API steel pipe

ASTM A106/A 106M-08 Tensile Requirements

Grade A

Grade B

Grade C

Tensile Strength,min,psi(MPa)

48 000 {330}

60 000 {415}

70 000 {485}

Yield Strength,min,psi(MPa)

30 000 {205}

35 000 {240}

40 000 {275}

Longitudinal

Trabsverse

Longitudinal

Trabsverse

Longitudinal

Trabsverse

Elongation in 2 in. [50 mm], min, %:

Basic minimum elongation transverse strip tests, and for all small

35

25

30

16.5

30

16.5

sizes tested in full section

When standard round 2-in. [50-mm] gage length test specimen is

28

20

22

12

20

12

used

For longitudinal strip tests

A

A

A

For transverse strip tests, a deduction for each 1⁄32-in. [0.8-mm]

1.25

1

1

decrease in wall thickness below 5⁄16 in. [7.9 mm] from the basic

minimum elongation of the following percentage shall be made

A The minimum elongation in 2 in. [50 mm] shall be determined by the following equation:

e 5 625 000A0.2 / U 0.9

for inch-pound units, and

e 5 1 940A0.2 / U 0.9

for SI units,

where:

e = minimum elongation in 2 in. [50 mm], %, rounded to the nearest 0.5 %,

A = cross-sectional area of the tension test specimen, in.2 [mm2], based upon specified outside diameter or nominal specimen width and specified wall thickness,

rounded to the nearest 0.01 in. 2 [1 mm2]. (If the area thus calculated is equal to or greater than 0.75 in. 2 [500 mm2], then the value 0.75 in.2 [500 mm2] shall

be used.), and

U = specified tensile strength, psi [MPa].