Hastelloy corrosion-resistant alloy

Hastelloy is a tungsten-containing nickel-chromium-molybdenum alloy with extremely low silicon and carbon content. As a globally recognized high-performance universal corrosion-resistant material, Hastelloy exhibits excellent stability in strong oxidizing and reducing media, and can effectively resist pitting corrosion, crevice corrosion and stress corrosion cracking.

Our Hastelloy products are widely used in chemical, petroleum, nuclear industry, pharmaceutical and environmentally friendly desulfurization systems. With advanced production technology, we ensure that every batch of Hastelloy meets international quality standards, providing solid material guarantee for your critical applications.

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Hastelloy C-4

Hastelloy C-4 is an austenitic low carbon nickel-molybdenum-chromium alloy that exhibits excellent thermal stability over a temperature range of 650°C to 1040°C. This composition provides extremely high resistance to intergranular corrosion, ensuring reliable operation in a variety of aggressive environments. Under standardized production processes, this alloy can effectively prevent knife edge corrosion and sensitive corrosion in the welding heat affected zone.

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Nickel-Chromium-Molybdenum Alloy

Hastelloy C-4

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✓ ISO 9001 Quality
✓ COC & Test Certificates
✓ Established in 2002
✓ OEM & Custom Sizes

Hastelloy C-4 is an austenitic, low-carbon nickel-molybdenum-chromium alloy that exhibits excellent stability at temperatures ranging from 650°C to 1040°C. This composition enhances its resistance to intergranular corrosion, ensuring superior performance in harsh environments. Under appropriate manufacturing conditions, it can effectively prevent blade line corrosion sensitivity and weld heat-affected zone corrosion.

Applications
  • Flue gas desulfurization systems
  • Pickling and acid regeneration plants
  • Acetic acid and agricultural chemicals production
  • Titanium dioxide production (chlorination process)
  • Electrolytic plating

Specifications
  • Plate/Sheet Plate/Sheet
    Thickness: 0.5mm-60mm
    Width: 500mm-2500mm
    Length: 1000mm-6000mm

  • Rod Rod
    Diameter: 6mm-400mm
    Length: 1000mm-6000mm

  • Tube Tube
    Outer Diameter: 6mm-273mm
    Wall Thickness: 0.5mm-20mm
    Length: ≤ 12000mm

  • Wire Wire
    Diameter: 0.1mm-10mm
    Delivery Forms: Coiled wire or straight wire

Chemical Composition
Min.Max.
Nickel (Ni)RestRest
Chromium (Cr)1418
Molybdenum (Mo)1417
Iron (Fe)3
Cobalt (Co)2
Carbon (C)0.015
Manganese (Mn)1
Silicon (Si)0.08
Phosphorus (P)0.04
Sulfur (S)0.03
Titanium (Ti)0.7
Physical & Mechanical Properties
Grades Density (g/cm³) Melting Point (°C)
C-48.641350-1380°C
Supply Capability
ItemDetails
Lead TimeSamples 5-10 days; production 15-30 days
MOQSmall trial orders accepted
SamplesAvailable on request
PackagingExport-standard coil spools / wooden cases
CertificateCOC with chemical composition analysis
PaymentT/T, L/C
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Frequently Asked Questions (FAQ)

What is the thermal stability interval of Hastelloy C-4? Why is it valued?

C-4 is an austenitic low carbon nickel-molybdenum-chromium alloy with excellent thermal stability from 650°C to 1040°C. Under standardized production processes, it can effectively prevent knife edge corrosion and sensitized corrosion in the welding heat-affected zone. It has extremely high resistance to intergranular corrosion and is suitable for equipment that still needs to maintain corrosion resistance after welding.

C-4 is an austenitic low carbon nickel-molybdenum-chromium alloy with excellent thermal stability from 650°C to 1040°C. Under standardized production processes, it can effectively prevent knife edge corrosion and sensitized corrosion in the welding heat-affected zone. It has extremely high resistance to intergranular corrosion and is suitable for equipment that still needs to maintain corrosion resistance after welding.

C-4 is an austenitic low carbon nickel-molybdenum-chromium alloy with excellent thermal stability from 650°C to 1040°C. Under standardized production processes, it can effectively prevent knife edge corrosion and sensitized corrosion in the welding heat-affected zone. It has extremely high resistance to intergranular corrosion and is suitable for equipment that still needs to maintain corrosion resistance after welding.

Knife edge corrosion and heat-affected zone sensitized corrosion refer to corrosion forms that result in reduced corrosion resistance due to local structural changes after welding or thermal processing. C-4 uses low-carbon austenitic nickel-molybdenum-chromium composition with a titanium content of ≤0.7%. The page indicates that it has excellent thermal stability in the range of 650-1040°C. It can effectively prevent these two types of corrosion with standard processes.

C-4 has a density of 8.64g/cm³ and a melting point of 1350-1380℃; C-276 has a density of 8.9g/cm³ and a melting point of 1325-1370℃. C-4 is lighter, and the melting point range has moved upward as a whole, which is consistent with its composition design that does not contain tungsten and has a low upper limit of iron content.

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