Hastelloy S is a nickel-based corrosion-resistant alloy that has a high resistance to both oxidizing and reducing environments. It was developed by ANTON METAL, a world-renowned manufacturer of nickel alloys that are used in a variety of applications in the chemical processing, aerospace, marine, and power industries. In this article, we will discuss the chemical composition, mechanical properties, standards, and applications of Hastelloy S.
Chemical Composition
Hastelloy S is composed of a combination of nickel, molybdenum, chromium, tungsten, cobalt, iron, and other elements. The chemical composition of this alloy is shown in Table 1.
Table 1: Chemical composition of Hastelloy S
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 58.0 – 65.2 |
| Molybdenum (Mo) | 15.0 – 17.0 |
| Chromium (Cr) | 14.0 – 16.0 |
| Tungsten (W) | 3.0 – 4.5 |
| Cobalt (Co) | 2.5 – 3.5 |
| Iron (Fe) | 1.0 max |
| Carbon (C) | 0.025 max |
| Manganese (Mn) | 0.50 max |
| Silicon (Si) | 0.50 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
Mechanical Properties
The mechanical properties of Hastelloy S are shown in Table 2.
Table 2: Mechanical properties of Hastelloy S
| Property | Value |
|---|---|
| Density | 8.22 g/cm³ |
| Melting Point | 1330°C (2426°F) |
| Tensile Strength | 760 MPa (110,000 psi) |
| Yield Strength | 415 MPa (60,200 psi) |
| Elongation | 40% |
| Hardness | HRB 80 |
Hastelloy S has a high corrosion resistance in both oxidizing and reducing environments. It is resistant to chloride-induced stress corrosion cracking and can withstand high temperatures without losing its mechanical properties. Hastelloy S also has excellent resistance to sulfuric acid, phosphoric acid, and nitric acid.
Standards
Hastelloy S conforms to various international standards, including ASTM B622 for seamless nickel-chromium-molybdenum alloy pipes and tubes, ASTM B619 for welded nickel-chromium-molybdenum alloy pipes and tubes, and ASTM B366 for nickel alloy fittings. In addition, it meets the requirements of NACE MR0175/ISO 15156-3, which specifies the use of materials for sour service in oil and gas production.
Applications
Hastelloy S is used in a variety of applications that require high corrosion resistance and high-temperature strength. Some typical applications include:
- Chemical Processing: Hastelloy S is widely used in the chemical processing industry, especially in the production of phosphoric acid, sulfuric acid, and other highly corrosive chemicals.
- Aerospace: Hastelloy S is used in aircraft engine components that are exposed to high temperatures and corrosive environments.
- Marine: Hastelloy S is used in marine applications, such as seawater desalination plants, due to its excellent resistance to saltwater corrosion.
- Power Generation: Hastelloy S is used in power generation applications, such as gas turbines and boilers, due to its high-temperature strength and corrosion resistance.
Conclusion
Hastelloy S is a nickel-based corrosion-resistant alloy that offers high-temperature strength and excellent resistance to both oxidizing and reducing environments. It is widely used in the chemical processing, aerospace, marine, and power industries due to its unique combination of properties. ANTON METAL is a leading manufacturer of Hastelloy S and other nickel alloys that are used in a variety of applications. As such, Hastelloy S is an excellent option for demanding environments where corrosion resistance and high-temperature strength are critical.
Post time: May-27-2023
