ASTM A53 / A53M

This specification covers seamless and welded black and hot-dipped galvanized steel pipe in NPS 1⁄8 to NPS 26 [DN 6 to DN 650] , inclusive, with nominal wall thickness. It shall be permissible to furnish pipe having other dimensions provided that such pipe complies with all other requirements of this specification. Supplementary requirements of an optional nature are provided and shall apply only when specified by the purchaser.This specification covers the following types and grades:

  1. Type F—Furnace-butt-welded, continuous welded Grade A,
  2. Type E—Electric-resistance-welded, Grades A and B, and
  3. Type S—Seamless, Grades A and B.
Grades Descriptions
Grade A -
Grade B -

Chemical Properties

Element Grade A Grade B
Type S Type E Type F Type S Type E
Carbon 0.25 0.25 0.30 0.30 0.30
Manganese 0.95 0.95 1.20 1.20 1.20
Phosphorus 0.05 0.05 0.05 0.05 0.05
Sulfur 0.045 0.045 0.045 0.045 0.045
CopperA 0.40 0.40 0.40 0.40 0.40
NickelA 0.40 0.40 0.40 0.40 0.40
ChromiumA 0.40 0.40 0.40 0.40 0.40
MolybdenumA 0.15 0.15 0.15 0.15 0.15
VanadiumA 0.08 0.08 0.08 0.08 0.08
Note: [A] The total composition for these five elements shall not exceed 1.00 %.

Mechanical Properties

Grades Tensile strength, min, psi [MPa] Yield strength, min, psi [MPa] Elongation in 2 in. or 50 mm
Grade A 48 000 [330] 30 000 [205] A,B
Grade B 60 000 [415] 35 000 [240] A,B
Note A: The minimum elongation in 2 in. [50 mm] shall be that determined by the following equation:
e = 625000 [1940] A0.2 / U 0.9
where: e = minimum elongation in 2 in. or 50 mm in percent, rounded to the nearest percent
A = the lesser of 0.75 in.2 [500 mm2] and the cross-sectional area of the tension test specimen, calculated using the specified outside diameter of the pipe, or the nominal width of the tension test specimen and the specified wall thickness of the pipe, with the calculated value rounded to the nearest 0.01 in.2 [1 mm2]
and U = specified minimum tensile strength, psi [MPa].
Note B: For the minimum elongation values that are required for various combinations of tension test specimen size and specified minimum tensile strength,whichever is applicable

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