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ASTM A53
ASTM A106
API 5L
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ASTM A350
ASTM A105
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ASTM A182
A350 LF2
ASTM A234
ASTM A420
ASTM A860
 A193 B7
A194 2H
A240 GR.410
A312 S31726

API 5L 

Chemical composition for PSL1 pipe with thickness ≤ 25,0 mm (0.984 in)

Grade  heat and product analyses a(max%)
C b Mn b P S Nb Ti
Seamless pipe
L175 or A25 0.21 0.60 0.030 0.030 - - -
L175P or A25P 0.21 0.60 0.045-0.080 0.030 - - -
L210 or A 0.22 0.90 0.030 0.030 - - -
L245 or B 0.28 1.20 0.030 0.030 c,d c,d c,d
L290 or X42 0.28 1.30 0.030 0.030 d d d
L320 or X46 0.28 1.40 0.030 0.030 d d d
L360 or X52 0.28 1.40 0.030 0.030 d d d
L390 or X56 0.28 1.40 0.030 0.030 d d d
L415 or X60 0.28 e 1.40 e 0.030 0.030 f f f
L450 or X65 0.28 e 1.40 e 0.030 0.030 f f f
L485 or X70 0.28 e 1.40 e 0.030 0.030 f f f
  Welded pipe
L175 or A25 0.21 0.60 0.030 0.030 - - -
L175P or A25P 0.21 0.60 0.045-0.080 0.030 - - -
L210 or A 0.22 0.90 0.030 0.030 - - -
L245 or B 0.26 1.20 0.030 0.030 c,d c,d c,d
L290 or X42 0.26 1.30 0.030 0.030 d d d
L320 or X46 0.26 1.40 0.030 0.030 d d d
L360 or X52 0.26 1.40 0.030 0.030 d d d
L390 or X56 0.26 1.40 0.030 0.030 d d d
L415 or X60 0.26 e 1.40 e 0.030 0.030 f f f
L450 or X65 0.26 e 1.45 e 0.030 0.030 f f f
L485 or X70 0.26 e 1.65 e 0.030 0.030 f f f

a. 0,50 % maximum for Cu; 0,50 % maximum for Ni; 0,50 % maximum for Cr; and 0,15 % maximum for Mo. 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 C, an increase of 0,05 % above the specified maximum concentration for Mn 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 Nb and V contents shall be ≤ 0,06 %.
d. The sum of the Nb, V and Ti concentrations shall be ≤ 0,15 %.
e. Unless otherwise agreed.
f. Unless otherwise agreed, the sum of the NbV and Ti concentrations shall be ≤ 0,15 %.

Chemical composition for PSL2 pipe with thickness ≤ 25,0 mm (0.984 in)

