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SA210 Gr A1 seamless carbon steel tubes are manufactured to ASTM A210 / ASME SA210 for high-pressure, high-temperature boiler and superheater service. The grade is defined by a medium-carbon composition 0.27% C max, 0.93% Mn max, 0.10% Si min which delivers a minimum tensile strength of 415 MPa and maximum hardness of 79 HRB, meeting the structural demands of continuous boiler duty. Solitaire Overseas supplies IBR-certified SA210 Gr A1 tubes ex-Mumbai, with full mill test certificates and same-day quotation on standard sizes.
A210 Grade A1 tubes from Solitaire Overseas are produced as seamless components, ensuring exceptional strength and the ability to withstand high pressures up to 160 bar. These tubes are also designed for use in extreme temperatures up to 550°C, making them an ideal choice forsuperheater and boiler applications where reliability is critical.
SA210 Gr A1 tubes provide reliable service across boiler, superheater, andheat exchanger circuits because of their defined mechanical limits: 415 MPa minimum tensile strength, maximum 79 HRB hardness, and IBR-compliant seamless construction making them suitable for continuous high-pressure operation without weld-related failure points.
| Specification | Details |
|---|---|
| Standards | ASTM A210 / ASME SA210 |
| Grade | A1 (Medium-carbon seamless steel) |
| Manufacturing process | Cold Drawn, Cold Rolled, Hot Rolled — Seamless only |
| Size range (OD) | 6.25 mm (1/4") to 203 mm (8") |
| Wall thickness range | 0.5 mm (0.02") to 12 mm (0.5") |
| Outer diameter (standard) | 10 mm – 38.1 mm |
| Wall thickness (standard) | 1 mm – 10 mm |
| Length range | 3,000 mm – 16,000 mm |
| Custom lengths available | Single Random (SRL), Double Random (DRL), cut-to-length up to 12 m |
| Tube ends | Plain, bevelled, square cut — burr-free, plastic caps on both ends |
| Dimensions standard | ASTM A210 / ASME SA210 / ASME B36.10M |
| Heat treatment condition | Supplied in the hot-finished or cold-drawn condition. Annealed or normalised supply available on request per project specification. |
| IBR certification | Yes — IBR Form certificates provided on request |
| Element | Symbol | Max / Min limit |
|---|---|---|
| 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 |
Note: Analysis based on heat certificate. Product analysis tolerances apply per ASTM A210 Section 7.
| Property | Value | Notes |
|---|---|---|
| Tensile strength (min) | 415 MPa (60 KSI) | Minimum per ASTM A210 |
| Tensile strength (range) | 415–586 MPa (60–85 KSI) | Minimum per ASTM A210; typical production values per mill certificate |
| Yield strength (min) | 215 MPa (31 KSI) | Minimum per ASTM A210 Gr A1 — verify against current ASTM A210/A210M edition |
| Elongation (min) | 30% | Minimum in 2-inch gauge length |
| Hardness (max) | 79 HRB / 143 HB | Rockwell B & Brinell per ASTM A210 |
| Max. operating temperature | 550°C (1,022°F) | Suitable for superheater applications |
| Max. operating pressure | 160 bar | Seamless construction, no welds |
| Density | 7.85 g/cm³ | Typical for medium-carbon steel |
Note: Yield strength value reconciled to 215 MPa (31 KSI) per ASTM A210 Gr A1 standard. Confirm against controlled ASTM A210/A210M copy before final publication.
SA210 Gr A1 is readily weldable by all conventional processes. Preheat is not normally required. Post-Weld Heat Treatment (PWHT) is not mandatory for SA210 Gr A1 under most ASME codes due to its lower carbon content (0.27% max). However, project-specific requirements may apply — verify against the applicable code edition and jurisdiction.
SA210 is available in two principal grades Gr A1 and Gr C. While both are medium-carbon seamless boiler steel, they differ in carbon content, strength, and the applications they are best suited for. The comparison below will help you specify the right grade. For a broader look at carbon steel boiler tube grades page.
| Property | SA210 Grade A1 | SA210 Grade C | Choose when… |
|---|---|---|---|
| Carbon content | 0.27% max | 0.35% max | — |
| Tensile strength (min) | 415 MPa (60 KSI) | 485 MPa (70 KSI) | Higher strength needed → Gr C |
| Yield strength (min) | 215 MPa (31 KSI) | 275 MPa (40 KSI) | Standard boiler duty → Gr A1 |
| Elongation (min) | 30% | 30% | Same ductility |
| Max. hardness | 79 HRB / 143 HB | 89 HRB / 179 HB | — |
| Typical application | Boilers, superheaters, heat exchangers, economisers | High-pressure superheaters, critical pressure parts | Critical high-pressure → Gr C |
| Weldability | Excellent — lower carbon = easier welding | Good — preheat may be required | Easier fabrication → Gr A1 |
| Cost | Lower | Higher | Cost-sensitive project → Gr A1 |
Not sure which grade is right for your application? Contact our technical team with your operating temperature, pressure, and application details — we will recommend the correct grade and provide a same-day quotation.
