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ASTM A672 EFW Pipes & Tubes

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  • ASTM A672 EFW Pipes & Tubes
Development Tendency of Seamless Steel Pipes in 2017
February 24, 2017
20MnCr5
February 24, 2017

ASTM A672 EFW Pipes & Tubes

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 :

Specification Steel grade Chemical composition Remarks
C Si Mn P S Ti
Pipes for pressure service
ASTM A671, A672
-/A45 -/0.17 – 0.98 0.035 0.035 – A671/
A672
-/A50 -/0.22 –
CA55/A55 0.28 –
-/B55 -/0.20 0.13
~0.45
CB60/B60 0.24
CB65/B65 0.28
CB70/C70 0.31 1.30
-/C55 -/0.18 0.55
~0.98
CC60/C60 0.21
CC65/C65 0.24 0.79
~1.30
CC70/C70 0.27

 

Mechanical Properties of ASTM A672:

Products Steel Grade BASE METAL MECHANICAL COMPOSITION Welding point tensile
strength (N/mm2)
Remarks
Yield point
(N/mm2)
Tensile Stregth
(N/mm2)
Test Pieces Elongation (%)
Pipes for pressure
service ASTM A671
, A672
-/A45 -/165 -/310~450 – -/30 -/310~450 A671/ A672
-/A50 -/185 -/345~485 -/28 -/345~485
CA55/A55 205 380~515 27 380~515
-/B55 -/205 -/380~515 -/27 -/380~515
CB60/B60 220 415~550 25 415~550
CB65/B65 240 450~585 23 450~585
CB70/B70 260 485~620 21 485~620
-/C55 -/205 -/380~515 -/27 -/380~515
CC60/C60 220 415~550 25 415~550
CC65/C65 240 450~585 23 450~585
CC70/C70 260 485~620 21 485~620

 

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