surfaceC.4 manufacturing method and heat treatment process

J55 Tubing
J55 Tubing
Group steel grade type Manufacturing method Heat Treatment Minimum tempering
temperature
\u2103
1 H40 S or EW No regulations
J55 S or EW No regulations
K55 S or EW No regulations
N80 1 S or EW c
N80 Q S or EW Q&T
2 M65 S or EW d
L80 1 S or EW Q&T 566
L80 9Cr S Q&T 593
L80 13Cr S Q&T 593
C90 1 S Q&T 621
C90 2 S Q&T 621
C95 S or EW Q&T 538
T95 1 S Q&T 649
T95 2 S Q&T 649
3 P110 S or EW f,g Q&T
4 Q125 1 S or EWg Q&T
Q125 2 S or EWg Q&T
Q125 3 S or EWg Q&T
Q125 4 S or EWg Q&T
aS\u2014\u2014seamless process; EW\u2014\u2014electric welding process.
bAt the option of the Manufacturer or as specified on the order, full-Length normalized (N), normalized and tempered (N&T), or quenched and tempered (Q&T).
cFull length normalizing or normalizing + tempering is selected by the manufacturer.
dAll Pipes shall be heat treated throughout. At the option of the manufacturer, or normalized throughout the length as specified in the purchase order.(N), normalized + tempered (N&T) or quenched + tempered (Q&T).
etubes of grades 9Cr and 13Cr may be air quenched.
fspecial requirements for the chemical composition of P110 steel grade electric welded casing are shown in TableC.5 Provisions.
gSpecial requirements applicable only to P110 and Q125 grade electric welded pipes are specified in A.5 (SR11).

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