ASTM A672 C70 Carbon Steel EFW Pipe Manufacturer, Supplier, Exporter & Stockist in india

ASTM A672 includes a variety of material grades, each with specific mechanical and chemical properties. The C70 grade is one such grade, characterized by its carbon content, which is typically limited to 0.25% maximum. Pipe sizes within the scope of this specification range from NPS 1/2" (21.3mm) to NPS 24" (609.6mm), and wall thicknesses vary from Schedule 10 to Schedule XXS. Manufacturing and Testing: ASTM A672 mandates electric fusion welding as the primary manufacturing process. Pipes may undergo heat treatment as required by the material specification. They are subject to various testing procedures, including hydrostatic tests to ensure leak resistance, nondestructive tests for defect detection, and dimensional inspections to meet specified tolerances.

The chemical composition of ASTM A672 C70 and similar grades typically includes elements such as carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), nickel (Ni), chromium (Cr), molybdenum (Mo), and copper (Cu). These elements are carefully controlled to meet specific requirements, with typical maximum limits for each element. Mechanical Properties: ASTM A672 specifies minimum mechanical properties such as tensile strength, yield strength, and elongation. For C70 and similar grades, the tensile strength typically falls within the range of 485 to 620 MPa, while the yield strength ranges from 260 to 415 MPa. The minimum elongation requirement is generally 21% or more. Impact Test: Impact test requirements may vary depending on the specific grade within ASTM A672. It is essential to refer to the applicable grade's requirements for Charpy impact testing. Surface Finish and Coating: Pipes can be delivered with various surface finishes, including as rolled, shot blasted, or pickled and oiled. Coating options may include varnish, black paint, or anti-corrosion coatings, depending on the application and customer specifications. Tolerances: The specification outlines tolerances for wall thickness, length, straightness, and other dimensional parameters to ensure product quality. When working with ASTM A672 pipes, it is crucial to consult the latest edition of the ASTM A672 specification and collaborate closely with manufacturers to ensure compliance with specific project requirements and to obtain detailed product information.