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ASME SA179 (ASTM A179) seamless cold-drawn low-carbon steel tubes are the industry standard for heat exchangers, condensers, and boiler applications requiring reliable heat transfer under moderate pressure. Solitaire Overseas manufactures and exports SA179 carbon steel tubes from Mumbai, India, supplying refineries, power plants, and OEM fabricators across 50+ countries. Our tubes are produced to the latest ASTM A179 / ASME SA179 specification using premium low-carbon steel billets, cold-drawn to tight dimensional tolerances and tested to EN 10204 / 3.1b mill certificate standards.
ASTM A179 (the ASME boiler code equivalent is ASME SA179) is the standard specification for seamless cold-drawn low-carbon steel tubes used in heat exchangers, condensers, and similar heat transfer equipment. Published by ASTM International, the standard covers tubes with outer diameters from 1/8" (3.2 mm) to 3" (76.2 mm) and is referenced alongside ASTM A450/A450M for general carbon steel tube requirements.
The 'SA' prefix (ASME SA179) indicates the tube has been manufactured and tested to satisfy both ASTM and ASME boiler & pressure vessel code Section II requirements, making it acceptable for IBR-regulated applications in India and internationally.
| Element | Symbol | ASTM A179 / ASME SA179 Limit |
|---|---|---|
| Carbon | C | 0.06 – 0.18% |
| Manganese | Mn | 0.27 – 0.63% |
| Phosphorus | P | ≤ 0.035% max |
| Sulfur | S | ≤ 0.035% max |
| Silicon | Si | ≤ 0.25% max |
| Property | ASTM A179 / ASME SA179 Requirement |
|---|---|
| Tensile Strength (min.) | 47 KSI / 325 MPa |
| Yield Strength (min.) | 26 KSI / 180 MPa |
| Elongation in 2" / 50 mm (min.) | 35% |
| Hardness | Not specified by standard — per buyer requirement |
| Parameter | Details |
|---|---|
| Standard | ASTM A179 / ASME SA179 |
| Material | Seamless cold-drawn low-carbon steel |
| Manufacturing process | Cold Drawn (primary), also Cold Rolled, Hot Rolled on request |
| OD Range | 6.35 mm – 63.5 mm (¼" to 2½") |
| Wall Thickness | 0.5 mm – 10 mm |
| Length | 3,000 mm – 16,000 mm (custom lengths available) |
| End Finish | Plain end, Beveled end, Square cut, Burr free, Plastic end caps |
| Surface | Black (self-colour), Varnish/oil coated, Pickled & passivated on request |
| Dimensional standard | ASTM, ASME, and API |
| Companion standard | ASTM A450/A450M (general requirements for carbon & alloy steel tubes) |
For full specification details: Download ASTM A179 Material Specification PDF
We stock and supply SA179 tubes in the following standard OD/WT combinations. Custom sizes available on request:
| OD (mm) | WT (mm) | OD (mm) | WT (mm) | OD (mm) | WT (mm) |
|---|---|---|---|---|---|
| 6.35 | 0.91 | 19.05 | 2.769 | 31.75 | 2.769 |
| 9.53 | 1.22 | 20.00 | 2.00 | 31.75 | 3.70 |
| 12.70 | 1.22 | 25.00 | 2.00 | 38.10 | 2.41 |
| 12.70 | 1.65 | 25.40 | 1.651 | 38.10 | 2.769 |
| 15.875 | 1.245 | 25.40 | 2.108 | 38.10 | 3.05 |
| 15.875 | 1.651 | 25.40 | 2.769 | 38.10 | 3.403 |
| 15.875 | 2.108 | 25.40 | 3.048 | 50.80 | 2.413 |
| 15.875 | 2.413 | 25.40 | 3.40 | 50.80 | 3.404 |
| 16.00 | 1.20 | 25.40 | 2.41 | 57.15 | 3.048 |
| 19.05 | 1.22 | 25.40 | 2.70 | 60.30 | 2.00 |
| 19.05 | 1.651 | 25.40 | 2.76 | 63.50 | 3.76 |
| 19.05 | 2.00 | 25.40 | 3.15 | 63.50 | 8.00 |
Indicative tube weight calculated as: W (kg/m) = 0.02466 × (OD − WT) × WT
| OD (mm) | WT (mm) | Weight (kg/m, approx.) |
|---|---|---|
| 12.70 | 1.65 | 0.46 |
| 19.05 | 2.108 | 0.90 |
| 25.40 | 2.769 | 1.58 |
| 31.75 | 2.769 | 2.03 |
| 38.10 | 3.048 | 2.65 |
| 50.80 | 3.404 | 3.97 |
| 63.50 | 3.76 | 5.57 |
Full weight chart available on request. Contact our technical team for weight calculations for non-standard combinations.
Not sure whether to specify SA179, ASME SA178, or ASME SA210 A1? This table covers the key differences:
| Feature | ASME SA179 | ASME SA178 | ASME SA210 A1 |
|---|---|---|---|
| Standard scope | Heat exchangers & condensers | Electric-resistance welded boiler tubes | Boiler & superheater tubes |
| Manufacturing process | Seamless cold-drawn | ERW (welded) | Seamless hot-finished or cold-drawn |
| Carbon content | 0.06 – 0.18% | ≤ 0.06 – 0.18% | ≤ 0.27% |
| Min. Tensile Strength | 325 MPa | 325 MPa | 415 MPa |
| Min. Yield Strength | 180 MPa | 180 MPa | 255 MPa |
| Typical OD range | Up to 76 mm | Up to 76 mm | Up to 114 mm |
| IBR applicability | Yes | Yes | Yes |
| Best use case | Heat exchangers, condensers | Lower-pressure boiler applications | High-pressure boilers |
Also see: ASTM A192 Carbon Steel Tubes and ASME SA214 Carbon Steel Tubes for related grades.
