ASTM A672 C70 Carbon Steel EFW Pipe
What material is A672 C70 welded pipe?
The chemical composition of ASTM A672 C70 welded steel pipe includes a maximum of 0.25 carbon, 0.98 manganese, 0.64 molybdenum and 0.45 silicon. It allows certain mechanical properties such as yield strength (Mpa) 37 and tensile strength (Mpa) 65.
ASTM A672 standard specifies requirements for welded steel pipe for buried or submerged service, including spiral seam submerged arc welded steel pipe and longitudinal seam submerged arc welded steel pipe. C70 is a grade in the standard that represents the mechanical properties and chemical composition requirements for steel pipes.
The C70 grade usually refers to the yield strength grade of the steel pipe, that is, the stress value at which the steel pipe begins to undergo plastic deformation when subjected to a certain external force. C70 indicates that the pipe has a yield strength of approximately 485 MPa (approximately 70 ksi). A manufacturing method in which seams are welded together. This method is suitable for producing large diameter and thick wall steel pipes.
ASTM A672 C70 Carbon Steel Pipe is commonly used in oil, gas, water and other fluid transfer systems, especially where buried or submerged service is required. C70 straight seam carbon steel pipe usually requires anti-corrosion treatment, such as coating or cathodic protection, to increase its service life in corrosive environments.
ASTM A672 CC70 PIPE CHEMICAL COMPOSITION
| Specification | Steel grade | Chemical composition | Remarks | |||||
| C | Si | Mn | P | S | Ti | |||
| Pipes for pressure service ASTM A672 | CB70/C70 | 0.31 | 0.13 ~ 0.45 | 1.30 | 0.035 | 0.035 | - | A672 |
ASTM A672 CC70 EFW PIPE MECHANICAL PROPERTIES
| 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 A672 | CC70/C70 | 260 | 485~620 | - | 21 | 485~620 | A672 |
Straight seam resistance welded pipe
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