
TENSILE REQUIREMENTS 

ELONGATION 

psi 
Mpa 
L 
T 

Y.S,min 
35 000 
240 
22 
12 

T.S,min 
60 000 
415 


CHEMICAL REQUIREMENTS 

ELEMENT 
COMPOSITION, % 

ASTM A106 Gr.B 
ASTM A106 Gr.C 

C maxA 
0.30 
0.35 
Mn 
0.291.06 
0.291.06 
P, max 
0.04 
0.04 
S, max 
0.04 
0.04 
Si, min 
0.10 
0.10 
Cr, maxB 
0.40 
0.40 
Cu, maxB 
0.40 
0.40 
Mo, maxB 
0.15 
0.15 
Ni, maxB 
0.40 
0.40 
V, maxB 
0.08 
0.08 
A) For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.35%. 
Tensile Requirements 

ASTM A106 Gr.B 
ASTM A106 Gr.C 

Y.S, min, psi[Mpa] 
35 000 [240] 
40 000 [275] 
T.S., min, psi[Mpa] 
60 000 [415] 
70 000 [485] 
ELONGATION 

ASTM A106 Gr.B 
ASTM A106 Gr.C 

L 
T 
L 
T 
22 
12 
20 
12 
CHEMICAL COMPOSITION 

Mass fraction, based upon heat and product analysis a 

SEAMLESS PIPE 

C 
Mn 
P 
S 
V 
Nb 
Ti 

maxb 
max.b 
min. 
max. 
max. 
max. 
max. 
max. 
0.28 
1.20 
 
0.030 
0.030 
c,d 
c,d 
d 
WELDED PIPE 

0.26 
1.20 
 
0.030 
0.030 
c,d 
c,d 
d 
a 
0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and 

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 manganese is permissible, up to a maximum of 1.65% for grades = L245 or B, but = L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70. 

c 
Unless otherwise agreed, the sum of the niobium and vanadium contents shall be = 0.06%. 

d 
The sum of the niobium ,vanadium and titanium concentrations shall be = 0.15%. 
MECHANICAL REQUIREMENTS 

Weld seam of EW, SAW and COW pipes 

Y.Sa 
T.Sa 
ELONGATION 
Tensile Strengthb 
Mpa(psi) 
Mpa(psi) 
Mpa(psi) 

min 
min 
min 
min 
245(35 500) 
415(60 200) 
28% 
415 (60 200) 
a 
For intermediate grades, the differencec between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade. 

b 
For Intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determines for the pipe body using footnote a) 
CHEMICAL COMPOSITION 

Mass fraction, based upon heat and product analysis a 

SEAMLESS PIPE 

C 
Mn 
P 
S 
V 
Nb 
Ti 

maxb 
max.b 
min. 
max. 
max. 
max. 
max. 
max. 
0.28 
1.30 
 
0.030 
0.030 
d 
d 
d 
WELDED PIPE 

0.26 
1.30 
 
0.030 
0.030 
d 
d 
d 
a 
0.50% maximum for copper, 0.50% maximum for nickel, 0.50% maximum for chromium, and 0.15% maximum for molybdenum. For grades up to and including L360/X52, Cu, Cr and Ni shall not be added intentionally. 

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 manganese is permissible, up to a maximum of 1.65% for grades = L245 or B, but = L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70. 

d 
The sum of the niobium ,vanadium and titanium concentrations shall be = 0.15%. 
MECHANICAL REQUIREMENTS 

Weld seam of EW, SAW and COW pipes 

Y.Sa 
T.Sa 
ELONGATION 
Tensile Strengthb 
Mpa(psi) 
Mpa(psi) 
Mpa(psi) 

min 
min 
min 
min 
290(42 100) 
415(60 200) 
c 
415 (60 200) 
a 
For intermediate grades, the difference between the specified minimum tensile strength and the specified minimum yield strength for the pipe body shall be as given in the table for the next higher grade. 