Grade  heat and product analyses  Carbon equivalent a
C b Si Mn b P S Nb Ti Other
Seamless and welded pipes  CEIIW  CEPcm
L245R or
BR
0.24 0.40 1.20 0.025 0.015 c c 0.04 e 0.43 0.25
L290R or X42R 0.24 0.40 1.20 0.025 0.015 0.06 0.05 0.04 e 0.43 0.25
L245N or
BN
0.24 0.40 1.20 0.025 0.015 c c 0.04 e 0.43 0.25
L290N or X42N 0.24 0.40 1.20 0.025 0.015 0.06 0.05 0.04 e 0.43 0.25
L320N or X46N 0.24 0.40 1.40 0.025 0.015 0.07 0.05 0.04 d,e 0.43 0.25
L360N or X52N 0.24 0.45 1.40 0.025 0.015 0.10 0.05 0.04 d,e 0.43 0.25
L390N or X56N 0.24 0.45 1.40 0.025 0.015 0.10 f 0.05 0.04 d,e 0.43 0.25
L415N or X60N 0.24 f 0.45 f 1.40 f 0.025 0.015 0.10 f 0.05 f 0.04 f g,h as agreed
L245Q or
BQ
0.18 0.45 1.40 0.025 0.015 0.05 0.05 0.04 e 0.43 0.25
L290Q or X42Q 0.18 0.45 1.40 0.025 0.015 0.05 0.05 0.04 e 0.43 0.25
L320Q or X46Q 0.18 0.45 1.40 0.025 0.015 0.05 0.05 0.04 e 0.43 0.25
L360Q or X52Q 0.18 0.45 1.50 0.025 0.015 0.05 0.05 0.04 e 0.43 0.25
L390Q or X56Q 0.18 0.45 1.50 0.025 0.015 0.07 0.05 0.04 d,e 0.43 0.25
L415Q or X60Q 0.18 f 0.45 1.70 0.025 0.015 g g g h 0.43 0.25
L450Q or X65Q 0.18 f 0.45 1.70 0.025 0.015 g g g h 0.43 0.25
L485Q or X70Q 0.18 f 0.45 1.80 0.025 0.015 g g g h 0.43 0.25
L555Q or X80Q  0.18 f 0.45 1.90 0.025 0.015 g g g i,j as agreed
  Welded pipe   
L245M or
BM
0.22 0.45 1.2 0.025 0.015 0.05 0.05 0.04 e 0.43 0.25
L290M or X42M  0.22 0.45 1.3 0.025 0.015 0.05 0.05 0.04 e 0.43 0.25
L320M or X46M 0.22 0.45 1.3 0.025 0.015 0.05 0.05 0.04 e 0.43 0.25
L360M or X52M 0.22 0.45 1.4 0.025 0.015 d d d e 0.43 0.25
L390M or X56M 0.22 0.45 1.4 0.025 0.015 d d d e 0.43 0.25
L415M or X60M 0.12 f 0.45 f 1.60 f 0.025 0.015 g g g h 0.43 0.25
L450M or X65M 0.12 f 0.45 f 1.60 f 0.025 0.015 g g g h 0.43 0.25
L485M or X70M 0.12 f 0.45 f 1.70 f 0.025 0.015 g g g h 0.43 0.25
L555M or X80M 0.12 f 0.45 f 1.85 f 0.025 0.015 g g g i 0.43 f 0.25
L625M or X90M 0.10 0.55 f 2.10 f 0.020 0.010 g g g i - 0.25
L690M or X100M 0.10 0.55 f 2.10 f 0.020 0.010 g g g i,j 0.25
L830M or X120M 0.10 0.55 f 2.10 f 0.020 0.010 g g g i,j 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 CEIIW 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 C, an increase of 0.05 % above the specified maximum for Mn 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; up to a maximum of 2.00 % for grades ≥ L485 or X70, but ≤ L555 or X80; and up to a maximum of 2,20 % for grades > L555 or X80.
c. Unless otherwise agreed, the sum of the Ni and V concentrations shall be ≤ 0.06 %.
d. The sum of the NiV and Ti concentrations shall be ≤ 0.15 %.
e. Unless otherwise agreed, 0.50 % maximum for Cu, 0.30 % maximum for Ni, 0.30 % maximum for Cr and 0.15 % maximum for Mo.
f. Unless otherwise agreed.
g. Unless otherwise agreed, the sum of the NiV and Ti concentrations shall be ≤ 0.15 %.
h. Unless otherwise agreed, 0.50 % maximum for Cu, 0.50 % maximum for Ni 0.50 % maximum for Cr  and 0.50 % maximum for Mo.
i. Unless otherwise agreed, 0.50 % maximum for Cu, 1.00 % maximum for Ni, 0.50 % maximum for Cr and 0.50 % maximum for Mo.
j. 0.004 % maximum for B (boron).

 

Requirements for the results of tensile tests for PSL 1 pipe

Pipe grade

Pipe body of seamless and welded pipes

Weld seam of EW,SAW and COW pipes

Yield strength a  Rt0,5 Mpa Min.

