Steel Grade

Mass Fraction,Based on Heat and Product Analyses

Carbon

(Steel Name)

%max

Equivalent a %max

cb

Si

Mn b

P

S

V

Nb

Ti

Other

CEIw

CEpcm

Get   more   FRFF   standar      Welded Pipe                  D and our chafs

L245M or BM

0.22

0.45

1.2

0.025

0.015

0.05

0.05

0.04

e,l

0.43

0.25

L290M or X42M

0.22

0.45

1.3

0.025

0.015

0.05

0.05

0.04

e,l

0.43

0.25

L320M or X46M

0.22

0.45

1.3

0.025

0.015

0.05

0.05

0.04

e,I

0.43

0.25

L360M or X52M

0.22

0.45

1.4

0.025

0.015

d

d

d

e,I

0.43

0.25

L390M or X56M

0.22

0.45

1.4

0.025

0.015

d

d

d

e,l

0.43

0.25

L415M or X60M

0.12

0.45

1.60f

0.025

0.015

g

g

g

h,I

0.43

0.25

L450M or X65M

0.12f

0.45

1.60f

0.025

0.015

g

g

g

h,I

0.43

0.25

L485M or X70M

0.12f

0.45

1.70f

0.025

0.015

g

g

g

h,I

0.43

0.25

L555M or X80M

0.12

0.45f

1.85

0.025

0.015

g

9

9

i,

0.43f

0.25

L625M or X90M

0.1

0.55

2.10f

0.02

0.01

9

g

g

i,l

0.25

L690M or X100M

0.1

0.55f

2.10f

0.02

0.01

9

g

g

ij

0.25

L830M or X120M

0.1

0.55

2.10f

0.02

0.01

g

g

g

ij

一

0.25

a Based on product analysis,for seamless pipe with i>20.0mm(0.787in.),the CE limits shall be as agreed;the CEIw 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 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,Nb+V≤0.06%.

d Nb+V+Ti≤0.15%.

eUnless otherwise agreed,Cu≤0.50%;Ni≤0.30%;Cr≤0.30%and Mo ≤0.15%.

f Unless otherwise agreed.

9 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%.

Unless otherwise agreed,Cu≤0.50%;Ni≤1.00%;Cr≤0.50%and Mo≤0.50%. B≤0.004%.

k Unless otherwise agreed,Cu≤0.50%;Ni≤1.00%;Cr≤0.55%and Mo≤0.80%

For PSL2 pipe grades except those grades to which footnote j)already applies,the following applies:unless otherwiseagreed no intentional addition of B is permitted and residual B≤0.001%.

Requirements for the Results of Tensile Tests for PSL2 Pipe

Pipe Body of Seamless and Welded Pipe

Weld Seam of EW,LW,SAW,and   COW Pipe

Yield Strength a

Tensile Strength a

Ratio a,C

Elongation

Tensile  Strengthd

Pipe Grade

Rt0.5 MPa(psi)

Rm MPa(psi)

R+o.5/Rm

(on 50 mm or 2 in.)Af %

Rm MPa(psi)

min

max

min

max

max

min

min

L245R or BR

245-35,500

450(65,300)e

415-60,200

655-95,000

0.93

f

415-60,200

L245N or BN

L245Q or BQ

L245M or BM

L290R or X42R

290-42,100

495-71,800

415-60,200

655-95,000

0.93

f

415-60,200

L290N or X42N

L290Q or X42Q

L290M or X42M

L320N or X46N

320-46,400

525-76,100

435-63,100

655-95,000

0.93

f

435-63,100

L320Q or X46Q

L320M or X46M

L360N or X52N

360-52,200

530-76,900

460-66,700

760-110,200

0.93

f

460-66,700

L360Q or X52Q

L360M or X52M

L390N or X56N

390-56,600

545-79,000

490-71,100

760-110,200

0.93

f

490-71,100

L390Q or X56Q

L390M or X56M

L415N or X60N

415-60,200

565-81,900

520-75,400

760-110,200

0.93

f

520-75,400

L415Q or X60Q

L415M or X60M

L450Q or X65Q

450-65,300

600-87,000

535-77,600

760-110,200

0.93

f

535-77,600

L450M or X65M

L485Q or X70Q

485-70,300

635-92,100

570-82,700

760-110,200

0.93

f

570-82,700

L485M or X70M

L555Q or X80Q

555-80,500

705-102,300

625-90,600

825-119,700

0.93

f

625-90,600

L555M or X80M

L625M or X90M

625-90,600

775-112,400

695-100,800

915-132,700

0.95

chats our

695-100,800

L625Q or X90Q

625-90,600

775-112,400

695-100,800

915-132,700

0.979

f

一

L690M or X100M

690(100,100)b

840(121,800)b

760-110,200

990-143,600

0.97h

f

760-110,200

L690Q or X100Q

690(100,100)b

840(121,800)b

760-110,200

990-143,600

0.97h

f

一

L830M or X120M

830(120,400)b

1050(152,300)b

915-132,700

1145-166,100

0.99h

f

915-132,700

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 up to Grade

L320 or X46,the tensile strength shall be≤655 MPa (95,000 psi);for intermediate grades greater than Grade L320 or X46 and

lower than Grade L555 or X80,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;forSl units,he calculated value

shall be rounded to the nearest 5 MPa;for USC units,the calculated value shallbe rounded to the nearest 100 psi.

b For grades>L625 or X90,Rpo.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 requiring longitudinal testing,the maximum yield strength shall bes 495 MPa(71,800 psi).

f The specified minimum elongation,Af,shall be as determined using the following equation:Af=Cx(Ax0.2xC/U/0.9)

where

C is 1940 for calculations using Sl 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:

1)for circular cross-section test pieces,130mm²(0.20 in.2)for 12.7mm(0.500 in.)and 8.9mm(0.350 in.)diameter test pieces;65mm²(0.10 in.?)for 6.4mm(0.250 in.)diameter test pieces;

2)for ful-section test pieces,the lesser of a)485mm²(0.75 in.?)and b)the croSs-sectional area of the test piece, derived using the specified outside diameter and the specified wallthickness of the pipe,rounded to the nearest

10 mm²(0.01  in.2);

3)for strip test pieces,the lesser of a)485mm²(0.75in.2)and b)the cross-sectional area of the test piece,derived using the

specified width of the test piece and the specified wallthickness of the pipe,rounded to the nearest 10mm²(0.01 in.?);

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

9 Lower values of Rt₀.5/Rmmay be specified by agreement.

h For grades>L625or X90,Rpo.2/Rm applies.Lower values of Rpo.2/Rmmay be specified by agreement.