N80-API-5CT-Casing

Manufacturing method and heat treatment process

surfaceC.4 manufacturing method and heat treatment process Group steel grade type Manufacturing method Heat Treatment Minimum temperingtemperature℃ 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…

surfaceC.4 manufacturing method and heat treatment process

Groupsteel gradetypeManufacturing methodHeat TreatmentMinimum tempering
temperature
1H40S or EWNo regulations
 J55S or EWNo regulations
 K55S or EWNo regulations
 N801S or EWc
 N80QS or EWQ&T
2M65S or EWd
 L801S or EWQ&T566
 L809CrSQ&T593
 L8013CrSQ&T593
  C901SQ&T621
 C902SQ&T621
 C95S or EWQ&T538
 T951SQ&T649
 T952SQ&T649
3P110S or EW f,gQ&T
4Q1251S or EWgQ&T
 Q1252S or EWgQ&T
 Q1253S or EWgQ&T
 Q1254S or EWgQ&T
aS——seamless process; EW——electric 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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