Chemical Composition for API5L PSL 2 Pipes
Chemical composition for PSL 2 pipe with t ≤ 25,0 mm (0.984 in)
| Steel grade (steel name) |
Mass fraction, based upon heat and product analyses
% maximum |
Carbon equivalenta
% maximum |
| C b |
Si |
Mn b |
P |
S |
V |
Nb |
Ti |
Other |
CEiiw |
CEpcm |
| Seamless and welded pipes |
| 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 |
0,10f |
0,05 |
0,04 |
d,e |
0,43 |
0,25 |
| L415N or X60N |
0,24f |
0,45f |
1,40f |
0,025 |
0,015 |
0,10f |
0,05 |
0,04f |
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 |
0,18f |
0,45f |
1,70f |
0,025 |
0,015 |
g |
g |
g |
h |
0,43 |
0,25 |
| L450Q or X65Q |
0,18f |
0,45f |
1,70f |
0,025 |
0,015 |
g |
g |
g |
h |
0,43 |
0,25 |
| L485Q or X70Q |
0,18f |
0,45f |
1,80f |
0,025 |
0,015 |
g |
g |
g |
h |
0,43 |
0,25 |
| L555Q or X80Q |
0,18f |
0,45f |
1,90f |
0,025 |
0,015 |
g |
g |
g |
i,j |
as agreed |
| Welded pipe |
| L245M or BM |
0,22 |
0,45 |
1,20 |
0,025 |
0,015 |
0,05 |
0,05 |
0,04 |
e |
0,43 |
0,25 |
| L290M or X42M |
0,22 |
0,45 |
1,30 |
0,025 |
0,015 |
0,05 |
0,05 |
0,04 |
e |
0,43 |
0,25 |
| L320M or X46M |
0,22 |
0,45 |
1,30 |
0,025 |
0,015 |
0,05 |
0,05 |
0,04 |
e |
0,43 |
0,25 |
| L360M or X52M |
0,22 |
0,45 |
1,40 |
0,025 |
0,015 |
d |
d |
d |
e |
0,43 |
0,25 |
| L390M or X56M |
0,22 |
0,45 |
1,40 |
0,025 |
0,015 |
d |
d |
d |
e |
0,43 |
0,25 |
| L415M or X60M |
0,12f |
0,45f |
1,60f |
0,025 |
0,015 |
g |
g |
g |
h |
0,43 |
0,25 |
| L450M or X65M |
0,12f |
0,45f |
1,60f |
0,025 |
0,015 |
g |
g |
g |
h |
0,43 |
0,25 |
| L485M or X70M |
0,12f |
0,45f |
1,70f |
0,025 |
0,015 |
g |
g |
g |
h |
0,43 |
0,25 |
| L555M or X80M |
0,12f |
0,45f |
1,85f |
0,025 |
0,015 |
g |
g |
g |
i |
0,43f |
0,25 |
| L625M or X90M |
0,10 |
0,55f |
2,10f |
0,020 |
0,010 |
g |
g |
g |
i |
--- |
0,25 |
| L690M or X100M |
0,10 |
0,55f |
2,10f |
0,020 |
0,010 |
g |
g |
g |
i,j |
0,25 |
| L830M or X120M |
0,10 |
0,55f |
2,10f |
0,020 |
0,010 |
g |
g |
g |
i,j |
0,25 |
Table ---Chemical composition for PSL 2 pipe with t ≤ 25,0 mm (0.984 in) (Continued)
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 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, 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 niobium and vanadium concentrations shall be ≤ 0,06 %.
d The sum of the niobium, vanadium and 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 and 0,15 % maximum for molybdenum.
f Unless otherwise agreed.
g Unless otherwise agreed, the sum of the 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.
Chemical compostion
9.2.4 For PSL 2 pipe with a product analysis carbon mass fraction equal to or less than 0,12 %, the carbon equivalent, CEpcm, shall be determined using Equation (2):
where the symbols for the chemical elements represent the mass fraction in percent (see Table 5).
.If the heat analysis for boron is less than 0,000 5 % then it is not necessary for the product analysis to include boron, and the boron content may be considered to be zero for the CEpcm calculation.
9.2.5 For PSL 2 pipe with a product analysis carbon mass fraction greater than 0,12 % the carbon equivalent, CEllw shall be determined using Equation (3):
where the symbols for the chemical elements represent the mass fraction in percent (see Table 5).
NOTE: A derogation from the ISO rules for the presentation of chemical equations has been granted for Equations (2) and (3) in deference to their longstanding use in the industry.
Related References:
API 5CT. Tubing
API 5L. Line Pipes
OCTG API 5L ASTM Line Pipes Specification
Chemical Composition for API 5L PSL 1 Pipes
Chemical Composition for API 5L PSL 2 Pipes
API 5L PSL 1 Pipe Mechanical Properties Tensile Strength
API 5L PSL 2 Pipe Mechanical Properties Tensile Strength
API 5L PSL 2 Pipes Impact Test Table
API 5L Steel Number Steel Designation Equivalent Table ISO 3138 EN 10027-2 |