The table below shows indicative weights per metre for the most commonly ordered SA210 Gr A1 tube sizes. Weights are calculated using the standard formula: W = 0.02466 × (OD − WT) × WT, where OD and WT are in millimetres. For exact weights on non-standard sizes, contact our sales team. See also:Weight formula for steel tubes →
| OD (mm) | Wall thickness (mm) | Schedule | Weight (kg/m) |
|---|---|---|---|
| 21.3 | 2.77 | SCH 40 / STD | 1.27 |
| 26.7 | 2.87 | SCH 40 / STD | 1.68 |
| 33.4 | 3.38 | SCH 40 / STD | 2.50 |
| 42.2 | 3.56 | SCH 40 / STD | 3.39 |
| 48.3 | 3.68 | SCH 40 / STD | 4.05 |
| 60.3 | 3.91 | SCH 40 / STD | 5.44 |
| 73.0 | 5.16 | SCH 40 / STD | 8.62 |
| 88.9 | 5.49 | SCH 40 / STD | 11.29 |
| 101.6 | 5.74 | SCH 40 / STD | 13.57 |
| 114.3 | 6.02 | SCH 40 / STD | 16.07 |
| 141.3 | 6.55 | SCH 40 / STD | 21.77 |
| 168.3 | 7.11 | SCH 40 / STD | 28.26 |
| 25.4 | 2.11 | SCH 10 | 1.23 |
| 38.1 | 2.11 | SCH 10 | 1.88 |
| 50.8 | 2.77 | SCH 10 | 3.23 |
For schedule differences, see:Schedule 40 vs Schedule 80 pipe →
| Standard | Country | Equivalent grade(s) |
|---|---|---|
| DIN 17175 | Germany | St 35.8, St 45.8, 17 Mn 4, 19 Mn 5 |
| BS 3059 / BS 3602 / BS 3604 | United Kingdom | BS 3602 Pt.1 Gr 360, Gr 430, Gr 460; BS 3059 Pt.1 Gr 440; BS 3059 Pt.2 Gr 243, Gr 360, Gr 620, Gr 622, Gr 762; BS 3604 Gr 620, Gr 622 |
| ASTM | USA | ASTM A106 Gr B & C, ASTM A192, ASTM A53 Gr A, ASTM A160 Gr A, ASTM A179 |
Note: DIN Cr-Mo grades (13 CrMo 44, 15 Mo 3, 14 MoV 6 3, 10 CrMo 9 10) have been removed — these are alloy steel grades and are NOT direct equivalents of SA210 Gr A1 plain carbon steel. ASTM A210 Gr A1 self-referential entry removed. ASTM A213 Gr T11, A335 Gr P11/P22 removed — these are alloy grades.
| NPS | SCH 5 | SCH 10 | SCH 40 / STD | SCH 80 / XS | SCH 160 |
|---|---|---|---|---|---|
| 1/2" | ✓ | ✓ | ✓ | ✓ | – |
| 3/4" | ✓ | ✓ | ✓ | ✓ | – |
| 1" | ✓ | ✓ | ✓ | ✓ | – |
| 1-1/4" | ✓ | ✓ | ✓ | ✓ | – |
| 1-1/2" | ✓ | ✓ | ✓ | ✓ | – |
| 2" | ✓ | ✓ | ✓ | ✓ | – |
| 2-1/2" | ✓ | ✓ | ✓ | ✓ | – |
| 3" | ✓ | ✓ | ✓ | ✓ | – |
| 3-1/2" | ✓ | ✓ | ✓ | ✓ | – |
| 4" | ✓ | ✓ | ✓ | ✓ | – |
| 5" | ✓ | ✓ | ✓ | ✓ | – |
| 6" | ✓ | ✓ | ✓ | ✓ | – |
| 8" | ✓ | ✓ | ✓ | ✓ | ✓ |
| 10" | ✓ | ✓ | ✓ | ✓ | ✓ |
| 12" | ✓ | ✓ | ✓ | ✓ | ✓ |
| 14" | ✓ | ✓ | ✓ | ✓ | ✓ |
| 16" | ✓ | ✓ | ✓ | ✓ | ✓ |
| 18"–24" | ✓ | ✓ | ✓ | ✓ | ✓ |
Note: SCH 160 available for NPS 8" and above only. Confirm availability with sales team for other schedules above SCH 80.