b 
For Intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determines for the pipe body using footnote a) 

c 
The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be as determined using the following equation: 
CHEMICAL COMPOSITION 

Mass fraction, based upon heat and product analysis % maximum 
CARBON EQUIVALENT a 

% MAXIMUM 

Cb 
Si 
Mnb 
P 
S 
V 
Nb 
Ti 
Other 
CEIIW 
CEPcm 
SEAMLESS & WELDED PIPES 

0.24 
0.45 
1.4 
0.03 
0.02 
0.10 f 
0.05 
0.04 
d,e 
0.43 
0.25 
0.18 
0.45 
1.5 
0.03 
0.02 
0.07 
0.05 
0.04 
d,e 
0.43 
0.25 
WELDED PIPE 

0.22 
0.45 
1.4 
0.03 
0.02 
d 
d 
d 
e 
0.43 
0.25 
a 
Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm 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 for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B 

d 
the sum of the niobium & vanadium & titanium concentrations shall be =0.15% 

e 
Unless otherwise agreed, 0.50% maximum for copper, 0.30% maximum for nickel, 0.30% maximum for chromium, & 0.15% maximum for molybdenum. 

f 
Unless otherwise agreed 

CEIIW 
C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5) 

CEPcm 
C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B 
MECHANICAL REQUIREMENTS 

weld seam of HFW, SAW and COW pipes 

Y.Sa 
T.Sa 
Ratio a,b,c 
Elongation 
Tensile strength d 

Mpa(psi) 
Mpa(psi) 
Af 
Mpa(psi) 

min 
max 
min 
max 
max 
min 
min 
390(56 600) 
545 (79 000) 
490 (71 100) 
760 (110 200) 
0.93 
f 
490 (71 100) 
a 
For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi. 

b 
For grades > L625 or X90, Rp0,2 applies. 

c 
This limit applies for pipe with D > 323,9 mm (12.750 in). 

d 
For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a). 

f 
The specified munimum elongation, Af, shall be as determined using the following equation: 
CHEMICAL COMPOSITION 

Mass fraction, based upon heat and product analysis % maximum 
CARBON EQUIVALENT a 

% MAXIMUM 

Cb 
Si 
Mnb 
P 
S 
V 
Nb 
Ti 
Other 
CEIIW 
CEPcm 
SEAMLESS & WELDED PIPES 

0.24f 
0.45f 
1.4f 
0.03 
0.02 
0.10 f 
0.05f 
0.04f 
g,h 
as agreed 

0.18f 
0.45f 
1.7f 
0.03 
0.02 
g 
g 
g 
h 
0.43 
0.25 
WELDED PIPE 

0.12f 
0.45f 
1.6f 
0.03 
0.02 
g 
g 
g 
h 
0.43 
0.25 
a 
Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm 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 for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B 

f 
Unless otherwise agreed 

g 
Unless otherwise agreed the sum of the niobium, vanadium & 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, & 0.50% maximum for molybdenum. 

CEIIW 
C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5) 

CEPcm 
C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B 
MECHANICAL REQUIREMENTS 

weld seam of HFW, SAW and COW pipes 

Y.Sa 
T.Sa 
Ratio a,b,c 
Elongation 
Tensile strength d 

Mpa(psi) 
Mpa(psi) 
Af 
Mpa(psi) 

min 
max 
min 
max 
max 
min 
min 
415(60 200) 
565 (81 900) 
520 (75 400) 
760 (110 200) 
0.93 
f 
520 (75 400) 
a 
For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi. 

b 
For grades > L625 or X90, Rp0,2 applies. 

c 
This limit applies for pipe with D > 323,9 mm (12.750 in). 

d 
For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a). 

f 
The specified munimum elongation, Af, shall be as determined using the following equation: 
CHEMICAL COMPOSITION 

Mass fraction, based upon heat and product analysis % maximum 

Cb 
Si 
Mnb 
P 
S 
V 
Nb 
SEAMLESS & WELDED PIPES 

0.18f 
0.45f 
1.7f 
0.03 
0.02 
g 
g 
WELDED PIPE 

0.12f 
0.45f 
1.6f 
0.03 
0.02 
g 
g 
a 
Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm 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 for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B 

f 
Unless otherwise agreed 

g 
Unless otherwise agreed the sum of the niobium, vanadium & 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, & 0.50% maximum for molybdenum. 

