ASTM A789 Seamless Welded Tubes are high performance ferritic-austenitic (duplex and super duplex) stainless steel tubes, which are used in the construction environment in which the primary factors determining the applications are high mechanical strength, high corrosion resistance, and resistance to stress corrosion cracking. The producers such as Shubham metals in Bangalore, India play an important role in the production and supply of the ASTM A789 tubes to the industries that are operating in an aggressive environment such as the chemical processing industries, offshore oil and gas industries, desalination plants, heat exchangers as well as units operating power generation plants.
The production of ASTM A789 seamless and welded tubes is done under strict ASTM and ASME requirements whereby chemical composition, dimensional variations and uniform metallurgical properties are controlled. These tubes are notably built to outplay the traditional austenitic stainless steel tubing in the chloride-laden and high-pressurized conditions and are therefore a favorable alternative to extended industrial service.
Shubham Metals is an ASTM A789 Seamless & Welded Tube Manufacturer in Bangalore, India , offering a large variety of duplex and super duplex grades, sizes and finishes to meet the demands of local and global projects.
ASTM A789 Seamless & Welded Tube Suppliers in Bangalore, India
Bangalore, India has become a credible sourcing destination of duplex stainless steel tubing and Shubham Metals is a brand name amongst the ASTM A789 Seamless & Welded Tube Suppliers in Bangalore, India . We assist industrial buyers with quality that remains constant, price that remains competitive and timely delivery schedule.
Reasons why B2B Buyers will pre-select us as a Supplier:
- Frequent supply of duplex and super duplex grades.
- Discounted prices on large and project orders.
- Technical assistance in choice of materials.
- Steady logistics and covering supply all over the country.
Understanding ASTM A789 Seamless & Welded Tubes
ASTM A789 is a standard specification, which embraces seamless and welded ferritic/austenite stainless steel tubing, which is meant to serve in general corrosion-resistant services. ASTM A789 tubing is characterized by the characteristic duplex microstructure that is usually ferrite-austenite (50/50) giving it an unmatched strength and corrosion protection.
In contrast to conventional standards of stainless steel tubing, ASTM A789 is usually chosen where:
- When there is a need to have higher yield strength.
- It is essential to fight against chloride stress corrosion cracking.
- There are anticipated longevity of service and low maintenance.
From a B2B procurement perspective, ASTM A789 tubing can be considered as a compromise in terms of performance, reliability, and acceptance of the global specifications, and therefore, it is applicable to EPC projects, OEM manufacturing, and export-oriented applications.
Common Duplex & Super Duplex Grades Covered Under ASTM A789
ASTM A789 tubing comes in several duplex and super duplex stainless steel allotropies depending on the service and exposure to corrosion.
|
UNS Designation |
Common Name |
Key Characteristics |
|
S31803 / S32205 |
Duplex 2205 |
High strength, good pitting and crevice corrosion resistance |
|
S32750 |
Super Duplex 2507 |
Excellent resistance to chloride corrosion and high pressure |
|
S32760 |
Super Duplex Zeron 100 |
Enhanced PREN value for marine and offshore use |
|
S32304 |
Lean Duplex |
Cost-effective option with moderate corrosion resistance |
For industrial purchaser, the choice of grade has a direct effect on equipment life, risk of downtime and cost of lifecycle. Shubham Metals assists customers in making technical assistance on the selection of appropriate ASTM A789 grade, depending on the pressure, heat, and corrosive media.
ASTM A789 Seamless & Welded Tube Dealers in Bangalore, India
To have fast and localized service provision, Shubham Metals collaborates with a known network of ASTM A789 Seamless & Welded Tube Dealers in Bangalore, India in the key industrial areas.
These dealers are very critical to helping:
- Requirements on maintenance shutdown.
- Urgent orders and short-lead-time.
- Medium to small quantity procurement.
The main strengths of our dealer network are:
- Standard stock of standard sizes and grades.
- More rapid responsiveness on urgent needs.
- Authenticity and traceability of material used.
- Repeat supply and flexible order quantities.
Manufacturing Process: Seamless vs Welded ASTM A789 Tubes
ASTM A789 tubes are available in seamless and welded variations depending on the need by industries.
1. Seamless ASTM A789 Tubes
The hot extrusion and then cold drawing of solid duplex stainless steel billets are used to manufacture seamless tubes. Lack of weld seam guarantees a uniform strength and high performance at high pressure and variable temperatures.
These tubes are preferred in:
- High-pressure heat exchangers.
- Applications in the offshore and subsea.
- Critical chemical processing lines.
2. Welded ASTM A789 Tubes
Welded tubes Welded tubes are made by rolling strip or plate of duplex stainless steel into tubular form and welding the longitudinal seam with controlled welding methods. Heat treatment (post-weld), and cold working are done in order to obtain the desired mechanical and corrosive characteristics.
