Material Introduction to Hastelloy B4

HASTELLOY B-4 is a high-temperature alloy that features excellent corrosion resistance and high-temperature oxidation resistance, commonly used in high-temperature corrosive environments in the petroleum, chemical, aerospace, and other industries.

HASTELLOY B-4 is a high-temperature alloy with the following advantages:

1. Excellent Corrosion Resistance: HASTELLOY B-4 exhibits superior corrosion resistance, especially against extreme corrosive media such as hydrochloric acid, sulfuric acid, hydrofluoric acid, and acidic oxides.

2. Excellent High-Temperature Performance: HASTELLOY B-4 has great high-temperature strength and thermal stability, suitable for long-term use in high-temperature environments, and can withstand various high-temperature corrosive media.

3. Excellent Mechanical Properties: HASTELLOY B-4 has outstanding mechanical properties, excellent mechanical strength, low thermal expansion coefficient, and good processability and weldability.

4. Broad Application Range: HASTELLOY B-4 can be used in high-temperature and high-pressure equipment in industries such as chemical, aviation, aerospace, and nuclear.

Chemical composition includes:

• Nickel (Ni): Maximum content of 64%.
• Molybdenum (Mo): Maximum content of 30%.
• Iron (Fe): Maximum content of 3.0%.
• Chromium (Cr): Maximum content of 2.0%.
• Carbon (C): Maximum content of 0.01%.
• Manganese (Mn): Maximum content of 0.70%.

Key features of HASTELLOY B-4 are:

1. Excellent High-Temperature Corrosion Resistance: Outstanding corrosion resistance in high-temperature, high-pressure corrosive environments, able to resist various acids, bases, and salts.
2. Strong Oxidation Resistance: Maintains stable performance for a long time under high temperatures without easy oxidation.
3. Excellent Mechanical Properties: High strength and toughness with good ductility and weldability.
4. Superior Overall Performance: Excellent overall properties, not only high-temperature corrosion and oxidation resistance but also high-temperature strength and excellent low-temperature impact toughness.

HASTELLOY B-4 is primarily used in high-temperature corrosive environments, such as in the petroleum, chemical, and aerospace industries. Common applications include:

1. High-temperature petrochemical equipment: such as pipes, vessels, heaters, heat exchangers, etc.
2. Flue gas desulfurization equipment: such as flue gas desulfurization towers, chimneys, flue gas emission systems, etc.
3. Air preheaters: such as air preheater casings and tube bundles.
4. Nuclear industry: such as nuclear reactors and nuclear fuel carriers.
5. Medical equipment: such as artificial joints, prosthetics, etc.

In summary, HASTELLOY B-4, as an exceptional high-temperature alloy, has a broad application prospect and is an indispensable material in modern industrial production due to its high-temperature corrosion resistance, oxidation resistance, and mechanical properties.