ASTM A178 Tubes: Reliable ERW Boiler & Superheater Tubing
Amardeep Steel is a premier Manufacturer, Supplier, and Exporter of high-quality ASTM A178 Tubes and ASME SA 178 Tubes. This specification covers electric-resistance-welded (ERW) carbon steel and carbon-manganese steel tubes intended for use as boiler tubes, boiler flues, superheater flues, and safe ends. Our A178 Boiler Tubes are engineered for reliable performance, excellent weld integrity, and good formability, making them a trusted choice for various steam-generating and heat transfer applications.
What Are ASTM A178 Tubes?
ASTM A178 Tubes, with its ASME equivalent ASME SA 178 Tubes, define the standards for minimum-wall-thickness, electric-resistance-welded (ERW) tubes made from carbon steel and carbon-manganese steel. These Carbon Steel A178 Tubes are specifically designed for high-pressure applications within boilers, superheaters, and similar heat transfer apparatus.
The manufacturing process involves forming flat-rolled steel strips into a tubular shape and then welding the longitudinal seam using an ASTM A178 Electric Resistance Welded Tubes process. After welding, the tubes are typically heat-treated to relieve stresses and refine the microstructure of the weld zone, ensuring it performs comparably to the base metal. While the term "SA178 Seamless Tubes" might be searched for by users looking for boiler tube solutions, it's important to note that ASTM A178 specifically covers A178 ERW Tubes. These tubes offer a cost-effective and reliable alternative to seamless tubes in many boiler and heat exchanger applications where their pressure and temperature ratings are suitable.
ASTM A178 / ASME SA 178 Tube Specifications
Amardeep Steel supplies ASTM A178 Tubes conforming to rigorous industry standards.
| Specification Attribute | Details for ASTM A178 / ASME SA 178 Tubes |
|---|---|
| Primary Standard | ASTM A178 / A178M; ASME SA178 / SA178M |
| Available Grades | ASTM A178 Grade A Tubes (Low-Carbon Steel)<br>ASTM A178 Grade C Tubes (Medium-Carbon Steel)<br>ASTM A178 Grade D Tubes (Carbon-Manganese Steel) |
| Manufacturing Process | Electric-Resistance-Welded (ERW) |
| Product Description | Minimum-wall-thickness ERW carbon steel and carbon-manganese steel boiler and superheater tubes. |
| Outer Diameter (OD) | Typically 1/2 inch to 5 inches [12.7 mm to 127 mm]. |
| Wall Thickness (WT) | Minimum wall thicknesses from 0.035 inch to 0.360 inch [0.9 mm to 9.1 mm], depending on OD. |
| Length | Standard lengths or custom cut-to-length as required. |
| Heat Treatment | After welding, all tubes are heat treated at a temperature of 900°C [1650°F] or higher and followed by cooling in air or in the cooling chamber of a controlled-atmosphere furnace. Cold-drawn tubes are heat treated after the final cold-draw pass at a temperature of 680°C [1200°F] or higher. |
| Testing & Certification | Flattening test, flare test, flange test, hardness test, tension test, reverse flattening test, hydrostatic or nondestructive electric test. Mill Test Certificate (MTC) to EN 10204 3.1. |
Chemical Composition of ASTM A178 Grades (Typical wt %)
| Element | Grade A (Low-Carbon) | Grade C (Medium-Carbon) | Grade D (Carbon-Manganese) |
|---|---|---|---|
| Carbon (C) | 0.06 - 0.18 | 0.35 max | 0.27 max |
| Manganese (Mn) | 0.27 - 0.63 | 0.80 max | 1.20 - 1.80 |
| Phosphorus (P) | 0.035 max | 0.035 max | 0.035 max |
| Sulfur (S) | 0.035 max | 0.035 max | 0.035 max |
| Silicon (Si) | 0.25 max | -- (Not Specified) | 0.10 - 0.40 |
Mechanical Properties of ASTM A178 Grades
| Property | Grade A | Grade C | Grade D |
|---|---|---|---|
| Tensile Strength, psi [MPa] | 47,000 [325] | 60,000 [415] | 70,000 [485] |
| Yield Strength, psi [MPa] | 26,000 [180] | 37,000 [255] | 40,000 [275] |
| Elongation in 2" (50mm), % (longitudinal, standard round specimen) | 35 | 30 | 30 |
| Hardness (Max, Rockwell B) | 77 HRB | 85 HRB | 89 HRB |
Types of ASME SA 178 Boiler Tubes
Alloy steel pipes and tubes are specialized components made from steel alloyed with elements like chromium and molybdenum, enhancing their strength, corrosion resistance, and high-temperature performance. They are categorized by manufacturing process (seamless or welded) and specific grades like ASTM A335 P-grades for pipes and ASTM A213 T-grades for tubes.
Applications & Industries Served by A178 Boiler Tubes
ASTM A178 Tubes / ASME SA 178 Tubes are specifically designed and widely used for:
- Boiler Tubes: For steam generation in industrial and utility boilers, including water walls and economizer sections. A178 Boiler Tubes are a common choice.
- Boiler Flues: For conveying combustion gases.
- Superheater Flues & Tubes: For increasing steam temperature in superheater sections of boilers (Grades C and D are often preferred for higher strength at temperature).
- Safe Ends: For joining tubes of different materials or thicknesses within a boiler.
- ASTM A178 Heat Exchanger Tubes: In certain types of heat exchangers operating under conditions suitable for carbon steel.
- Air Preheaters: For preheating combustion air using flue gases.
The choice of grade (ASTM A178 Grade A Tubes, ASTM A178 Grade C Tubes, or ASTM A178 Grade D Tubes) depends on the specific design temperature, pressure, and required mechanical strength for the application.
Why Choose Amardeep Steel for Your ASTM A178 Tubes?
Amardeep Steel is your trusted Manufacturer, Supplier, and Exporter of ASTM A178 Tubes in India and for the global market:
- Grade Availability: We offer a comprehensive range including ASTM A178 Grade A Tubes, Grade C Tubes, and Grade D Tubes.
- Quality Manufacturing: Our ASTM A178 Electric Resistance Welded Tubes are produced with advanced ERW technology and precise heat treatment.
- Stringent Quality Control: Adherence to ISO 9001 and rigorous testing ensures every ASME SA 178 Tube meets or exceeds specifications.
- Competitive Pricing: We provide an excellent Price for high-quality SA178 Carbon Steel Tubes, offering great value.
- Global Export Capabilities: Efficient logistics and experience in exporting A178 ERW Tubes worldwide.
- Customization & Technical Support: We offer cut-to-length services and expert technical assistance.
Related Products
Amardeep Steel offers a comprehensive range of carbon steel pipes and tubes for various industrial applications. In addition to our ASTM A178 Tubes, you may also be interested in the following products:
Explore our full inventory of Carbon Steel Pipes & Tubes for all your project needs.
Get Your ASTM A178 Tubes / ASME SA 178 Tubes Price & Consultation
For the latest Price, detailed technical specifications, or to discuss your project requirements for ASTM A178 Tubes or ASME SA 178 Tubes, contact the boiler tube experts at Amardeep Steel Centretoday. We are committed to providing high-quality A178 Boiler Tubes, including ASTM A178 Grade A Tubes, ASTM A178 Grade C Tubes, and ASTM A178 Grade D Tubes, along with tailored solutions for your steam generation and heat transfer applications.