Hastelloy C-4 Thermal Stability Alloy, contact us to get free quote and sample!
Hastelloy C4, designated as UNS N06455, stands as an exceptional corrosion-resistant nickel-chromium-molybdenum alloy within the Hastelloy family. 2.4610 Hastelloy C4 is a nickel-chromium-molybdenum alloy which has improved thermal stability. In this alloy C4, the tungsten was totally omitted and the iron content was reduced to approximately 1%. The alloy N06455 also contains approximately 0.3% Ti. Alloy C4 UNS N06455 has excellent resistance to stress-corrosion cracking and to oxidizing atmospheres up to 1040 °C (1900 °F).
Hastelloy C4 UNS N06455 Corrosion Resistance
The chemical composition of Hastelloy C-4 includes nickel, chromium, molybdenum, and a small addition of iron. This unique combination imparts remarkable corrosion resistance, particularly in reducing environments where other materials may falter. The 2.4610 alloy c4 resistance extends to a variety of acids, including hydrochloric, sulfuric, acetic, and phosphoric acids.
The general corrosion resistance of Alloy C276 and Alloy C4 was essentially the same in many corrosive environments, except that in strongly reducing media like hydrochloric acid, Alloy C276 was better; but in highly oxidizing media, the opposite was true, that is, Alloy C4 was better.
Hastelloy Alloy C4 Specifications
- Hastelloy C4 Bar: ASTM B574
- Hastelloy C4 Forgings: ASTM B336
- Hastelloy C4 Welded Tube: ASTM B619/626
- Hastelloy C4 Seamless Tube: ASTM B622
- Hastelloy C4 Sheet/Plate: ASTM B575
Nickel Alloy C4 Application
Flue Gas Desulfurization (FGD): Scrubber towers, dampers, and reheaters exposed to aggressive sulfuric and hydrochloric vapors.
Pharmaceutical & Fine Chemical Production: Agitators, reactors, and high-purity distillation columns handling volatile organic solvents and acids.
Pesticide & Agrochemical Manufacturing: Specialized processing loops involving strong chloride compounds and high thermal loads.
Sour Gas & Petrochemical Refining: Heat exchangers and downhole pipeline components handling highly corrosive sour gas environments.
Nickel C4 Chemical Composition
| Grade | Ni% | Cr% | Mo% | Fe% | C% | Mn% | Si% | Co% | Ti% | S% | P% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Hastelloy C4 | Bal. | 14.5-17.5 | 14.0-17.0 | Max 3.0 | Max 0.009 | Max 1.0 | Max 0.05 | Max 2.0 | Max 0.7 | Max 0.01 | Max 0.025 |
Hastelloy C4 Mechanical Properties
- Solution Annealed
- Tensile: Min 690 MPa
- Yiled: Min 283 MPa
- Elongation: Min 40%
- Density:8.89g/cm3
- Melting Point: 1260°C-1355°C
Supply Capabilities & Processing Options at HT PIPE
We support complete project procurement schedules by manufacturing and testing high-performance alloys to international parameters:
Piping & Tubing: Seamless and welded pipes matching ASTM B619 / B622 specifications in custom schedules.
Industrial Plates & Sheets: Precision cut to ASTM B575 standards, available with custom processing services (plasma or water-jet cutting).
Round Bars & Forgings: Solid bars conforming to ASTM B574, optimized for valve stems, pump components, and shafts.
Pipeline Fittings & Flanges: Butt-weld elbows, reducers, and forged flanges machined precisely to ASME B16.5 standards.
Our company is a professional and reliable one-stop service manufacturer, supplier and exporter. We not only provide Hastelloy C4, but also alloy C22, C276, C2000, B2, Hastelloy B3 pipe, tube, plate, sheet, round bar. Free samples are available. Please contact us for a free quote.
