ASTM A210 is the standard covers seamless medium-carbon steel boiler and superheater tubes. Seamless medium carbon steel pipe for boiler tube and boiler flue pipe, including a minimum wall thickness of the security side, the dome and the support tube and superheater tubes.
ASTM A210/ASME SA210 Standard Specification for Seamless Medium-Carbon Steel Boiler and Superheater Tubes.
Mechanical Properties:
| Grade | C(Max) | Mn | Si(Min) | P(Max) | S(Max) |
| A1 | 0.27 | Max.0.93 | 0.10 | 0.035 | 0.035 |
| C | 0.35 | 0.29~1.06 | 0.10 | 0.035 | 0.035 |
Chemical composition:
| Grade | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation (%) |
| A1 | ≥ 415 | ≥ 255 | ≥ 30 |
| C | ≥ 485 | ≥ 275 | ≥ 30 |
Outside Diameter & Tolerance
| Pcorcess | Outside Diameter , mm | Tolerance, % |
|---|---|---|
| Hot rolled | OD≤101.6 | +0.4/-0.8 |
| 101.6＜OD≤127 | +0.4/-1.2 | |
| Cold Drawn | 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 & Tolerance
| Pcorcess | Outside Diameter , mm | Tolerance, % |
|---|---|---|
| Hot rolled | 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 | OD≤38.1 | +20/-0 |
| OD>38.1 | +22/-0 |
ASTM A210 / A210M Tube Wall Thickness Tolerance
| Seamless, Cold-Finished Tubes | ||
| Outside Diameter In. (mm) | Wall thickness Tolerance % | |
| Over (+) | Under (-) | |
| 1 ½ (38.1) and under | 20 | 0 |
| Over 1½ (38.1) | 22 | 0 |
ASTM A210 / A210M Tube Outside Diameter Tolerance
| Cold-Finished Seamless Tubes | ||
| Outside Diameter In. (mm) | Permissible Variations In. (mm) | |
| Over (+) | Under (-) | |
| Under 1 (25.4) | 0.004 (0.10) | 0.004 (0.10) |
| 1 to 1 ½ (25.4 to 38.1), Incl | 0.006 (0.15) | 0.006 (0.15) |
| Over 11⁄2 to 2 (38.1 to 50.8), Excl | 0.008 (0.20) | 0.008 (0.20) |
| 2 to 21⁄2 (50.8 to 63.5), Excl | 0.010 (0.25) | 0.010 (0.25) |
| 21⁄2 to 3 (63.5 to 76.2), Excl | 0.012 (0.30) | 0.012 (0.30) |
ASTM A210 / A210M Tube Cut Length Tolerance
| Cold-Finished Seamless Tubes | ||
| Outside Diameter, In.(mm) | Cut Length, in.(mm) | |
| Over (+) | Under (-) | |
| All Sizes | 3⁄16 [5] | 0 [0] |
| Under 2 (50.8) | 1⁄8 [3] | 0 [0] |
| 2 (50.8) and over | 3⁄16 [5] | 0 [0] |
| Under 2 (50.8) | 1⁄8 [3] | 0 [0] |
| 2 (50.8) and over | 3⁄16 [5] | 0 [0] |
| These permissible variations in length apply to tubes before bending. They apply to cut lengths up to and including 24 ft [7.3 m]. For lengths greater than 24 ft [7.3 m], the above over-tolerances shall be increased by 1⁄8 in. [3 mm] for each 10 ft [3 m] or fraction thereof over 24 ft or 1⁄2 in. [13 mm], whichever is the lesser. | ||
ASTM A210 / A210M Tube Hydrostatic Test Pressures
Each tube shall be subjected to the hydrostatic pressure test, or instead of this test, a nondestructive test may be used when specified by the purchaser.
| Hydrostatic Test Pressures | |
| Outside Diameter of Tube, in. [mm] | Hydrostatic Test Pressure, psi [MPa] |
| Under 1 [25.4] | 1000 [7] |
| 1 to 11⁄2 [25.4 to 38.1], excl | 1500 [10] |
| 11⁄2 to 2 [38.1 to 50.8], excl | 2000 [14] |
| 2 to 3 [50.8 to 76.2], excl | 2500 [17] |
ASTM A210 / A210M Flattening Test
One flattening test shall be made on specimens from each end of one finished tube from each lot, but not the one used for the flaring test. Tears or breaks occurring at the 12 or 6 o’clock positions on Grade C tubing with sizes of 2.375 in. [60.3 mm] in outside diameter and smaller shall not be considered a basis for rejection.
ASTM A210 / A210M Flaring Test
One flaring test shall be made on specie- men from each end of the one finished tube from each lot, but not the one used for the flattening test.
One flaring test shall be made on specie- men from each end of the one finished tube from each lot, but not the one used for the flattening test.
Ordering Information
Orders for ASTM A210 / A210M, ASME SA210 should include the following, as required, to describe the desired material adequately:
Orders for ASTM A210 / A210M, ASME SA210 should include the following, as required, to describe the desired material adequately:
- Quantity (feet, meters, or number of lengths),
- Name of material (seamless tubes),
- Grade,
- Manufacture (hot-finished or cold-finished),
- Size (outside diameter and minimum wall thickness),
- Length (specific or random),
- Optional requirements,
- Test report required (see section on Certification of Specification A 450/A 450M),
- Specification designation,
- Special requirements.
When these products are to be used in applications conforming to ISO Recommendations for Boiler Construction, the requirements of Specification ASTM A 520 , shall supplement and supersede the requirements of this specification.
The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining value from the two systems may result in nonconformance with the specification. The inch-pound units shall apply unless the "m" designation of this specification is specified in the order.
Note:
- Mill test certificates will be issued according to EN10204.3 3.1 or 3.2
- The tubes Shall be Seamless, and the testing shall be as per A 450 / A450M.
Delivery Condition:
- Annealed, Normalized, Normalized and Tempered
- Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.
Surface treatment:
- Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
Application:
- For high, middle, low pressure boiler and pressure purpose
