Seamless Medium-Carbon Pipes for High Pressure

A210 A210M Steel Tube

This specification covers seamless medium-carbon steel tubes for boilers, super-heaters, and other high-temperature pressure applications. The standard includes mechanical properties, chemical composition, and testing requirements.

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description

ASTM A210/A210M - Standard Specification for Seamless Medium-Carbon Steel Boiler and Super-heater Tubes

Scope

Ordering Information

Orders must specify:

l Quantity (length/number of tubes)

l Material grade (A-1 or C)

l Dimensions (outer diameter, wall thickness)

l Length (specific or random)

l Optional requirements (e.g., hydrostatic testing, non-destructive testing, certification)

Materials and Manufacture

- Steel-making Process: Open-hearth, electric furnace, or basic oxygen process.

- Heat Treatment: Tubes must be heat-treated (annealing, normalizing, or stress relieving).

Chemical Composition

| Element | Grade A-1 (%) | Grade C (%) |

| Carbon | 0.27 max | 0.35 max |

| Manganese | 0.29–1.06 | 0.29–1.06 |

| Phosphorus | 0.035 max | 0.035 max |

| Sulfur | 0.035 max | 0.035 max |

| Silicon | ≥0.10 | ≥0.10 |

Mechanical Properties

| Property | Grade A-1 | Grade C |

| Tensile Strength (min) | 415 MPa (60,000 psi) | 485 MPa (70,000 psi) |

| Yield Strength (min) | 255 MPa (37,000 psi) | 275 MPa (40,000 psi) |

| Elongation (min) | ≥30% (2 in.) | ≥30% (2 in.) |

Test Requirements

- Tensile Test: One test per lot (50 tubes max).

- Flattening Test: For tubes < 2⅜ in. (60.3 mm) OD.

- Hydrostatic or NDT: Each tube must undergo hydrostatic testing or non-destructive electric testing.

- Hardness Test: Optional, if specified.

Inspection and Certification

- Manufacturer must provide certification of compliance.

- Third-party inspection may be required if specified.

Marking

Tubes must be marked with:

- Manufacturer’s name or trademark

- Specification number (A210/A210M)

- Grade (A-1 or C)

- Heat number

- Size

Keywords

Seamless steel tubes, boiler tubes, super-heater tubes, medium-carbon steel, pressure applications.

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