ThePipingMart Blog Grades AMS 5608 Haynes Alloy – Composition, Properties and Uses

AMS 5608 Haynes Alloy – Composition, Properties and Uses

AMS 5608

People have used metals for centuries in different applications, from tools and weapons to construction and transportation. With technological advancements, there has been an evolution in the selection and usage of metals. One of the popular metal alloys used today is AMS 5608. But what is AMS 5608? This blog post will discuss everything you need to know about AMS 5608, including its composition, properties, uses, and more.

What is AMS 5608?

AMS 5608 (also known as Haynes Alloy 188) is an advanced aerospace-grade stainless steel alloy developed by the American Society for Testing and Materials. This high-strength metal is known for its corrosion resistance, enhanced weldability, and fatigue strength. It’s used in high-temperature applications such as aircraft turbine engines and gas turbines, making it an integral part of modern aerospace engineering.

What Form is AMS 5608 Available at Piping Mart?

  • Haynes 188 Bars

AMS 5608 Composition

AMS 5608 is an austenitic stainless steel alloy that contains nickel, chromium, and molybdenum. Its composition includes 17-19% nickel, 7.5-9.5% chromium, and 2.5-3.5% molybdenum, with small amounts of manganese, silicon, and carbon. This alloy has a low carbon content, making it highly corrosion-resistant in various environments, including marine and acidic conditions.

Element Content (%)
Cobalt, Co ≥ 37
Nickel, Ni 22
Chromium, Cr 22
Tungsten, W 14
Iron, Fe ≤ 3
Manganese, Mn ≤ 1.25
Silicon, Si ≤ 0.50
Carbon, C ≤ 0.15
Lanthanum, La 0.040
Phosphorous, P 0.020
Sulfur, S 0.015

AMS 5608 Physical Properties

AMS 5608 exhibits excellent physical properties, including high flexibility, toughness, and strength. It has a density of 7.87 g/cm³ and a melting point of 1398-1454°C. This alloy is also non-magnetic and has a low thermal expansion coefficient.

Properties Metric Imperial
Density 8.9 g/cm3 0.324 lb/in3
Melting point 1330°C 2425°F

AMS 5608 Mechanical Properties

AMS 5608 has high tensile and yield strength, with 1020-1205 MPa and 690-900 MPa, respectively. It also has a high elongation at break, making it suitable for forming and fabrication processes. The alloy has a hardness of 35 HRC, making it resistant to abrasion and wear.

AMS 5608 Equivalent

  • AMS 5608
  • AMS 5772
  • GE B50A712
  • GE B50TF74
  • GE B50TF74A
  • PWA 1042

AMS 5608 Uses

AMS 5608 bars is commonly used in various applications requiring high corrosion resistance and strength. It is used in the aerospace industry, specifically in manufacturing turbine engine components. It is also used in the chemical and petrochemical industries and in the manufacturing of surgical tools and instruments.

AMS 5608 Hardness

The hardness of AMS 5608 can be further improved through heat treatment. The alloy can be hardened by annealing at 1093-1204°C for 15-30 minutes, followed by air or water quenching. This heat treatment process increases the alloy’s strength and wear resistance.

AMS 5608 Heat treatment

Heat treatment AMS 5608 is a process used to bring out the optimal combination of hardness and corrosion resistance in stainless steel. This heat-treating procedure imparts superior toughness and wears characteristics while maintaining metallurgical integrity. It is often used to improve the strength of components exposed to extremely high temperatures or corrosive environments.


AMS 5608 bar is a commonly used austenitic stainless steel alloy that exhibits excellent resistance to corrosion and strength properties. Its low carbon content and high nickel, chromium, and molybdenum content make it highly versatile and suitable for different applications, from aerospace to surgical tools. Understanding the composition, properties, and uses of AMS 5608 is crucial in selecting the right material for various applications.

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