CEIIW 
C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5) 

CEPcm 
C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B 
MECHANICAL REQUIREMENTS 

weld seam of HFW, SAW and COW pipes 

Y.Sa 
T.Sa 
Ratio a,b,c 
Elongation 
Tensile strength d 

Mpa(psi) 
Mpa(psi) 
Af 
Mpa(psi) 

min 
max 
min 
max 
max 
min 
min 
450(65 300) 
600 (87 000) 
535 (77 600) 
760 (110 200) 
0.93 
f 
535 (77 600) 
a 
For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi. 

b 
For grades > L625 or X90, Rp0,2 applies. 

c 
This limit applies for pipe with D > 323,9 mm (12.750 in). 

d 
For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a). 

f 
The specified munimum elongation, Af, shall be as determined using the following equation: 
CHEMICAL COMPOSITION 

Mass fraction, based upon heat and product analysis % maximum 
CARBON EQUIVALENT a 

% MAXIMUM 

Cb 
Si 
Mnb 
P 
S 
V 
Nb 
Ti 
Other 
CEIIW 
CEPcm 
SEAMLESS & WELDED PIPES 

0.18f 
0.45f 
1.8f 
0.03 
0.02 
g 
g 
g 
h 
0.43 
0.25 
WELDED PIPE 

0.12f 
0.45f 
1.7f 
0.03 
0.02 
g 
g 
g 
h 
0.43f 
0.25 
a 
Based upon product analysis. For seamless pipe with t>20.0 mm (0.787 in), the carbon equivalent limits shall be as agreed. The CELLW limits apply if the carbon mass fraction is greater than 0.12% and the CEpcm 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 for carbon, an increase of 0.05% above the specified maximum for manganese is permissible, up to a maximum of 1.65% for grades = L245 or B 

f 
Unless otherwise agreed 

g 
Unless otherwise agreed the sum of the niobium, vanadium & 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, & 0.50% maximum for molybdenum. 

CEIIW 
C+(Mn/6)+(Cu+Ni/15)+(Cr+Mo+V/5) 

CEPcm 
C+(Si/30)+(Mn/20)+(Cu/20)+(Ni/60)+(Cr/20)+(Mo/15)+(V/10)+5B 
MECHANICAL REQUIREMENTS 

weld seam of HFW, SAW and COW pipes 

Y.Sa 
T.Sa 
Ratio a,b,c 
Elongation 
Tensile strength d 

Mpa(psi) 
Mpa(psi) 
Af 
Mpa(psi) 

min 
max 
min 
max 
max 
min 
min 
485(70 300) 
635 (92 100) 
570 (82 700) 
760 (110 200) 
0.93 
f 
570 (82 700) 
a 
For intermediate grades, the difference between the specified maximum yield strength and the specified minimum yield strength shall be as given in the table for the next higher grade, and the difference between the specified minimum tensile strength and the specified minimum yield strength shall be as given in the table for the next higher grade. For intermediate grades lower than Grade L555 orX80, the tensile strength shall be = 760 Mpa (110 200 psi). For intermediate grades higher than Grade L555 or X80, the maximum permissible tensile strength shall be obtained by interpolation. For SI units, the calculated value shall be rounded to the nearest 5 Mpa. For USC units, the calculated value shall be rounded to the nearest 100 psi. 

b 
For grades > L625 or X90, Rp0,2 applies. 

c 
This limit applies for pipe with D > 323,9 mm (12.750 in). 

d 
For intermediate grades, the specified minimum tensile strength for the weld seam shall be the same value as was determined for the pipe body using footnote a). 

f 
The specified munimum elongation, Af, shall be as determined using the following equation: 