ASTM A778 Tubes Manufacturer
Midland Alloys Inc. is a reliable Indian manufacturer and global supplier of ASTM A778 Tubes, catering to the demands of diverse industries. These tubes are produced through continuous welding and then cold worked to satisfy precise dimensional, and mechanical specifications. Austenitic stainless steel tubes that have been welded, and are classified as ASTM A778 are meant for general corrosion service at low to moderate temperatures. These tubes are available in sizes ranging from 6.35 mm to 101.6 mm OD and in varying wall thicknesses based on application. The standard covers grades like TP304, TP316, TP304L and TP316L. These tubes have outstanding mechanical qualities, such as significant reduction in area, good elongation (usually greater than 35%) and high tensile strength. The chemical composition strictly adheres to ASTM standards, with a focus on preserving a low carbon content to enhance weldability and corrosion resistance.
Key Benefits of ASTM A778 Tubes
ASTM A778 Tubes are widely used due to their performance in general-purpose structural and fluid transport systems. Their versatility, combined with cost efficiency, makes them a preferred option across global sectors.
- Outstanding resistance to oxidizing conditions and corrosion
- A low carbon concentration ensures better corrosion resistance and weldability.
- It act as a cost-effective substitute for seamless tube in light-duty applications
- Perfect for fluid handling, and non-critical pressure service
- Suitable for manufacturing, bending, and cutting operations
- Custom lengths, schedules, and surface treatments are available.
ASTM A778 Tubes Specification
1/2" (15 NB) to 48" (1200NB)
ASTM A213, ASME SA213, ASME SB111, ASME SB135
ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Threaded / Screwed / Forged / Plate
150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Forging, Rolling, Casting
FNPT, NPT, BSPT, MNPT, BSPP
Contact us today to discuss how ASTM A778 Tubes can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
| Element | Weight % |
|---|---|
| Copper | 76.0-79.0 |
| Zinc | Reminder |
| Aluminium | 1.8-2.5 |
| Arsenic | 0.02-0.06 |
| Lead | 0.07 |
| Iron | 0.06 max |
| Physical Properties | Condition | ||
|---|---|---|---|
| T (°C) | Treatment | ||
| Density (×1000 kg/m3) | 8.33 | 25 | |
| Poisson’s Ratio | 0.34 | 25 | |
| Elastic Modulus (GPa) | 117 | 25 | |
| Tensile Strength (Mpa) | 34 | 2 | |
| Yield Strength (Mpa) | 125 | ||
| Elongation (%) | |||
| Reduction in Area (%) | |||
| STANDARD | UNS | WERKSTOFF NR. |
|---|---|---|
| Aluminium Brass | C68700 | 2.0460 / 1785 |
The difference between ASTM A312 and ASTM A778
The primary distinction between ASTM A312, and ASTM A778 is found in their application focus and manufacturing procedures. ASTM A778 covers welded stainless steel tubes that are not necessarily heat-treated after welding unless required by the purchaser. These tubes are suitable for non-critical, general-purpose applications where corrosion resistance is essential but high-pressure or high-temperature service may not be the primary concern. These tubes have been cold worked to ensure their mechanical qualities.
On the other hand, ASTM A312 specifies seamless or welded austenitic stainless steel pipes that are furnished in the heat-treated condition, making them suitable for high-temperature and high pressure environments, including chemical, petrochemical, and refinery services. ASTM A312 tubes are appropriate for essential service as they meet more stringent requirements than A778 in terms of longitudinal weld integrity, hydrostatic testing, and wall thickness tolerance.
Plate
Shear
Press
Inspection
Lathe
Drilling
Cleaning
Flange
Inspection
Analytic
Marking
Packing & Shipping
Applications of ASTM A778 Tubes
ASTM A778 Tubes are used extensively in systems where corrosion resistance is required under low-to-moderate pressure conditions. These include water transportation lines, drainage systems, HVAC piping, and architectural structures. In the food and beverage industry, they are used in fluid handling systems due to their sanitary-grade finish. The chemical and pharmaceutical sectors prefer these tubes for low-aggressive chemical transport and non-critical equipment. In wastewater management, A778 Tubes play a role in sludge transport and structural piping. Pulp and paper mills use these tubes in environments where stainless corrosion resistance is needed but not under high stress. Industries, that manufacture heat exchangers, condensers, and cooling systems also use ASTM A778 Tubes when seamless or high-pressure options are not required.
Why Choose ASTM A778 Tubes from Midland Alloys Inc.
Midland Alloys Inc. is a leading Indian manufacturer and exporter of high-quality ASTM A778 Tubes. As an ISO-certified company, we prioritise precision, quality and compliance, with international standards. We offer complete customisation options including cut-to-length tubes, specific end finishes, varying wall schedules, and multiple surface treatment finishes such as pickled, polished, and passivated. We have strong internal testing protocols such as mill test certifications, and provisions for third-party inspections depending on the customer requests. With a global presence includes the Gulf, Europe, Africa and Southeast Asia, we make sure both bulk and project-specific orders are delivered on time. All tubes are marked according to ASTM/ASME standards and supplied with Mill Test Certificates (MTC) validating mechanical and chemical conformity. Our team ensures complete technical assistance, transparent documentation, and long-term partnerships built on consistency and client satisfaction.
FAQs
ASTM A778 Tube prices depend on tube dimension, material quality (TP304, TP316, etc.), surface quality, and quantity ordered. Export requirements and customization might affect the cost.
ASTM A778 Tubes come in diameters from 6.35 mm to 101.6 mm outer diameter, with custom wall thicknesses to suit your project requirements. Special sizes can be produced on order.
Yes, the tubes are usually used in structural and architectural uses for their corrosion resistivity, ease of workability and attractive finish.
