ASTM A53/A53M Type S — Seamless carbon steel pipe
Grades
Gr.A, Gr.B
Chemical composition and mechanical properties
| Grade | Chemical composition | Mechanical properties |
|---|---|---|
| Gr.A | C≤0.14, Mn≤0.90, P≤0.035, S≤0.040 | Rm 310-415 MPa, Rp0.2 ≥165 MPa, A≥27% |
| Gr.B | C≤0.17, Mn≤1.20, P≤0.035, S≤0.040 | Rm 345-450 MPa, Rp0.2 ≥185 MPa, A≥25% |
Application scope
ASTM A53/A53M Type S specifies seamless carbon steel pipes for transporting general fluids such as steam, water, gas, and air. It is available in two grades, A and B, and in both galvanized and ungalvanized delivery forms. The standard specifies the composition, tensile and bending properties, flattening, and other processing properties, combining transport capability with a certain structural load-bearing capacity. It is suitable for medium- and low-pressure fluid pipelines and general-purpose piping with threaded or welded connections.
Typical applications
Commonly used in building and municipal water supply and drainage pipelines, gas pipelines, low-pressure steam and air pipelines, fire protection pipelines, and cable protection conduits; also used as structural pipes for railings, supports, etc. Grade B has slightly higher strength and wider applications. With its excellent pressure-bearing and sealing properties, and support for threaded, flanged, or welded connections, seamless pipe is suitable for medium to low pressure, versatile fluid transportation, and lightweight structural applications.
