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.
ASTM A672 :
| C | P | S | ||||||
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:
| Welding point tensile strength (N/mm2) | |||||||
| Yield point (N/mm2) | Tensile Stregth (N/mm2) | ||||||
| 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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