SA179 tubes manufactured by Solitaire Overseas are produced via the cold-drawing process — the same method specified in ASTM A179. Here's what that means for quality:
Premium low-carbon steel billets are sourced from approved mills. The billet is hot-pierced and hot-rolled to form the "mother tube" — the starting seamless hollow.
The mother tube is acid-pickled to remove mill scale and surface oxides, then lubricated with a drawing compound for smooth die passage.
The tube is drawn through a precision die and internal mandrel at room temperature, reducing OD and WT simultaneously to achieve tight tolerances (OD ±0.1 mm, WT ±10%) and improved surface finish.
Cold-worked tubes are heat treated at controlled temperatures to restore ductility and meet the ≥35% elongation requirement specified in ASTM A179.
Each tube is hydrostatic tested (or NDE), dimensionally inspected, and certified before dispatch. MTR issued per EN 10204/3.1b.
Tell us your OD, WT, quantity, and certification requirements — we'll reply within 24 hours.
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Every SA179 tube supplied by Solitaire Overseas undergoes the following quality controls:
| Test / Certificate | Standard Reference |
|---|---|
| Hydrostatic test (or NDE substitute) | ASTM A179 Sec. 14 |
| Flattening test | ASTM A450 |
| Flaring test | ASTM A450 |
| Hardness test | Vickers / Brinell |
| Tensile & yield strength test | ASTM A370 |
| Chemical analysis / PMI | XRF / Spectrometry |
| Ultrasonic / Eddy current NDE | ASTM E213 / E309 |
| Mill Test Report (MTR) | EN 10204 / 3.1b |
| NABL-approved lab reports | Available on request |
| IBR certification | Indian Boiler Regulations |
Read more: How to ensure the quality of SA179 tubes in your application →
SA179 / ASTM A179 tubes are the preferred choice for heat transfer applications across these industries. Also see our dedicated pages for SA179 Heat Exchanger Tubes and SA179 Boiler Tubes.
ASTM A179 is the material specification published by ASTM International. ASME SA179 is the identical specification adopted by ASME into its Boiler and Pressure Vessel Code (Section II, Part A). Chemical composition and mechanical requirements are identical. The ASME designation is specified when tubes are used in pressure vessels or boilers under ASME BPVC or IBR code jurisdiction in India.
The minimum yield strength of ASME SA179 (ASTM A179) tubes is 26 KSI (180 MPa). The minimum tensile strength is 47 KSI (325 MPa), with a minimum elongation of 35% in 2 inches (50 mm).
Standard SA179 tubes are available in ODs from 6.35 mm (¼") to 63.5 mm (2½"), wall thicknesses from 0.5 mm to 10 mm, and lengths from 3,000 mm to 16,000 mm. Solitaire Overseas also supplies custom sizes and cut-to-length pieces per drawing requirements.
ASTM A179 material contains 0.06% to 0.18% carbon. This low carbon content is intentional; it maximises thermal conductivity, formability, and resistance to hydrogen embrittlement, making the grade ideal for heat exchanger tube fabrication.
Yes. Solitaire Overseas supplies SA179 tubes with IBR (Indian Boiler Regulations) certification. SA179 tubes manufactured to ASME SA179 are acceptable under IBR for boiler pressure parts. IBR test certificates are issued on request.
ASME SA179 tubes are seamless cold-drawn. ASME SA178 tubes are manufactured by electric resistance welding (ERW). SA179 is preferred where weld-free integrity is essential (high-pressure, high-temperature, or cyclic service). SA178 is lower cost and suitable for lower-pressure boiler applications.
SA179 targets heat exchangers and condensers: lower carbon (0.06–0.18%), lower tensile strength (325 MPa), higher elongation. SA210 A1 is for boilers and superheaters: higher carbon (up to 0.27%), higher tensile (415 MPa), higher yield (255 MPa). Choose SA210 A1 for high-pressure boiler applications, SA179 for heat exchange duty.
SA179 tube prices depend on OD, wall thickness, order quantity, certifications required, and current steel market rates. Contact Solitaire Overseas for a current price list or custom quote; we respond within 24 hours and supply competitively from our Mumbai stockyard.
Each SA179 tube undergoes hydrostatic testing (or NDE substitute), hardness test, flattening test, flaring test, tensile and yield strength test, chemical analysis / PMI, and dimensional inspection. Optional tests include ultrasonic testing, eddy current, radiography, and NABL-approved independent lab reports.
Use: W (kg/m) = 0.02466 × (OD − WT) × WT, where OD and WT are in millimetres. Example: a 25.4 mm OD × 2.769 mm WT tube weighs approximately 0.02466 × (25.4 − 2.769) × 2.769 ≈ 1.54 kg/m. A full weight chart is available from our technical team on request.
SA179 tubes are designed for heat exchanger and condenser service, not ultra-high-pressure applications. For high-pressure boiler tubes, ASME SA210 Grade A1 or alloy grades (SA213 T11, T22) are more appropriate. That said, SA179 is routinely used in heat exchangers at 10–100 bar in refinery and power plant service.
For standard stock sizes, typical delivery is 7–14 business days from order confirmation. For non-stock sizes or special certifications (IBR, third-party), allow 3–5 weeks. Export orders are fully documented (fumigation cert, packing list, COO, MTR) within 1–2 weeks of order.
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IBR & ASTM certified. EN 10204/3.1b MTR. Export packing available. Ships from Mumbai to 50+ countries.