Hastelloy vs SS316 – What’s the Difference

You must make a well-informed decision when selecting materials for industrial applications such as chemical processing, oil and gas, and aerospace. Two materials commonly used in these industries are Hastelloy and SS316. They both have unique properties that make them suitable for specific applications. This blog post will explore the differences between these two alloys and break down their strengths and weaknesses.

What is Hastelloy?

Hastelloy is a superalloy made of nickel, chromium, and molybdenum. It has superior corrosion resistance and strength at elevated temperatures due to its high nickel, chromium, and molybdenum content. It is resistant to various oxidation forms and strong acids like hydrochloric acid. Due to its heat tolerance capabilities, it is widely used in the chemical industry for applications exposed to corrosive media.

What is SS316?

SS316 is an austenitic chromium-nickel stainless steel alloy containing molybdenum. It offers higher corrosion resistance than other stainless steel alloys, making it ideal for harsh environments and applications exposed to chlorides or acids. It has a minimum of 10% chromium content, which provides excellent corrosion resistance and durability.

Visit jyotimetal for more information.

Difference Between Hastelloy and SS316


Hastelloy is a nickel-based alloy that contains a high percentage of molybdenum. It also includes chromium, iron, tungsten, and cobalt. Adding molybdenum gives Hastelloy superior corrosion resistance, making it an excellent choice for highly corrosive environments.

On the other hand, SS316 is stainless steel that contains a minimum of 10.5% chromium. It also contains nickel, molybdenum, and a small amount of carbon and manganese. The high amount of chromium in SS316 gives it excellent corrosion resistance, especially in a wide range of alkaline environments.

Strength and Durability

Hastelloy has excellent mechanical strength and is highly resistant to fatigue and stress corrosion cracking. It also has good resistance to pitting and crevice corrosion. These properties make it ideal for harsh chemical environments and applications requiring strength and durability.

SS316 is also known for its strength and durability, making it a popular choice for many applications. It has good weldability and is highly resistant to high-temperature and high-stress environments. However, compared to Hastelloy, SS316 has lower corrosion resistance.


The cost of Hastelloy is generally higher than that of SS316. This is because of its unique properties and complex composition, making manufacturing more difficult. Hastelloy is also more challenging to machine, which can increase its cost further.

SS316, on the other hand, is a relatively affordable material readily available in the market. Its simple composition and ease of manufacturing make it a cost-effective option for many applications.


Hastelloy and SS316 have unique properties and features that make them suitable for specific applications. Hastelloy is commonly used in chemical processing, aerospace, and oil and gas industries due to its superior resistance to corrosion and high-temperature environments.

SS316, on the other hand, is used in applications that require high strength, durability, and excellent resistance to high-temperature and high-stress environments. It is commonly used in food and beverage, petrochemicals, and pharmaceuticals.


In conclusion, Hastelloy and SS316 are two materials with unique properties and features. Hastelloy has excellent corrosion resistance and is suitable for harsh chemical environments, while SS316 is highly resistant to high-temperature and high-stress environments. When selecting materials for your industrial applications, consider each alloy’s specific properties and applications carefully. Understanding the differences between these two materials is crucial in making a well-informed decision that meets your application requirements.



Recent Posts