ASTM A210 Grade A1 Tubes – ASME SA210 Gr A-1 Seamless Boiler & Superheater Tubes
ASC LLP, Mumbai, supplies ASTM A210 Grade A1 tubes (ASME SA210 Gr A-1). These are seamless medium-carbon steel tubes for boilers and superheaters, from ½” to 5″ OD, hot-finished or cold-drawn, with EN 10204 3.1 certificates. See all our boiler tubes.
What is SA210 Grade A-1 Tube?
ASTM A210 / ASME SA210 covers seamless medium-carbon steel boiler tubes and boiler flues, including safe ends, arch and stay tubes, and superheater tubes, in sizes from about ½” to 5″ OD (12.7 – 127 mm) and 0.9 – 12.7 mm wall. The steel is killed carbon steel; no alloying elements may be added. There are two grades: A-1 (0.27% C max., 415 MPa tensile) and Grade C (0.35% C max., 485 MPa tensile).
Compared with SA192 (low carbon, 325 MPa tensile), SA210 A-1 is about 25% stronger. This allows thinner walls at the same pressure, which is why it is widely used for water-wall, economiser and boiler-bank tubes. For an overview of the specification see ASTM A210 pipes & tubes.
Key Features of SA210 Gr A-1 Tubes
- Higher strength than SA192: 415 MPa tensile and 255 MPa yield minimum.
- Seamless, killed steel: uniform structure for pressure service in boilers.
- Formable and weldable: 79 HRB maximum hardness allows bending, swaging and expanding into headers and drums.
- Hot-finished or cold-drawn: cold-drawn tubes give tighter tolerances and are heat-treated after drawing.
- Limits: plain carbon steel – for metal temperatures above about 450 °C, chrome-moly tubes such as T11 or T22 are normally used.
Types of A210 A-1 Tubes We Supply
- Boiler tubes – water-wall, riser, downcomer and boiler-bank tubes
- Economiser tubes – including tubes for finned or studded economisers
- Superheater and reheater tubes – for the lower-temperature sections
- Boiler flues, safe ends, arch and stay tubes
- U-bends and bent tubes – to drawing
For heat-exchanger and condenser tubes, the usual specification is SA179 rather than A210.
Applications of A210 Grade A1 Tubes
- Power plants: water walls, economisers, superheaters and boiler banks in utility boilers
- HRSGs: economiser and evaporator sections of heat-recovery steam generators
- Industrial boilers: water-tube and package boilers in sugar, paper, chemical and textile plants
- Refinery and petrochemical boilers: waste-heat and process steam boilers
SA210 Grade A-1 vs Grade C
| Property | SA210 Grade A-1 | SA210 Grade C |
| Carbon (C), max. | 0.27% | 0.35% |
| Manganese (Mn) | 0.93% max. | 0.29 – 1.06% |
| 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% |
| Hardness, max. | 79 HRB / 143 HB | 89 HRB / 179 HB |
Need higher strength? See A210 Grade C tubes.
SA210 Gr A-1 Tube Specifications
| Item | Details |
| Specification | ASTM A210 / ASME SA210, Grade A-1 (general requirements ASTM A450) |
| Type | Seamless – hot finished or cold drawn |
| Outside diameter | 12.7 – 127 mm (½” – 5″); other sizes on request |
| Wall thickness | 0.9 – 12.7 mm (0.035″ – 0.500″), average or minimum wall |
| Length | Fixed lengths to drawing, up to about 12 m+; random lengths |
| Heat treatment | Hot-finished: not required. Cold-finished: subcritical anneal, full anneal or normalise after final cold draw |
| Tests | Tension, flattening, flaring, hardness; hydrostatic or NDE on each tube |
| Ends | Plain, square-cut; bevelled on request |
| Certificate | EN 10204 3.1; IBR / third-party inspection on request |
Mechanical Properties of ASME SA210 Gr A1 Tube
| Property | ASTM A210 Grade A-1 |
| Tensile strength, min. | 415 MPa (60 ksi) |
| Yield strength, min. | 255 MPa (37 ksi) |
| Elongation in 50 mm, min. | 30% |
| Hardness, max. | 79 HRB (143 HB) |
Chemical Composition of ASTM A210 Gr A-1 Tubes
| Element | ASTM A210 Grade A-1 (%) |
| Carbon (C) | 0.27 max. |
| Manganese (Mn) | 0.93 max.* |
| Phosphorus (P) | 0.035 max. |
| Sulphur (S) | 0.035 max. |
| Silicon (Si) | 0.10 min. |
| Other elements | Not permitted to be added |
*For each 0.01% carbon below 0.27%, manganese may be increased by 0.06% above 0.93%, up to 1.35% max.