Welded tubes find application in:
- Greater diameter applications
- Lowsystems and structuralsystems
- Sensitive projects in which costs are met to the performance requirements
Smooth and welded tubes that are properly manufactured and tested are the same when it comes to meeting ASTM A789 requirement.
ASTM A789 Tube Dimensions & Technical Specifications
ASTM A789 Seamless and Welded Tubes are come in a large variety of size and configuration to suit a wide range of industrial requirements.
|
Parameter |
Specification |
|
Standard |
ASTM A789 / ASME SA789 |
|
Tube Type |
Seamless & Welded |
|
Outer Diameter |
Small precision sizes to large industrial diameters |
|
Wall Thickness |
Light to heavy wall as per application |
|
Length |
Random, fixed, or cut-to-length |
|
End Finish |
Plain end, beveled end |
|
Surface Finish |
Mill finish, pickled, bright annealed, polished |
Bespoke dimensions, smaller tolerances and project needs could be provided on request.
ASTM A789 Seamless & Welded Tube Exporters in Bangalore, India
Shubham Metals is also known as a trusted ASTM A789 Seamless Welded Tube Exporter in Bangalore, India , that distributes duplex stainless steel tubing to international markets where quality and compliance is a requirement.
Export buyers benefit from:
- Close compliance with the ASTM and ASME standards.
- Consistency in terms of repeated export orders.
- The packaging that is export-worthy to avoid destruction during transit.
- Full documentation comprising of MTCs and inspectors reports.
- Third party inspection and certification support.
We can export and hence provide reliable business partners to foreign EPC contractors and OEMs.
Mechanical Properties & Performance Advantages
ASTM A789 duplex and super duplex tubing have much greater mechanical strength than austenitic stainless steel tubing, and a designer can safely use smaller wall sections.
Key performance advantages include:
- Very good resistance to pitting, crevice and stress corrosion cracking.
- Large yield and tensile strength.
- Internal flow is made smooth and smooth.
- Fabrication properties and good weldability.
- Coupled with long life of service and less maintenance.
In the case of B2B buyers, these benefits are reflected in the form of decreased operational risk, decrease in material usage and cost effectiveness in the long run.
Industrial Applications of ASTM A789 Seamless & Welded Tubes
ASTM A789 tubing is a very popular product in industries where corrosion resistance and material integrity is a very important issue.
Common applications include:
- Heat exchangers and condensers.
- Petrochemical and chemical plants.
- Offshore and onshore oil & gas facilities.
- Desalination and water treatment installations.
- Pulp & paper industries
- Refineries and power generation plant.
ASTM A789 tubing is flexible, and therefore can be used in new and replacement projects.
Quality Control, Testing & Certification
The important issue of industrial buyers who purchase ASTM A789 tubing is the aspect of quality assurance. Every tube provided according to this standard is highly inspected and tested.
Typical testing includes:
- Technical analysis Chemical composition analysis
- Mechanical testing of properties.
- Dimensional and visual examination.
- Non-destructive or hydrostatic electric testing.
Shubham Metals supplies product which are compile with Mill Test Certificates (MTCs) and other inspection documentation, which has complete traceability and compliance.
Why Choose Shubham Metals for ASTM A789 Tubes?
B2B buyers has to choose the appropriate manufacturer in the same way that they choose the appropriate material. Shubham Metals integrates the technical application, quality-concentrated production, and customer-oriented service to provide the ASTM A789 seamless and welded tubes, which are subject to ardent project demands.
We concentrate on long-term relationships that are based on transparency, reliability and constant performance of products.
Request a Quote for ASTM A789 Seamless & Welded Tubes
In case you are intending to purchase ASTM A789 Seamless & Welded Tubes to meet your industrial or project, Shubham Metals is willing to help. Today, we can talk to you about specifications, prices and delivery schedules that can fit your requirements.
Technical Specifications
| ASTM A789 Seamless & Welded Tube – Technical Specifications | |
|---|---|
| Specification | ASTM A789 |
| Covered Grades | S31803, S32205, S32750, S32760 |
| Size Range (OD) | 1/8" to 24" (3 mm to 600 mm) |
| Wall Thickness | 0.5 mm to 20 mm (16 SWG to 4 BWG) |
| Length | Single Random, Double Random, Cut to Size, Coil Length |
| Form | Seamless / Welded / ERW / EFW |
| End Finish | Plain, Bevelled, Square Cut |
| Specifications | ASTM A213 / A269 / A789 / B338 / B622 / B163 |
| Surface Finish | Bright Annealed, Pickled, Polished, Mirror |
| Testing | Hydrostatic, Eddy Current, U-Bend, Flare, Flattening, IGC |
| Certification | EN 10204 3.1 / 3.2 Mill Test Certificate |
