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ASTM A210/A210M specifies seamless medium-carbon steel tubes for boilers and superheaters, including boiler flues, arch tubes and stay tubes. It covers Grades A-1 and C, which have different chemical composition and mechanical property requirements.
The specification defines requirements for chemical composition, mechanical properties, dimensions, manufacturing and inspection. Tubes are supplied in hot-finished or cold-finished conditions. Required tests include tensile, flattening, flaring and hardness tests, as well as hydrostatic or nondestructive electric testing as applicable.
ASTM A210/A210M differs from ASTM A178, which covers electric-resistance-welded carbon steel boiler and superheater tubes. The two standards specify different manufacturing processes and material requirements.
| Element | Grade A-1 (%) | Grade C (%) |
|---|---|---|
| Carbon, max. | 0.27 | 0.35 |
| Manganese | 0.93 max. | 0.29–1.06 |
| Phosphorus, max. | 0.035 | 0.035 |
| Sulfur, max. | 0.035 | 0.035 |
| Silicon, min. | 0.10 | 0.10 |
| Property | Grade A-1 | Grade C |
|---|---|---|
| Tensile Strength, min. | 415 MPa (60 ksi) | 485 MPa (70 ksi) |
| Yield Strength, min. | 255 MPa (37 ksi) | 275 MPa (40 ksi) |
| Elongation in 50 mm, min. | 30% | 30% |
| Specification | Details |
|---|---|
| Standard | ASTM A210/A210M |
| Outside Diameter | 12.7–127 mm commonly furnished |
| Minimum Wall Thickness | 0.9–12.7 mm commonly furnished |
| Manufacturing Process | Seamless |
| Delivery Condition | Hot-finished or cold-finished |
| Grades | A-1 and C |
| Tube Length | As specified in the purchase order |
ASTM A210/A210M requires killed steel and seamless tube manufacture. Tubes are supplied as hot-finished or cold-finished products, as specified in the purchase order.
Cold-finished tubes require heat treatment after the final cold-finishing operation in accordance with the applicable specification requirements.
(1) Hardness Limits
| Property | Grade A-1 | Grade C |
|---|---|---|
| Brinell Hardness, max. | 143 HBW | 179 HBW |
| Rockwell Hardness, max. | 79 HRBW | 89 HRBW |
(2) Required Tests
| Test | ASTM A210/A210M Requirement |
|---|---|
| Tensile Test | Required; tensile properties must meet the specified grade requirements. |
| Flattening Test | Required for specimens selected from finished tubes in accordance with the standard's sampling requirements. |
| Flaring Test | Required for specimens selected from finished tubes in accordance with the standard's sampling requirements. |
| Hardness Test | Brinell or Rockwell hardness testing; results must not exceed the limits listed above. |
| Hydrostatic Test | Each tube must be hydrostatically tested, unless the permitted alternative test is used. |
| Nondestructive Electric Test | May be used as an alternative to hydrostatic testing under the conditions specified by the standard. |
ASTM A210/A210M tubes are used in boiler and superheater assemblies, including superheater tubes, boiler flues, safe ends, arch tubes and stay tubes.
Superheater Tubes: Used in superheater sections to heat steam beyond its saturation temperature.
Boiler Flues, Safe Ends, Arch Tubes and Stay Tubes: Specified for these boiler components under ASTM A210/A210M.
Grade A-1 and Grade C are available for these applications. The choice between them depends on the mechanical property requirements and design conditions of the equipment.
| Technical Specification | ASTM A210/A210M | ASTM A192/A192M |
|---|---|---|
| Steel Classification | Medium-carbon steel | Carbon steel |
| Product Scope | Seamless boiler tube and superheater tubes; boiler flues, safe ends, arch tubes and stay tubes | Seamless boiler and superheater tubes for high-pressure service |
| Grades | A-1 and C | A192 specification requirements |
| Common Outside Diameter (OD) | 12.7–127 mm (0.5–5.0 in.) | 12.7–177.8 mm (0.5–7.0 in.) |
| Common Minimum Wall Thickness | 0.9–12.7 mm (0.035–0.500 in.) | 2.2–25.4 mm (0.085–1.000 in.) |
| Wall Thickness Basis | Minimum wall thickness | Minimum wall thickness |
For detailed chemical composition, mechanical properties and dimensional requirements, see our ASTM A192 Seamless Boiler Tube guide.
Q1. What is the difference between ASTM A210 Grade A-1 and Grade C?
Grade C has higher minimum tensile strength (485 MPa vs. 415 MPa) and yield strength (275 MPa vs. 255 MPa). The two grades also differ in chemical composition.
Q2. What is ASTM A210 used for?
ASTM A210/A210M covers seamless medium-carbon steel tubes for boilers and superheaters, including boiler flues, safe ends, arch tubes and stay tubes.
Q3. Are ASTM A210 and ASME SA-210 the same?
ASTM A210/A210M is published by ASTM International, while SA-210/SA-210M is used in the ASME Boiler and Pressure Vessel Code. Their technical requirements are closely related, but the applicable code edition and project requirements must be checked to confirm compliance.
EN 10216-2 Seamless Boiler Tube
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