Hastelloy C276 plates in India are procured for fabrication of equipment exposed to severe chemical service, mixed-acid streams, chlorides, wet chlorine, and oxidizing-reducing environments. For engineering, EPC, and maintenance buyers, the material is generally identified as UNS N10276, commonly supplied to ASTM B575 / ASME SB575 for plate, sheet, and strip applications requiring reliable corrosion resistance and weldability.
In Indian industrial supply chains, Hastelloy C276 plate is used where conventional austenitic stainless steels or even duplex grades may not provide adequate resistance to pitting, crevice corrosion, or stress corrosion cracking. Plate selection usually depends on thickness, width, length, heat treatment condition, test certification, and the intended process medium. For fabricated vessels, scrubbers, ducting, tanks, heat exchangers, and lining systems, correct specification review is essential before purchase.
What Is Hastelloy C276 Plate?
Hastelloy C276 plate is a flat-rolled nickel-molybdenum-chromium alloy product with tungsten addition, developed for broad corrosion resistance across a wide range of aggressive media. The alloy is recognized for its ability to perform in both oxidizing and reducing conditions, which is one reason it is frequently selected for chemical processing and pollution-control equipment.
The low carbon content and controlled chemistry help reduce harmful precipitation in the weld heat-affected zone, supporting corrosion resistance after fabrication. In plate form, C276 is preferred where higher section thickness, structural rigidity, and weldable corrosion-resistant construction are required. It is commonly fabricated into pressure parts, transition pieces, shell sections, internals, and support components for corrosive service.
Hastelloy C276 Plate Specifications in India
Industrial procurement teams in India typically purchase Hastelloy C276 plates against internationally recognized material standards. The most common reference is ASTM B575, while ASME SB575 may be required for code-related pressure equipment. Buyers may also request mill test certificates, positive material identification, and traceability details depending on project quality plans.
| Parameter | Details |
|---|---|
| Material Grade | Hastelloy C276 |
| UNS Number | N10276 |
| Werkstoff Number | 2.4819 |
| Product Form | Plate / Sheet / Flat |
| Primary Standard | ASTM B575 / ASME SB575 |
| Typical Thickness Range | 3 mm to 50 mm |
| Typical Width Range | 1000 mm to 2500 mm |
| Typical Length Range | 2000 mm to 6000 mm |
| Supply Condition | Annealed, pickled, hot rolled, cold rolled |
| Documentation | EN 10204 3.1 / Mill Test Certificate |
| Common End Uses | Scrubbers, tanks, vessels, ducting, heat exchangers |
Availability in India can vary by thickness, imported mill origin, and project quantity. For larger requirements, buyers should confirm rolling tolerances, edge condition, plate flatness, and whether the material is ex-stock, cut-to-size, or indent-based.
Chemical Composition and Material Characteristics
Hastelloy C276 is valued because its corrosion performance comes from a balanced nickel-base alloy system rather than a narrow single-medium application. Nickel supports resistance in reducing environments, while chromium improves oxidizing resistance. Molybdenum and tungsten contribute to resistance against localized corrosion such as pitting and crevice attack.
Typical composition is controlled around nickel as the balance, with significant molybdenum and chromium additions, plus tungsten, iron, and very low carbon. This chemistry makes the alloy suitable for severe service involving contaminated acids, chloride-bearing streams, and process upsets where media composition may fluctuate.
- High resistance to pitting and crevice corrosion in chloride-containing environments
- Good resistance to stress corrosion cracking compared with many stainless steels
- Useful in both oxidizing and reducing media, including mixed chemical streams
- Maintains corrosion resistance after welding when properly fabricated
- Suitable for heavy fabrication in plate thicknesses used for tanks and vessels
For design and procurement, actual corrosion allowance and service suitability should still be verified against the process chemistry, temperature, concentration, aeration, and contaminant profile. No alloy should be selected only by generic grade name without reviewing operating conditions.
Applications of Hastelloy C276 Plates in India
Demand for Hastelloy C276 plates in India is closely linked to chemical processing, pharmaceuticals, fertilizers, pollution control, offshore-related systems, and specialty fabrication. The alloy is often selected when service conditions involve chlorides, acidic condensates, bleaching chemicals, or aggressive by-products that may damage lower-alloy materials.