Tensile strength a  Rm Mpa  Min.

Elongation  Af %  Min.

Tensile strength b    Rm Mpa  Min.

L175 or A25

175

310

c

310

L175P or A25P

175

310

c

310

L210 or A 

210

335

c

335

L245R or BR   L245 or B

245

415

c

415

L290R or X42R  L290 or X42

290

415

c

415

L320 or X46

320

435

c

435

L360 or X52

360

460

c

460

L390 or X56

390

490

c

490

L415 or X60

415

520

c

520

L450 or X65

450

535

c

535

L485 or X70

485

570

c

570

 

 

 

 

 

 

 

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 determined 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:

Af = C AXC0.2/U0.9

where

C is 1940 for calculations using SI units and 625000 for calculations using USC units;

Axc is the applicable tensile test piece cross-sectional area, expressed in square millimetres (square inches), as follows:

— for circular cross-section test pieces, 130 mm2 (0.20 in2) for 12,5 mm (0.500 in) and 8,9 mm (0.350 in) diameter test pieces; and 65 mm2(0.10 in2) for 6,4 mm (0.250 in) diameter test pieces;

— for full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in2);

— for strip test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in2); 

U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch).

 

Requirements for the results of tensile tests for PSL 2 pipe 

Pipe grade Pipe body of seamless and welded pipes

Weld seam of

 HFW,SAW and COW pipes

Yield strength 

Rt0,5 b MPa (psi)

Tensile strength a 

Rm MPa (psi)

Ratio a, b, c 

Rt0,5/Rm

Elongation

 Af %

Tensile strength d 

Rm MPa (psi)

minimum maximum minimum maximum maximum minimum minimum

L245R or BR

L245N or BN

L245Q or BQ

L245M or BM

245 450 e 415 760 0.93  f 415

L290R or X42R

L290N or X42N

L290Q or X42Q

L290M or X42M

290 495 415 760 0.93  f 415

L320N or X46N

 L320Q or X46Q

L320M or X46M

320 525 4235 760 0.93  f 435

L360N or X52N

L360Q or X52Q

L360M or X52M

360 530 460 760 0.93  f 460

L390N or X56N

L390Q or X56Q

L390M or X56M

390 545 490 760 0.93  f 490

L415N or X60N

L415Q or X60Q

L415M or X60M

415 565 520 760 0.93  f 520

L450Q or X65Q

L450M or X65M

450 600 535 760 0.93  f 535

L485M or X70M

 L485Q or X70Q

485 635 570 760 0.93  f 570

L555Q or X80Q

L555M or X80M

555 705 625 825 0.93  f 625
L625M or X90M 625 775 695 915 0.95  f 695
L690M or X100M 690 840 760 990 0.97  f 760
L830M or X120M 830 1050 915 1145 0.99  f 915

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 or X80, the tensile strength shall be u 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).

e. For pipe with D < 219,1 mm (8.625 in), the maximum yield strength shall be u 495 MPa (71 800 psi).

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

Af = C AXC0.2/U0.9

where

C is 1 940 for calculations using SI units and 625 000 for calculations using USC units;

Axc is the applicable tensile test piece cross-sectional area, expressed in square millimeters (square inches), as follows:

— for circular cross-section test pieces, 130 mm2 (0.20 in2) for 12,5 mm (0.500 in) and 8,9 mm (0.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6,4 mm (0.250 in) diameter test pieces;

— for full-section test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified outside diameter and the specified wall thickness of the pipe, rounded to the nearest 10 mm2(0.01 in2);

— for strip test pieces, the lesser of a) 485 mm2 (0.75 in2) and b) the cross-sectional area of the test piece, derived using the specified width of the test piece and the specified wall thickness of the pipe, rounded to the nearest 10 mm2 (0.01 in2);

U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch).

g. Lower Rt0,5/Rm ratio values may be specified by agreement for L690 or X100 and L830 or X120 pipe.


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