.50%; Cr ≤ 0.50 % and Mo ≤ 0.15 %.
b For each reduction of 0.01 % below the specified maximum concentration for carbon, an increase of 0.05 % above the specified maximum concentration for Mn is permissible, up to a maximum of 1.75 % for grades > L360 or X52, but e Unless otherwise agreed.
f Unless otherwise agreed, Nb + V + Ti ≤ 0.15 %.
g No deliberate addition of B is permitted and the residual B ≤ 0.001 %.

Steel Grade	Mass Fraction, Based on Heat and Product Analyses , %, max									Carbon Equivalent a , %, max
	C b	Si	Mn b	P	S	V	Nb	Ti	Other	CEllw	CEpcm
Seamless and Welded Pipe
L485Q or X70Q	0.18 f	0.45 f	1.80 f	0.025	0.015	g	g	g	h, I	0.43	0.25
Welded Pipe
L485M or X70M	0.12 f	0.45 f	1.70 f	0.025	0.015	g	g	g	h, I	0.43	0.25

a Based on a product analysis, for seamless pipe with t > 20.0 mm [0.787 in], the CE limits shall be as agreed; the CEllw limits apply if C > 0.12 %, and the CEpcm limits apply if C ≤ 0.12 %.
b For each reduction of 0.01 % below the specified maximum for C, an increase of 0.05 % above the specified maximum for Mn is permissible, up to a maximum of 2.00 % for grades ≥ L485 or X70, but≤L555 or X80;
f Unless otherwise agreed.
g Unless otherwise agreed,Nb + V + Ti ≤ 0.15 %.
h Unless otherwise agreed,Cu ≤ 0.50%; Ni ≤ 0.50%; Cr ≤ 0.50 % and Mo ≤ 0.50%.
j B ≤ 0.004 %.
l For PSL2 pipe grades except those grades to which footnote j) already applies, the following applies: unless otherwise agreed no intentional addition of B is permitted and residual B ≤ 0.001 %.