API 5L PSL 1 Grade B is commonly used in Read More

API 5L PSL 1 Grade B is commonly used in steel pipe manufacturing. We are API 5L PSL 1 Grade B LSAW steel pipe manufacturer. Let see the API 5L PSL 1 Grade B Chemical composition and mechanics capability below:

API 5L PSL 1 Grade B

Chemical Composition (%)

CMnPSVNbTi
Max. Max. Max. Max. Max. Max. Max.
0.261.200.0300.030c,dc,dd
  • a. Cu ≤ = 0.50% Ni; ≤ 0.50%; Cr ≤ 0.50%; and Mo ≤ 0.15%
  • b. For each reduction of 0.01% below the specified max. concentration for carbon, an increase of 0.05% above the specified max. concentration for Mn is permissible, up to a max. of 1.65% for grades ≥ B, but ≤ = X52; up to a max. of 1.75% for grades > X52, but < X70; and up to a maximum of 2.00% for X70.
  • c. Unless otherwise agreed NB + V ≤ 0.06%
  • d. Nb + V + TI ≤ 0.15%
  • 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%

Mechanics Capability

Pipe Body Pipe Body Pipe Body Weld Seam
Yield StrengthTensile StrengthElongationTensile Strength
min. (MPa) min. (MPa) % min. (MPa)
245415c415
  • a. For intermediate grade, the difference between the specified minimum tensile strength and the specified minimum yield for the pipe body shall be as given for the next higher grade.
  • b. For the intermediate grades, the specified minimum tensile strength for the weld seam shall be the same as determined for the body using footnote a.
  • c. The specified minimum elongation, Af, expressed in percent and rounded to the nearest percent, shall be determined using the following equation:     
equation

Where C is 1 940 for calculation using Si units and 625 000 for calculation 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, 130mm2 (0.20 in2) for 12.7 mm (0.500 in) and 8.9 mm (.350 in) diameter test pieces; and 65 mm2 (0.10 in2) for 6.4 mm (0.250in) 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 (0.10in2)
  • ——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 (0.10in2)

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

API 5L PSL 1 steel grade B

API 5L PSL 1 and PSL 2 Have Differences

In API 5L Specification, there are two product levels (PSL 1 and PSL 2) of seamless and welded steel pipe. Level PSL 1 is a standard quality for line pipe. And level PSL 2 contains extra requirements. Such as chemical, mechanical properties, and testing requirements.  

We can use a pipeline in the transportation of petroleum and natural gas. In Annex H, it indicated the material used in a sour service application. For offshore service application, refers to Annex J in API 5L 45th Edition.

Ingots, blooms, billets, coils or plates used for the manufacture of pipe shall be made via basic oxygen, electric furnace or open hearth in combination with a ladle refining process. For PSL2, the steel shall be killed and melted according to a fine grain practice. The coil or plate used for PSL2 pipe shall not contain any repair welds.

In API 5L Specification. Steel Grades covered by this specification are A25, A, B ( and the following “X” Grades)

The two-digit numbers following  “X” indicates the Min. Yield Strength (in 000’s psi) of pipe produced to this grade. Winsteel can produce a full range of API 5L PSL-1 & PSL-2 line pipe in welded steel pipe (LSAW).

Other Related Steel Grade:

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