What Is ASTM A671 Gr. CC60
ASTM A671 Gr. CC60 is an electric fusion welded (EFW) steel pipe manufactured to the ASTM A671 specification for electric-fusion-welded steel pipe for atmospheric and lower temperatures. GR stands for grade, CC indicates a carbon-manganese-silicon steel class, and 60 refers to the minimum yield strength of 60 ksi, approximately 414 MPa. The pipe is produced from steel plate formed into a cylinder and welded longitudinally, and the plate material corresponds to a pressure-vessel grade such as ASTM A516 Grade 60, which is the typical equivalent plate specification for this pipe grade.
Specification Overview
| Parameter | Range |
|---|---|
| Standard | ASTM A671 / A671M |
| Pipe type | EFW (electric fusion welded), longitudinal seam |
| Class designation | Class 10 to 73 depending on heat treatment and testing |
| Outside diameter | 12 to 64 in (approx. 305 to 1626 mm) |
| Wall thickness | 2 to 60 mm, SCH10 to XXS |
| Length | 5 to 14 m single or double random |
| Ends | Plain, beveled, grooved, or threaded |
| Surface treatment | Bare, black painting, varnish, galvanized, or coating |
| Testing | Hydrostatic, ultrasonic, radiographic, chemical and physical inspection |
Mechanical Properties
For A671 Gr. CC60, the minimum yield strength is 220 MPa (about 32 ksi) and the tensile strength is 415 to 550 MPa, with a minimum elongation of 25 percent. For comparison, CC65 has a yield strength of 240 MPa and a tensile range of 450 to 585 MPa, while CC70 has a yield of 260 MPa and a tensile range of 485 to 620 MPa. The weld joint tensile strength matches the base metal requirement, confirming full weld integrity.
Equivalent Grades
The primary plate equivalent for A671 Gr. CC60 is ASTM A516 Grade 60, a fine-grain killed carbon steel plate for pressure vessels. The A671 pipe is the electric fusion welded form of this material for high-pressure and lower-temperature service. Related pipe grades include CC65 and CC70 for higher strength requirements.
A671 vs A333
A671 is designed for atmospheric and higher temperature service with electric fusion welding, while A333 covers seamless and welded pipe for low-temperature service with fine-grain steels. A671 is widely used in oil and gas, petrochemical, and power generation; A333 is used in cold storage, cryogenic, and Arctic applications. The selection depends on the service temperature range and the required low-temperature toughness.
Frequently Asked Questions
Q: What does CC60 stand for in A671?
A: CC is the material class code for carbon-manganese-silicon steel, and 60 indicates the minimum yield strength level in ksi.
Q: What is the yield strength of A671 CC60?
A: The minimum yield strength is 220 MPa, with a tensile strength of 415 to 550 MPa and a minimum elongation of 25 percent.
Q: What is the difference between A671 and A672?
A: A671 covers pipe for atmospheric and lower temperature service, while A672 covers pipe for high-pressure service at moderate and lower temperatures. Both are electric fusion welded.
Q: What plate material is A671 CC60 made from?
A: The pipe is made from pressure-vessel plate equivalent to ASTM A516 Grade 60, a fine-grain killed carbon steel.
Q: What classes are available for A671 pipe?
A: Classes from 10 to 73 are defined by heat treatment condition and testing requirements, such as normalized, tempered, or quenched and tempered.
Q: Is A671 CC60 suitable for low-temperature service?
A: Yes, the specification covers atmospheric and lower temperature service; the applicable class and testing define the minimum design temperature.
For A671 Gr. CC60 pipe quotations with class, size, and testing requirements, contact our sales team.
