ASTM A672 EFW Pipes & Tubes

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ASTM A672 standard specification for electric fusion welded steel pipe for high pressure service at moderate temperatures.

This specification covers electrical-fusion-welded steel pipe for high-pressure service at moderate temperatures. Heat treatment may or may not be required to attain the desired properties or to comply with applicable code requirements. An analysis of each mill heat of plate material shall be made, also, an analysis of the finished deposited weld material from each 500 ft or fraction thereof shall be made. The mechanical test requirements includes one tension test specimen to represent each lot of finished pipe, and one transverse-guided-weld-bend test (two specimens) to represent each lot of finished pipe. Also, radiographic examination shall be made on the full length of each weld.


Chemical Requirements of ASTM A672 :

SpecificationSteel gradeChemical compositionRemarks
CSiMnPSTi
         
Pipes for pressure service 
ASTM A671, A672
-/A45-/0.17-0.980.0350.035-A671/
A672
-/A50-/0.22-
CA55/A550.28-
-/B55-/0.200.13
~0.45
CB60/B600.24
CB65/B650.28
CB70/C700.311.30
-/C55-/0.180.55
~0.98
CC60/C600.21
CC65/C650.240.79
~1.30
CC70/C700.27

Mechanical Properties of ASTM A672:

ProductsSteel GradeBASE METAL MECHANICAL COMPOSITIONWelding point tensile
 strength (N/mm2)
Remarks
Yield point
(N/mm2)
Tensile Stregth
 (N/mm2)
Test PiecesElongation (%)
Pipes for pressure
 service ASTM A671
, A672
-/A45-/165-/310~450--/30-/310~450A671/ A672
-/A50-/185-/345~485-/28-/345~485
CA55/A55205380~51527380~515
-/B55-/205-/380~515-/27-/380~515
CB60/B60220415~55025415~550
CB65/B65240450~58523450~585
CB70/B70260485~62021485~620
-/C55-/205-/380~515-/27-/380~515
CC60/C60220415~55025415~550
CC65/C65240450~58523450~585
CC70/C70260485~62021485~620