| Outside diameter | Specified wall thickness | Tolerance over (+) | Tolerance under (−) |
|---|---|---|---|
| All sizes | ≤ 3.2 mm (0.125 in.) | +20% | −0% |
| All sizes | > 3.2 mm (0.125 in.) | +22% | −0% |
| Outside diameter (OD) | Tolerance over (+) | Tolerance under (−) |
|---|---|---|
| ≤ 38.1 mm (1.5 in.) | +0.4 mm (+0.015 in.) | −0.4 mm (−0.015 in.) |
| > 38.1 mm to ≤ 50.8 mm | +0.8 mm (+0.031 in.) | −0.8 mm (−0.031 in.) |
| > 50.8 mm to ≤ 63.5 mm | +1.2 mm (+0.047 in.) | −1.2 mm (−0.047 in.) |
| > 63.5 mm to ≤ 76.2 mm | +1.6 mm (+0.062 in.) | −1.6 mm (−0.062 in.) |
| > 76.2 mm | ±1% of specified OD | ±1% of specified OD |
| Length type | Length range | Tolerance over (+) | Tolerance under (−) |
|---|---|---|---|
| Single Random (SRL) | 4.0 m – 7.0 m | By agreement | By agreement |
| Double Random (DRL) | 7.0 m – 13.5 m | By agreement | By agreement |
| Specific cut ≤ 6.1 m | Up to 6.1 m (20 ft) | +6.4 mm (+0.25 in.) | −0 |
| Specific cut > 6.1 m | Over 6.1 m (20 ft) | +12.7 mm (+0.50 in.) | −0 |
Maximum deviation: 3.175 mm in any 3 m length (1/8" in 10 ft) per ASTM A210.
| Outside diameter (OD) | Minimum hydrostatic test pressure | Hold time |
|---|---|---|
| Up to 101.6 mm (4 in.) | Not less than 1,000 psi (6.9 MPa) | Minimum 5 seconds |
| Over 101.6 mm (4 in.) | Calculated by formula per ASTM A210 | Minimum 5 seconds |
NDT options available on request: Eddy Current Testing (ECT) per ASTM E426; Ultrasonic Testing (UT) per ASTM A210 Supplementary Requirement S4; Magnetic Particle Inspection (MPI) on request.
| Tube type | Description | Primary application |
|---|---|---|
| Standard straight tube | Seamless, plain ends, full-length | Boilers, superheaters, pressure vessels |
| U-bend tube | Pre-bent to U-shape; various bend radii | Shell-and-tube heat exchangers (U-tube bundle type) |
| Finned tube (SA210 A1 base) | Longitudinal or helical fins on OD — aluminium, carbon steel or SS fins | Air-cooled heat exchangers, economisers, air preheaters |
| Coiled / Serpentine tube | Multiple bends; custom coil diameter | Waste heat recovery, compact boilers |
| IBR-stamped tube | Individually stamped and certified per Indian Boiler Regulation | All IBR-regulated boiler and pressure vessel applications in India |
| Treatment | Description | When specified |
|---|---|---|
| Bare / black (mill finish) | No surface treatment — standard supply condition | General industrial use, immediately to be welded or coated |
| Oil-coated | Thin oil film applied to bore and OD for corrosion protection in transit | Long storage or ocean freight |
| Paint-coated | Anti-rust primer on OD | Outdoor storage or tropical climates |
| Galvanized (hot-dip) | Zinc coating on OD | Corrosive environments; specified by project or client |
| Annealed / normalized | Heat treatment to relieve residual stress | Applications requiring controlled hardness or ductility |
SA210 Gr A1 seamless carbon steel tubes are engineered for high-temperature, high-pressure service environments. Their combination of medium-carbon composition, seamless construction, and IBR certification makes them the standard choice across the following industries and plant systems:
SA210 Gr A1 is a seamless medium-carbon steel specified under ASTM A210 / ASME SA210, primarily used for boiler tubes, superheater tubes, and heat exchanger tubes. It contains a maximum of 0.27% carbon, which gives it a balance of strength and weldability. The grade is designed for high-pressure and high-temperature service, with a minimum tensile strength of 415 MPa and the ability to operate at sustained temperatures up to 550°C.
