Super Alloys
Hastelloy C-276
Widely regarded as the most versatile corrosion-resistant alloy in existence, Hastelloy C-276 provides an impenetrable barrier against aggressive chlorides, solvents, and sour gas.
High-performance corrosion-resistant alloy engineered for aggressive and mixed chemical environments.
Ideal for harsh chemical media including strong oxidizers, chlorides, and reducing acids. Trusted across pulp, paper, power, and process industries.
Ingot Manufacturing Process
RFQ from Customer
Alloy chemistry and ingot specifications are finalized as per application requirements.
Alloy Design/Planning
As per customer requirement mould design carried out and planned for charge preparation, charge sequences in VIM furnace. Careful selection of raw materials are the prime factor to achieve specified chemistry of an alloy.
Alloy Melting by VIM
Virgin elements are charged into the VIM furnace either in air or under vacuum, with precise adjustments made for trace element additions during melting.
Process & Quality Control
The melt is poured under vacuum into precision-engineered molds using an automatic tilting mechanism for defect-free solidification.
Primary Finishing
Post-casting processes include surface treatment, cropping, and preparation of ingots for downstream processing.
Testing & Packaging
Every batch is tested for chemical composition by Spark- OES / wet analysis / Gas analysis, and physical compliance as per customer specification before secure packaging.
Technical Specifications
Standard: UNS N10276
| Element | Min (Wt%) | Max (Wt%) |
|---|---|---|
| Carbon | 0.00 | 0.008 |
| Silicon | 0.00 | 0.06 |
| Manganese | 0.00 | 0.75 |
| Phosphorous | 0.00 | 0.020 |
| Sulphur | 0.00 | 0.008 |
| Chromium | 15.00 | 16.50 |
| Molybdenum | 15.00 | 17.00 |
| Tungsten | 3.50 | 4.50 |
| Vanadium | 0.00 | 0.30 |
| Cobalt | 0.00 | 2.00 |
| Nickel | Balance | - |
Gaseous Impurities
| Element | Composition (PPM) |
|---|---|
| O | <25 |
| N | <50 |
| H | <3 |
Properties
Excellent resistance to both oxidizing and reducing agents, chlorides, wet chlorine gas, and sulfuric environments—ideal for welds and complex assemblies.
| Alloy | Mechanical properties* | PML alloy: as cast* | After Heat Treatment |
|---|---|---|---|
| PML Hastelloy C-276 | |||
| Rockwell Hardness (HRB) | 160 - 240 | - | |
| Ultimate Tensile Strength (UTS) | 495 MPa | 790 MPa | |
| Yield Strength (YS) | 275 | 415 MPa | |
| Elongation Break | - | 62% | |
| Reduction of Area | - | - |
*Typical values- Mechanical properties of superalloy varies as per the heat treatment cycle.
The Unrivaled Champion of Chemical Resilience
Widely regarded as the most versatile corrosion-resistant material in existence, Hastelloy C-276 provides an impenetrable barrier against aggressive chlorides, solvents, and sour gas in the world's most volatile industrial environments.
Process Capability
| Input: Batch Size | Output | Alloying Elements | Chemistry Tolerance | Impurities Max |
|---|---|---|---|---|
| 25 kg to 80 kg | Ingot of required shape | Cr, Mo, W, Fe | ±0.5% for high-level (2-digit) elements ±0.3% for low-level (1-digit) elements | Oxygen < 50 ppm Hydrogen < 10 ppm Nitrogen < 100 ppm All others < 50 ppm |
Applications
PML-manufactured C-276 ingots are ideal for
1
Digesters and bleach plants (paper industry)
2
Sour gas applications
3
Flue gas desulfurization units
4
Heat exchangers and evaporators in sulfuric acid service
5
Reactors, condensers, filters, and mixers in chemical plants
6
Organic chloride processing and acid catalyst systems
Trust, Reliability & Quality
With over six decades of expertise, PML delivers high-performance component technologies and precision solutions trusted across critical industries.
ISO 45001
Occupational Health and Safety (OH&S) management systems
ISO 14001
Environmental Management Systems (EMS)
ISO 9001
Quality Management Systems (QMS)
IATF 16949
International Standard for Automotive Management Systems
AS 9100
Aerospace Quality Management System (QMS)
Frequently Asked Questions
It's used in extreme chemical environments, including sour gas, sulfuric acid systems, chlorides, bleach plants, and acid catalyst equipment.
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