AMS 5677 is a popular stainless steel grade widely used in different industries. It is known for its excellent mechanical and physical properties, which make it ideal for various applications requiring high strength and corrosion resistance. In this blog post, we’ll delve deeper into AMS 5677’s composition, physical and mechanical properties, uses, hardness, and heat treatment. This post is for anyone wanting to learn more about the AMS 5677 stainless steel grade.
What is AMS 5677?
AMS 5677 is an alloy of nickel, cobalt, and iron designed for applications requiring high strength at elevated temperatures. It provides excellent oxidation resistance and is often used in aircraft and gas turbine components that operate at temperatures up to 1100°F (593°C).
AMS 5677 Composition
One of the most important aspects of AMS 5677 is its composition. It is an austenitic stainless steel grade that contains chromium, nickel, and molybdenum. Generally, the composition of AMS 5677 is at least 16% chromium, 15% nickel, 2% molybdenum, and less than 0.08% carbon. Adding molybdenum makes the grade highly resistant to localized corrosion, including pitting and crevice corrosion. Moreover, the nickel content adds flexibility and toughness to the material.
AMS 5677 Physical Properties
AMS 5677 has excellent physical properties that make it ideal for various applications. Its density is approximately 7.86 g/cm³, and its melting point ranges from 1380°C to 1425°C. Additionally, it has a high thermal conductivity, which makes it useful in applications that require heat transfer. The specific heat capacity of the material is 0.50 J/g-°C at 20°C. Its thermal expansion coefficient is 16.5 μm/m°C (20°C to 100°C).
AMS 5677 Mechanical Properties
Mechanical properties are among the most important factors when choosing a stainless steel grade. AMS 5677 has high tensile strength, yielding strength, and elongation, making it ideal for various applications. Its ultimate tensile strength is around 655 MPa, and its yield strength is approximately 345 MPa. The elongation of the material is around 48%. AMS 5677 also has an excellent impact strength of around 150J at room temperature.
AMS 5677 Uses
AMS 5677 is used in various applications, including aircraft, aerospace, oil and gas, chemical processing, and marine applications. Its high strength and excellent corrosion resistance make it ideal for these applications. It is also used in medical and dental appliances, surgical instruments, and food processing equipment. The stainless steel grade is also used in power generation and nuclear reactor components.
AMS 5677 Hardness
AMS 5677 has a high hardness that is obtained through cold working techniques. The hardness of the material can range from 25HRC to 50HRC, depending on the cold working method used. The material can be annealed to reduce the hardness to the desired level.
AMS 5677 Heat treatment
Heat treatment is an important step when working with AMS 5677. The material can be heat treated through solution annealing and quenching. Solution annealing is performed at 1020°C to 1100°C, followed by quenching in water or oil. This process ensures that the material attains the desired strength and hardness. A subsequent low-temperature anneal around 650°C or 900°C can be applied to remove undesired intergranular phases in the microstructure.
AMS 5677 is a popular stainless steel grade widely used in various applications due to its excellent mechanical and physical properties. It is austenitic stainless steel that contains chromium, nickel, and molybdenum, making it highly resistant to localized corrosion. AMS 5677 is used in aerospace, oil and gas production, and the chemical industry. Its high strength, excellent corrosion resistance, and good machinability make it a preferred choice for many industries. It is essential to understand its composition, physical and mechanical properties, uses, hardness, and heat treatment when working with this material.
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