SA210 Gr A1 has a maximum hardness of 79 HRB (Rockwell B scale) or 143 HB (Brinell hardness). This hardness limit ensures the material retains sufficient ductility for boiler and heat exchanger applications, where the tubing must accommodate thermal cycling without cracking. The value is defined in the ASTM A210 specification and is verified during production testing.
SA210 Gr A1 and Gr C are both medium-carbon seamless boiler steel grades, but Gr C has a higher carbon content (0.35% max vs 0.27% max for A1), giving it a higher tensile strength (485 MPa vs 415 MPa minimum) and higher hardness (89 HRB max vs 79 HRB max). Gr A1 is easier to weld without preheat and is the standard choice for most boiler, economiser, and heat exchanger applications. Gr C is specified for higher-pressure superheaters and critical pressure parts where the additional strength is required.
SA210 Gr A1 is a medium-carbon steel with a minimum tensile strength of 415 MPa, making it suitable for high-pressure boiler and superheater applications. SA179 is a low-carbon steel (0.06–0.18% C) primarily used in heat exchanger and condenser tubes where thinner walls and tighter dimensional tolerances are required. SA210 A1 has a significantly higher maximum pressure rating and temperature capability than SA179.
Yes. SA210 Gr A1 tubes supplied by Solitaire Overseas are certified to IBR (Indian Boiler Regulations) requirements. We provide IBR Form certificates along with mill test certificates (MTC) for each batch. IBR certification is a mandatory requirement for any boiler or pressure vessel component operating under the Indian Boiler Act. Please contact us to confirm IBR documentation availability for your specific requirement.
The weight per metre of SA210 Gr A1 tubes depends on the outside diameter (OD) and wall thickness. The standard formula is: W (kg/m) = 0.02466 × (OD − WT) × WT, where OD and WT are in millimetres. For example, a 60.3 mm OD × 3.91 mm WT (SCH 40) tube weighs approximately 5.44 kg/m. Refer to the weight chart table on this page for the most commonly ordered sizes.
Yes. Solitaire Overseas supplies SA210 Gr A1 tubes in finned tube and U-bend tube configurations in addition to standard straight lengths. Finned tubes with helical or longitudinal fins on the OD are used in air-cooled heat exchangers, economisers, and air preheater units to increase heat transfer surface area. U-bend tubes are supplied for shell-and-tube heat exchanger assemblies. Contact us with your bend radius, fin specification, and quantity for a customised quotation.
SA210 Gr A1 tubes from Solitaire Overseas are available with the following surface treatments as per buyer requirement: bare / mill finish (standard), oil-coated (for corrosion protection during transit and storage), paint-coated (anti-rust primer), hot-dip galvanized (for corrosive environments), and annealed or normalised (heat-treated for controlled mechanical properties). Please specify the required surface treatment at the time of enquiry.
The price of SA210 Gr A1 tubes depends on the outside diameter, wall thickness, length, quantity, surface treatment, and current carbon steel market rates. As of current market conditions, prices in India typically range from ₹80 to ₹140 per kg for standard sizes in stock — subject to market conditions at date of enquiry. Export prices are quoted in USD or EUR FOB Mumbai. For a firm quotation with delivery timelines, please submit your specification using the enquiry form on this page or email us at vishal@solitaire-overseas.com.
Standard sizes of SA210 Gr A1 tubes are maintained in stock at our Mumbai warehouse and can typically be dispatched within 3–7 working days of order confirmation, subject to quantity. For custom sizes, cut-to-length requirements, or IBR-stamped lots, lead time is typically 2–4 weeks. Export shipments are dispatched FOB Mumbai with all documentation including MTC, packing list, and IBR certificates. Contact us with your quantity and destination for a firm delivery commitment.
Each batch of SA210 Gr A1 tubes from Solitaire Overseas undergoes the following quality checks before dispatch: (1) Chemical composition analysis (spectrometer / heat certificate verification); (2) Mechanical property testing — tensile, yield, and elongation; (3) Hardness testing (HRB / HB); (4) Hydrostatic testing at a minimum of 1,000 psi for OD up to 101.6 mm; (5) Dimensional inspection — OD, wall thickness, length, and straightness; (6) Visual and surface inspection; (7) Eddy Current Testing (ECT) per ASTM E426 and Ultrasonic Testing (UT) per ASTM A210 Supplementary Requirement S4 available on request. Full mill test certificates are provided with each shipment.
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IBR & ASTM certified. EN 10204/3.1b MTR. Export packing available. Ships from Mumbai to 50+ countries.