ASTM A210/A210M covers minimum-wall-thickness seamless medium-carbon steel boiler and superheater tubes, including boiler tubes, boiler flues, superheater flues and safe ends.
The standard includes two principal grades: Grade A-1 and Grade C. Grade C has higher specified carbon and manganese limits and higher minimum tensile and yield strength than Grade A-1.
Standard Title: Standard Specification for Seamless Medium-Carbon Steel Boiler and Superheater Tubes
Grade selection should follow the boiler design, project material specification or approved material list.
ASTM A210/A210M normally covers the following dimensions:
| Parameter | Size Range |
|---|---|
| Outside Diameter | 1/2–5 in. [12.7–127 mm] |
| Minimum Wall Thickness | 0.035–0.500 in. [0.9–12.7 mm] |
ASTM A210/A210M is a minimum-wall-thickness specification. The required minimum wall thickness should be clearly stated in the purchase specification.
| Element | Grade A-1 | Grade C |
|---|---|---|
| Carbon (C) | ≤0.27% | ≤0.35% |
| Manganese (Mn) | ≤0.93% | 0.29–1.06% |
| Phosphorus (P) | ≤0.035% | ≤0.035% |
| Sulfur (S) | ≤0.035% | ≤0.035% |
| Silicon (Si) | ≥0.10% | ≥0.10% |
ASTM A210 does not permit the addition of alloying elements other than those required for steel deoxidation where the addition would establish a grade different from the specified material.
| Property | Grade A-1 | Grade C |
|---|---|---|
| Minimum Tensile Strength | 415 MPa [60 ksi] | 485 MPa [70 ksi] |
| Minimum Yield Strength | 255 MPa [37 ksi] | 275 MPa [40 ksi] |
| Minimum Elongation in 2 in. or 50 mm | 30% | 30% |
For tubing with wall thickness less than 5/16 in. [8 mm], applicable calculated elongation requirements are determined in accordance with ASTM A210/A210M.
| Wall Thickness | Grade A-1 — Maximum Hardness | Grade C — Maximum Hardness |
|---|---|---|
| ≥0.200 in. [5.1 mm] | 143 HBW | 179 HBW |
| <0.200 in. [5.1 mm] | 79 HRBW | 89 HRBW |
The applicable delivery condition should be confirmed against the ordered grade and project specification.
Inspection and testing are carried out according to ASTM A210/A210M and the purchase specification.
Typical requirements include:
Additional UT or ET can be specified where required by the project.
Mill Test Certificates and applicable inspection records can be supplied with the order. Third-party inspection can be arranged upon request.
| Parameter | Capability |
|---|---|
| Grades | Grade A-1 / Grade C |
| Manufacturing | Cold Drawn / Cold Rolled |
| Outside Diameter | 6–114 mm |
| Wall Thickness | 0.8–25 mm |
| Length | Up to 40 m |
| Inspection | Hydrostatic / UT / ET as specified |
| Documentation | MTC / EN 10204 documentation / TPI as required |
| Third-Party Inspection | Available upon request |
| Custom Sizes | Subject to technical review |
| MOQ | According to grade, size and production requirements |
ASTM standard scope and FYN manufacturing capability are stated separately. Size availability and standard compliance are confirmed against the ordered grade, dimensions, heat treatment and inspection requirements.
ASTM A210 seamless medium-carbon steel tubes are primarily used for boiler and superheater pressure parts where the equipment or project specification calls for ASTM A210 material.
For pressure-containing heat-transfer surfaces in industrial and power boilers, including boiler heating surfaces.
For boiler flue applications covered by ASTM A210/A210M.
For superheater sections where seamless medium-carbon steel tubing is specified.
ASTM A210/A210M also covers safe ends used in boiler and superheater assemblies.
For boiler OEM production, pressure-part fabrication, replacement tube bundles and maintenance projects.
Final material selection should follow the applicable boiler design code, design temperature, pressure, steam conditions and project material specification.
Available documentation can include:
Required documentation should be specified during the RFQ stage.
Typical export packing includes:
Long-length tubes may require special packing and transportation arrangements.
Production lead time depends on grade, dimensions, quantity, heat treatment, testing and inspection requirements.
For quotation, please specify:
ASTM A210/A210M + Grade + OD × Minimum Wall Thickness × Length + Quantity
The required grade should be clearly identified as Grade A-1 or Grade C.
| Required Information | Details |
|---|---|
| Standard | ASTM A210/A210M |
| Grade | Grade A-1 / Grade C |
| Standard Edition | Required ASTM edition, if specified |
| Outside Diameter | Required outside diameter |
| Minimum Wall Thickness | Required minimum wall thickness |
| Length | Required tube length |
| Quantity | Required order quantity |
| Dimensional Tolerances | If applicable |
| Heat Treatment | If specified |
| Testing | Hydrostatic / NDT requirements |
| Documentation | MTC / EN 10204 requirements |
| Third-Party Inspection | If required |
| Delivery | Delivery destination |
For an accurate quotation, please send your required grade, outside diameter, minimum wall thickness, length and quantity.
For project enquiries, attach your tube list, drawing or technical specification for technical review, together with NDT, documentation and delivery requirements.