Common fabricated applications include absorber towers, reaction vessels, FGD systems, pickling equipment, pulp and paper bleach plant components, evaporator sections, pressure vessels, and storage tanks for corrosive chemicals. In some projects, C276 plate may also be used as a corrosion-resistant liner or cladding-related fabrication material where full solid alloy construction is required only in wetted areas.
Typical sectors in India include:
- Chemical and petrochemical processing plants
- Pollution-control and flue gas desulfurization systems
- Pharmaceutical and fine chemical equipment
- Pulp and paper process units
- Acid handling, chlorine service, and scrubber fabrication
- Marine-adjacent and coastal process installations
Fabrication, Welding, and Supply Condition
Hastelloy C276 plate is generally supplied in annealed and pickled condition for fabrication. As with other nickel alloys, machining and forming practices differ from carbon steel and should be planned accordingly. Clean tooling, controlled heat input, and proper filler metal selection are important to preserve corrosion performance in the finished equipment.
The alloy is known for good weldability, which is one reason it is widely used in plate fabrication. During welding, contamination from sulfur-bearing compounds, embedded iron, or poor surface preparation should be avoided. Fabricators usually review qualified welding procedures, filler metal compatibility, and post-fabrication cleaning requirements before production.
When ordering plate for fabrication in India, buyers often specify whether the requirement is for full-size plate, cut blanks, plasma-cut parts, or edge-prepared pieces. This can affect yield, lead time, freight, and total project cost. For pressure equipment, code documentation and traceability should be aligned with the approved quality plan.
Buying Checklist for Hastelloy C276 Plates India
Industrial buyers can reduce procurement risk by checking technical and commercial details before release of purchase order. This is particularly important for imported nickel alloys where dimensions, origin, and certification can vary between lots.
- Confirm ASTM B575 / ASME SB575 requirement
- Verify grade as Hastelloy C276 / UNS N10276 / 2.4819
- Check exact thickness, width, length, and tolerance requirement
- Ask for heat number traceability and EN 10204 3.1 certification
- Confirm annealed/pickled or other required supply condition
- Review application medium, temperature, and fabrication method
- Clarify whether material is ex-stock or indent for project timelines
- Request PMI, third-party inspection, or additional testing if specified
These checkpoints are especially relevant for EPC contractors, OEMs, and maintenance shutdown teams working to fixed project schedules. Material verification at the procurement stage helps avoid fabrication delays and non-conformance later in the project cycle.
Why ASTM B575 Matters for Plate Procurement
ASTM B575 is the principal specification referenced for low-carbon nickel alloy plate, sheet, and strip, including Hastelloy C276. It provides a recognized basis for product form, chemistry, mechanical requirements, and supply condition. In practice, this allows buyers, inspectors, and fabricators to work against a common standard rather than relying on informal grade descriptions.
For Indian buyers supplying to refineries, chemical plants, and export projects, the ASTM or ASME reference is often essential for technical approval. It supports documentation review, inspection planning, and consistency across multiple plate lots used in a single fabrication package.
FAQ
What is the standard specification for Hastelloy C276 plates in India?
The most commonly referenced product standard is ASTM B575, with ASME SB575 used where pressure equipment or code compliance is required. Buyers should also confirm UNS N10276, dimensions, supply condition, and certification requirements.
Where are Hastelloy C276 plates used?
They are widely used in chemical processing, scrubbers, tanks, vessels, ducting, heat exchangers, bleach plant equipment, and systems handling chlorides, wet chlorine, mixed acids, and other aggressive media. Plate form is preferred for fabricated equipment requiring both corrosion resistance and structural integrity.
What should buyers verify before ordering Hastelloy C276 plate?
Key checks include ASTM/ASME specification, plate size and tolerance, heat number traceability, mill test certificate, supply condition, origin, and whether additional inspection such as PMI or third-party verification is needed. The intended service environment should also be reviewed to confirm grade suitability.