ASTM A210 Specification for Seamless Carbon Boiler Tubes
The ASTM A210 standard specifies seamless carbon steel boiler tubes and superheater tubes, which are typically medium-carbon steel products. These tubes are used in a variety of applications, including safe end tubes, minimum wall thickness arch tubes, support tubes, and various tube sizes. The manufacturing process follows a seamless method, with the final product being either hot-rolled or cold-drawn. Surface conditions can be customized based on customer requirements.
Common delivery conditions include annealing, normalizing, and normalization followed by tempering. Surface treatments may involve oil immersion, varnish coating, passivation, phosphating, or shot blasting. These tubes are suitable for use in high, medium, and low-pressure boilers as well as other pressure-related applications.
Chemical Composition:
| Grade |
C (Max) |
Mn (Max) |
Si (Min) |
P (Max) |
S (Max) |
| A1 |
0.27 |
0.93 |
0.10 |
0.035 |
0.035 |
| C |
0.35 |
0.29–1.06 |
0.10 |
0.035 |
0.035 |
Mechanical Properties:
| Grade |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) |
| A1 |
≥ 415 |
≥ 255 |
≥ 30 |
| C |
≥ 485 |
≥ 275 |
≥ 30 |
Outer Diameter and Tolerance:
| Hot Rolled |
Outer Diameter, mm |
Tolerance, mm |
| OD ≤ 101.6 |
+0.4 / -0.8 |
| 101.6 < OD ≤ 127 |
+0.4 / -1.2 |
|
|
| Cold Drawn |
Outer Diameter, mm |
Tolerance, mm |
| OD < 25.4 |
±0.10 |
| 25.4 ≤ OD ≤ 38.1 |
±0.15 |
| 38.1 < OD < 50.8 |
±0.20 |
| 50.8 ≤ OD < 63.5 |
±0.25 |
| 63.5 ≤ OD < 76.2 |
±0.30 |
| 76.2 ≤ OD ≤ 101.6 |
±0.38 |
| 101.6 < OD ≤ 127 |
+0.38 / -0.64 |
|
|
Wall Thickness and Tolerance:
| Hot Rolled |
Outer Diameter, mm |
Tolerance, % |
| OD ≤ 101.6, WT ≤ 2.4 |
+40 / -0 |
| OD ≤ 101.6, 2.4 < WT ≤ 3.8 |
+35 / -0 |
| OD ≤ 101.6, 3.8 < WT ≤ 4.6 |
+33 / -0 |
| OD ≤ 101.6, WT > 4.6 |
+28 / -0 |
| OD > 101.6, 2.4 < WT ≤ 3.8 |
+35 / -0 |
| OD > 101.6, 3.8 < WT ≤ 4.6 |
+33 / -0 |
| OD > 101.6, WT > 4.6 |
+28 / -0 |
| Cold Drawn |
Outer Diameter, mm |
Tolerance, % |
| OD ≤ 38.1 |
+20 / -0 |
| OD > 38.1 |
+22 / -0 |
These specifications ensure that the tubes meet strict quality and performance standards, making them ideal for use in high-temperature and high-pressure environments. Whether you're looking for a specific grade, size, or finish, ASTM A210 provides a reliable solution for boiler and pressure vessel applications. Always consult with a qualified supplier to ensure the right material is selected for your project.
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