ASTM A210 ASME SA210 GRADE A1 Seamless Tubes
Carbon Steel Boiler & Heat Exchanger Tubes
ASTM A210 / ASME SA210 Grade A1 seamless tubes are carbon steel boiler and heat-exchanger tubes designed for low- and medium-temperature pressure service. Manufactured to ASTM A210 and adopted by ASME as SA210, Grade A1 tubes provide good mechanical strength, uniform wall thickness, and excellent heat transfer performance, making them widely used in boilers, superheaters, economizers, and heat exchangers.
Grade A1 is one of the most commonly specified carbon steel boiler tube grades for power generation and industrial thermal systems.
What Is ASTM A210?
ASTM A210 is the standard specification for seamless medium-carbon steel boiler and superheater tubes.
It covers two grades:
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Grade A1 – standard boiler tube grade
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Grade C – higher carbon and higher strength
ASTM A210 is adopted by ASME as SA210 for pressure equipment under the ASME Boiler & Pressure Vessel Code (BPVC).
Material Grade: SA210 Grade A1
SA210 Grade A1 is a medium-carbon steel designed for reliable service in boiler and heat-transfer applications.
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Product Type: Seamless carbon steel tube
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Manufacturing Process: Hot finished or cold drawn
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Delivery Condition: Annealed or normalized
SA210 CHEMICAL COMPOSITION
| TABLE 1 CHEMICAL 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 |
SA210 TENSILE REQUIREMENTSTABLE 3 TENSILE REQUIREMENTS |
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| Requirement | Grade A-1 | Grade C |
| Tensile strength, min, ksi [MPa] | 60 [415] | 70 [485] |
| Yield strength, min, ksi [MPa] | 37 [255] | 40 [275] |
| Elongation in 2 in. or 50 mm, min, % | 30 | 30 |
| Deduction per each 1/32 in. wall decrease | 1.50 | 1.50 |
| Elongation with 4D gage length | 22 | 20 |
| TABLE 2 NUMBER OF TUBES IN A LOT HEAT TREATED BY THE CONTINUOUS PROCESS | |
| Size of Tube | Size of Lot |
| 2 in. (50.8 mm) and over in diameter and 0.200 in. (5.1 mm) and over in wall thickness | not more than 50 tubes |
| 2 in. (50.8 mm) and over in outside diameter and under 0.200 in. (5.1 mm) in wall thickness | not more than 75 tubes |
| Less than 2 in. (50.8 mm) but over 1 in. (25.4 mm) in outside diameter or over 1 in. in outside diameter and under 0.200 in. (5.08 mm) in wall thickness | not more than 75 tubes |
| 1 in. (25.4 mm) or less in outside diameter | not more than 125 tubes |
Size Range & Specifications
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Outside Diameter: 12.7 mm – 127 mm (1/2″ – 5″)
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Wall Thickness: 1.2 mm – 12 mm
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Length: Random length or fixed length
(Custom sizes available upon request
Heat Treatment
ASTM A210 Grade A1 seamless tubes are supplied in the annealed or normalized condition, ensuring:
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Stable mechanical properties
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Good ductility and weldability
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Reliable performance in boiler service
Testing & Inspection
ASTM A210 / SA210 Grade A1 tubes are subject to:
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Chemical analysis
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Tensile testing
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Flattening and flaring tests
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Hydrostatic or eddy current testing
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Dimensional inspection
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Visual inspection
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Certification: EN 10204 3.1 / ASME MTR
Typical Applications
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Boilers and superheaters
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Economizers
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Heat exchangers and condensers
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Power generation plants
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Industrial steam systems
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Pressure vessels
ASTM A210 ASME SA210 GRADE A1 Seamless Tubes
ASTM A210 ASME SA210 GRADE A1 Seamless Tube
SA210 Grade A1 vs Grade C
| Item | Grade A1 | Grade C |
|---|---|---|
| Carbon Content | Lower | Higher |
| Strength | Moderate | Higher |
| Typical Use | Boilers / HX | High-pressure boilers |
ASTM A210 / ASME SA210 Grade A1 seamless tubes offer a reliable, cost-effective solution for boiler and heat exchanger applications operating at low to medium temperatures. With consistent quality, good weldability, and full compliance with ASTM and ASME standards, SA210 Grade A1 tubes remain a trusted choice for power plants and industrial thermal systems worldwide.