SA210 A-1 Boiler Tube Size & Weight Chart
| OD (mm) | OD (in) | 2.6 mm wall (kg/m) | 3.2 mm wall (kg/m) | 4.0 mm wall (kg/m) | 5.0 mm wall (kg/m) |
| 25.4 | 1″ | 1.46 | 1.75 | 2.11 | 2.52 |
| 31.8 | 1¼” | 1.87 | 2.26 | 2.74 | 3.30 |
| 38.1 | 1½” | 2.28 | 2.75 | 3.36 | 4.08 |
| 44.5 | 1¾” | 2.69 | 3.26 | 3.99 | 4.87 |
| 50.8 | 2″ | 3.09 | 3.76 | 4.62 | 5.65 |
| 57.0 | 2¼” (57 mm) | 3.49 | 4.25 | 5.23 | 6.41 |
| 63.5 | 2½” | 3.90 | 4.76 | 5.87 | 7.21 |
| 76.2 | 3″ | 4.72 | 5.76 | 7.12 | 8.78 |
Common boiler-tube sizes – any OD from 12.7 to 127 mm and wall from 0.9 to 12.7 mm can be supplied. Weights calculated for carbon steel: kg/m = 0.02466 × (OD − t) × t.
SA210 A-1 vs SA192, SA179, SA210 C & T11
| Specification | Material | Tensile / yield min. (MPa) | Main use |
| SA179 | Low-carbon, cold drawn | 325 / 180 (design) | Heat exchangers and condensers |
| SA192 | Low-carbon seamless | 325 / 180 | High-pressure boiler tubes |
| SA210 A-1 | Medium-carbon seamless | 415 / 255 | Boiler, economiser and superheater tubes |
| SA210 C | Medium-carbon seamless | 485 / 275 | Higher-strength boiler tubes |
| SA213 T11 | 1¼Cr-½Mo alloy | 415 / 205 | Superheater / reheater tubes at higher temperatures |
More detail: A179 vs A210 tubes.
Physical Properties
| Property | Value (approx.) |
| Density | 7.85 g/cm³ |
| Modulus of elasticity | ≈ 200 GPa |
| Thermal conductivity | ≈ 50 W/m·K |
| Magnetic | Yes |
Packing & Delivery
- Hexagonal bundles with steel straps, or wooden boxes for cold-drawn tubes
- Plastic end caps and rust-preventive oil or varnish
- Each tube marked with specification, grade, size, heat number and supplier
Why Buy SA210 Gr A-1 Tubes from ASC LLP?
- Certified material: ASTM A210 / ASME SA210 A-1 with EN 10204 3.1 certificates; IBR and third-party inspection on request.
- Sizes and lengths to drawing: exact boiler-tube lengths, U-bends on request.
- Full boiler tube range: SA192, SA210 C, T11 and more on our boiler tubes page; see also carbon steel seamless pipes and carbon steel tubes.
Send OD, wall (average or minimum), length, quantity and inspection requirements to sales@amardeepsteel.com, call 022-67439130 or contact us.
Frequently Asked Questions – A210 Grade A1 Tubes
What is SA210 Gr A1 tube?
SA210 Grade A-1 (ASTM A210 A-1) is a seamless medium-carbon steel tube for boilers, boiler flues and superheaters. It has a minimum tensile strength of 415 MPa, minimum yield of 255 MPa and maximum hardness of 79 HRB.
What is the chemical composition of SA210 Grade A1?
SA210 Grade A-1 contains carbon 0.27% max., manganese 0.93% max., phosphorus 0.035% max., sulphur 0.035% max. and silicon 0.10% min. Manganese may be increased up to 1.35% when carbon is lower.
What is the difference between SA210 A1 and SA210 C?
Grade C has higher carbon (0.35% max.) and manganese, giving higher strength: 485 MPa tensile and 275 MPa yield, compared with 415 MPa and 255 MPa for Grade A-1. Grade C has a hardness limit of 89 HRB versus 79 HRB for A-1.
What is the difference between SA210 A1 and SA192?
SA192 is a low-carbon (0.06–0.18% C) seamless boiler tube with 325 MPa tensile strength. SA210 A-1 is a medium-carbon tube with 415 MPa tensile strength, so thinner walls can be used for the same pressure.
What sizes are covered by ASTM A210?
ASTM A210 covers tubes from about 1/2″ to 5″ OD (12.7–127 mm) and 0.035″ to 0.500″ (0.9–12.7 mm) wall thickness. Other sizes may be supplied if they meet the other requirements of the specification.
Is SA210 A1 used for heat exchanger tubes?
SA210 is a boiler and superheater tube specification. Heat exchanger and condenser tubes are normally ordered to SA179 (seamless) or SA214 (welded).
Global Reach
ASC LLP supplies boiler tubes, pipes and fittings to boiler makers, power plants and EPC contractors in the USA, Europe, the Middle East and Asia, with secure packing and full documentation. Buyers worldwide rely on our A210 Grade A1 tubes for certified material and traceability.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
