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The ASTM A210/ASME SA210 specification covers seamless medium-carbon steel boiler and superheater tubes, including minimum-wall-thickness tubing sizes, boiler flues, safe ends, arch, and stay tubes. The specification outlines the required tensile and hardness properties, but these apply only within certain size limitations. Manufacturing of these tubes must use the "killed" process, and they must be seamless, marked as either hot-finished or cold-finished. The surface condition must be explicitly stated in the order, and the chemical composition must meet specific requirements, with no allowance for unlisted elements.
Several tests must be performed on the specimens, including tension, flattening, flaring, hardness, and either hydrostatic or nondestructive electric testing. Superheater tubes must be free of defects and capable of withstanding processes such as expansion, beading, forging, welding, and bending.
ASTM A210 Overview:
Material: Seamless medium-carbon steel, designed for boiler tubes and superheater applications.
Applications: High, medium, and low-pressure boilers, as well as pressure-related purposes.
Testing Requirements:
Flattening Test: Conducted on one specimen from each end of a finished tube from each lot. For Grade C tubes with an outer diameter of 2.375 inches (60.3 mm) or smaller, tears or breaks at the 12 or 6 o'clock positions are not grounds for rejection.
Flaring Test: One flaring test is required for each end of the finished tube from each lot, excluding the specimen used for the flattening test.
Ordering Information:
Orders for ASTM A210/ASME SA210 must include:
Quantity (in feet, meters, or lengths),
Material (seamless pipes),
Grade,
Manufacturing process (hot-finished or cold-finished),
Size (outside diameter and minimum wall thickness),
Length (specific or random),
Optional requirements (e.g., special testing or certification),
Test report requirements,
Specification designation,
Any special instructions.
If the pipes are for boiler construction following ISO Recommendations, ASTM A520 requirements will supplement or supersede ASTM A210.
Units:
The standard allows the use of both inch-pound and SI units, but these should not be combined as they are not exact equivalents.
Certification and Testing:
Mill test certificates will be issued according to EN10204.3 3.1 or 3.2 standards, and testing shall adhere to ASTM A450/A450M requirements.
Delivery Conditions:
The pipes can be delivered in the following conditions:
Annealed,
Normalized,
Normalized and tempered.
Each crate will be marked with the order number, heat number, dimensions, weight, and bundle details or as requested.
Surface Treatment Options:
Oil-dip,
Varnish,
Passivation,
Phosphating,
Shot blasting.
Mechanical Properties:
|
Grade |
C(Max) |
Mn |
Si(Min) |
P(Max) |
S(Max) |
|
A1 |
0.27 |
Max.0.93 |
0.1 |
0.035 |
0.035 |
|
C |
0.35 |
0.29~1.06 |
0.1 |
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 |
-0.5 |
|
101.6＜OD≤127 |
-0.333333333 |
|
|
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 |
-0.59375 |
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 |
Wall thickness Tolerance % |
|
|
In. (mm) |
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 |
Permissible Variations In. (mm) |
|
|
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
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.
|
Cold-Finished Seamless Tubes |
||
|
Outside Diameter, |
Cut Length, in.(mm) |
|
|
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] |
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] |
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