ASTM A178 Tubes | SA178 Boiler Tubes | ASME SA178 Carbon Steel Tubes Manufacturer & Exporter in India
When industries need tubes that can safely handle high temperature, pressure, and continuous heat, they rely on ASTM A178 Tubes. These tubes are widely used in boilers, superheaters, and heat exchangers across power plants, refineries, and many process industries.
We manufacture and supply ASTM A178 / ASME SA178 Carbon Steel Tubes that are built for long service life, stable performance, and safe operation in demanding conditions. From SA178 Boiler Tubes and A178 Boiler Tubes to SA178 Grade A Seamless Tubes, SA178 Grade C Tubes, and SA178 Grade D Superheater Tubes, our range covers almost every industrial requirement.
As an experienced ASTM A178 Gr A Manufacturer in India and Carbon Steel A178 Pipe Exporter, we focus on delivering tubes that perform reliably in real working conditions—not just on paper, but inside actual boilers and heat systems.
What Are ASTM A178 Tubes?
ASTM A178 Tubes are electric-resistance-welded (ERW) and cold drawn carbon steel tubes specially designed for boilers, superheaters, and heat exchangers. The specification ASTM A178 (also known as ASME SA178) covers tubes meant for moderate to high-temperature service where strength, safety, and durability are critical.
In simple words, these tubes are used wherever:
- Heat is very high
- Pressure is high
- The system runs continuously for long hours
- Safety and reliability are extremely important
That is why SA178 Boiler Tubes and ASTM SA178 Welded Steel Boiler Tubes are commonly found in power plants, thermal stations, chemical plants, and refineries.
Key Features of ASTM A178 / ASME SA178 Carbon Steel Tubes
- High resistance to heat and pressure
- Strong and durable carbon steel construction
- Uniform wall thickness and reliable weld quality
- Good heat transfer efficiency
- Long service life in continuous operation
- Easy to fabricate and install
- Cost-effective compared to many alloy steel options
Types and Grades of SA178 Boiler Tubes
Different applications need different grades. Based on pressure, temperature, and service conditions, the standard offers multiple options:
SA178 Grade A Seamless Tubes
- Lower carbon content
- Good ductility and easy fabrication
- Commonly used in low to medium pressure boilers and heat exchangers
- Very popular because of its balance between strength and formability
SA178 Grade C Tubes
- Higher carbon and manganese compared to Grade A
- Higher strength and better performance at elevated temperatures
- Used in more demanding boiler and heat exchanger applications
SA178 Grade D Superheater Tubes
- Designed for superheater zones and high-temperature service
- Better resistance to long-term heat exposure
- Suitable where the temperature is continuously very high
ASTM A178 ERW Steel Tube
- Made using Electric Resistance Welding (ERW)
- Uniform wall thickness and consistent quality
- Widely used for ASTM SA178 Welded Steel Boiler Tubes and general boiler tubing
Cold Drawn ASTM A178 Tubes
- Further processed after welding
- Better dimensional accuracy and smoother surface
- Preferred for critical heat exchanger and boiler applications
ASTM A178 and ASME SA178
You will often see both names used:
- ASTM A178 – The material standard issued by ASTM
- ASME SA178 – The same standard adopted by ASME for pressure equipment
In practice, ASTM A178 and ASME SA178 Boiler Tubes refer to the same material and same technical requirements. Both are accepted in boilers, pressure vessels, and heat exchanger systems all over the world.
Product Specifications: ASTM A178 / ASME SA178 Boiler Tubes
| Parameter | Details |
| Standard | ASTM A178 / ASME SA178 |
| Product Type | ERW & Cold Drawn Carbon Steel Tubes |
| Grades | Grade A, Grade C, Grade D |
| Manufacturing Process | Electric Resistance Welded (ERW), Cold Drawn |
| Heat Treatment | Normalized / Stress Relieved |
| Ends | Plain End, Beveled End, Cut End |
| Surface Finish | Black, Pickled, Oiled, or as specified |
| Testing | Hydrostatic, Eddy Current / UT, Flattening, Flaring, Dimensional & Visual Inspection |
| Applications | Boilers, Superheaters, Heat Exchangers, Economizers, Pressure Systems |
This specification applies to:
- ASTM SA178 Welded Steel Boiler Tubes
- SA178 Boiler Tubes
- ASTM A178 ERW Steel Tube
- Cold Drawn ASTM A178 Tubes
Chemical Composition of ASTM A178 / ASME SA178 Carbon Steel Tubes
The chemical composition of SA178 material steel is carefully controlled to achieve the right balance of strength, ductility, and heat resistance.
| Grade | Carbon (C) % | Manganese (Mn) % | Phosphorus (P) % (max) | Sulfur (S) % (max) |
| SA178 Grade A | 0.06 – 0.18 | 0.27 – 0.63 | 0.035 | 0.035 |
| SA178 Grade C | ≤ 0.35 | 0.29 – 1.06 | 0.035 | 0.035 |
| SA178 Grade D | ≤ 0.27 | 1.00 – 1.50 | 0.030 | 0.015 |
This composition is one of the main reasons ASTM A178 / ASME SA178 Carbon Steel Tubes perform so well in boiler and superheater environments.
