What is the difference between API X42 and X52

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Grades covered by API 5L standards are A25, A, B and "X" Grades such as X42, X46, X52, X56, X60, X65, X70, X80 and so on). The two-digit number following the "X" indicates the Minimum Yield Strength (in 000's psi) of pipe produced to this grade.

API 5L X42 line pipe and API 5L X52 line pipe (Seamless and welded pipe) of all grades have PSL1 and PSL2 two product specifications, they are different on chemical composition, manufacturing processes, mechanical strength, heat treatment, test records, traceability, etc. Actually, X42 and X52, etc. denote the minimum yield strength of the pipe steel. X42 has the minimum yield strength of 42 kilopound/square inch and X52 has the 52 ksi.

API X42 and X52 chemical properties:

Grade

C max

Mn max

P max

S max

Si max

X42

PSL1

0.26

1.20

0.030

0.030

/

PSL2

0.22

1.30

0.025

0.015

0.45

X52

PSL1

0.26

1.40

0.030

0.030

/

PSL2

0.22

1.40

0.025

0.015

0.45

API X42 and X52 mechanical properties:

Grade

Y. S (ksi) min

T. S (ksi) min

Elongation min

X42

PSL1

60

42

28%

PSL2

60-100

42-72

/

X52

PSL1

66

52

21%

PSL2

66-110

52-77

/

The X42 and x52 pipeline steel plate are widely used in petroleum and natural gas industries.

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