Mechanical Properties of ASTM A178 Tubes
Mechanical strength is critical in boilers and heat systems. Below are the typical mechanical properties of SA178 Boiler Tubes:
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| SA178 Grade A | Min 325 | Min 180 | Min 35 |
| SA178 Grade C | Min 485 | Min 275 | Min 30 |
| SA178 Grade D | Min 415 | Min 240 | Min 30 |
In simple terms:
- Grade A is easier to form and weld
- Grade C offers higher strength for tougher conditions
- Grade D is better for continuous high-temperature zones like superheaters
Size Range and Dimensional Chart of ASTM A178 Tubes
| Outside Diameter (OD) | Wall Thickness (WT) | Length |
| 12.7 mm to 114.3 mm | 1.2 mm to 12.7 mm | Up to 12 meters |
| ½” to 4½” (NPS) | SCH 10, SCH 20, SCH 40, SCH 80 & custom | Fixed or Random Length |
| Custom Sizes | As per customer requirement | As per project requirement |
Available Forms:
- SA178 Grade A Seamless Tubes
- SA178 Welded Tubes
- ASTM A178 ERW Steel Tubes
- Cold Drawn ASTM A178 Tubes
Manufacturing Process: How ASTM A178 Tubes Are Made
From our experience in supplying SA178 Boiler Tubes to various industries, quality depends heavily on the manufacturing process:
- Raw Material Selection
High-quality carbon steel is selected as per SA178 material steel requirements. - ERW Forming and Welding
The steel strip is formed into a tube shape and welded using electric resistance. This creates a strong and clean longitudinal weld. - Cold Drawing (If Required)
For Cold Drawn ASTM A178 Tubes, the welded tube is drawn through dies to improve:- Dimensional accuracy
- Surface finish
- Mechanical properties
- Dimensional accuracy
- Heat Treatment
Tubes are normalized or stress relieved to improve strength, toughness, and reliability in high-temperature service. - Testing and Inspection
Each tube is tested to ensure it meets ASTM A178 / ASME SA178 requirements before delivery.
Applications of A178 Boiler Tubes
Based on real industrial usage, ASTM A178 Tubes are commonly used in:
- Power plants and thermal power stations
- Industrial and package boilers
- Superheaters and economizers
- Heat exchangers and condensers
- Refineries and petrochemical plants
- Fertilizer and chemical processing units
- Sugar, paper, and textile industries
- Pressure vessels and heating systems
Wherever heat and pressure are part of daily operation, SA178 Boiler Tubes are usually part of the system.
Why Customers Choose Us as their ASTM A178 / ASME SA178 Carbon Steel Tube Suppliers?
Customers work with us because:
- We understand boiler and heat exchanger applications from real project experience
- We supply tested and certified ASTM A178 / ASME SA178 Carbon Steel Tubes
- We maintain consistent quality across supplies
- We help select the right grade for the actual working conditions
- We offer reliable delivery schedules and competitive pricing
ASTM A178 Tubes and ASME SA178 Carbon Steel Tubes have proven their reliability in boilers, superheaters, and heat exchangers for many years. With strong mechanical properties, controlled chemical composition, and dependable performance under heat and pressure, SA178 Boiler Tubes remain a smart and trusted choice for critical thermal systems.
Whether you need SA178 Grade A Seamless Tubes, SA178 Grade C Tubes, SA178 Grade D Superheater Tubes, ASTM A178 ERW Steel Tube, or Cold Drawn ASTM A178 Tubes, we are ready to support your project with the right product, the right quality, and the right technical guidance.
ASTM A178 Gr A Manufacturer in India and Global Supplier
Being an ASTM A178 Gr A Manufacturer in India, we serve both domestic and international markets. Our SA178 Boiler Tubes are used in projects across the Middle East, Europe, Southeast Asia, Africa, and South America.
The Carbon Steel A178 pipe price depends on grade, size, thickness, quantity, and raw material market conditions, but we always aim to offer the best balance between quality and cost.
Global Reach
ASC LLP boasts a robust global presence, committed to delivering unparalleled service and quality to clients around the world. Our dedication to prompt delivery and exceptional customer care sets us apart in the industry. Major corporations across the USA, Europe, Asia, and other regions place their trust in our high-quality A178 Carbon Tubes. This widespread trust underscores our reputation for reliability and excellence. By consistently meeting and exceeding the expectations of our international clientele, we continue to solidify our position as a leader in the global steel market.
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.
