Stainless steel is known for its exceptional corrosion resistance, strength, and versatility, making it a popular choice across various industries. Due to the availability of a number of grades, it becomes quite difficult to decide which grade is more appropriate for a given application. One such grade that should be of interest is Stainless Steel 310H. In this blog, we will discuss 310H, its types, and how it is different from other stainless steel grades.
Understanding Stainless Steel 310H
310H Stainless Steel is a high carbon version of Grade 310 which is one of the most widely used stainless steel. The letter ‘H’ in its name means ‘high carbon’ and this improves the mechanical characteristics especially at raised temperatures. This grade is an austenitic stainless steel with enhanced ability to resist oxidation and corrosion, in particular at high temperatures. Because of the chemical nature, 310H SS is widely used where high-temperature applications are involved, for instance, furnace components, heat treatment equipment, and power generation.
Key Features of 310H Stainless Steel :
- High Carbon Content: Carbon is increased in 310H compared to 310 and it enhances the strength and the creep characteristics at high temperature.
- Oxidation Resistance: 310H has also high oxidation resistance which allows it to be used in applications that involve constant heat up to 1100°C.
- Corrosion Resistance: While its corrosion resistance is lower than grades like 316, but 310H is suitable for use where there is restricted exposure to sulfuric gasses or reducing conditions.
- Weldability and Formability: 310H retains its weldability and formability as other austenitic stainless steels however it is less ductile due to its higher carbon content.
Variants of SS 310H: 310 and 310S
To better understand how 310H differs from its counterparts, let’s take a closer look at its variants – 310 SS and Stainless Steel 310S.
- Stainless Steel 310: 310 stainless steel is very close to 310H but with the carbon content slightly lower than 310H, usually it is below 0.08%. This lower carbon content provides 310 better corrosion resistance in lower-temperature conditions but its performance is slightly lower in high temperature than that of 310H. It also has very good oxidation stability and finds use in applications such as kiln linings, food processing equipment, and combustion chambers.
- Stainless Steel 310S: 310S is a stabilized version of grade 310, which has a carbon content of not more than 0.03%. It is particularly intended for improving weldability and avoiding formation of carbides during welding, which may cause intergranular corrosion. 310S is widely used in welded structures where corrosion resistance is important even at the expense of high temperature strength. It is used in chemical processing, petroleum refining and in structures that are built for use in extremely low temperatures.
Comparing 310H, 310, and 310S
The key difference between these grades lies in their carbon content, which affects their performance at elevated temperatures and their resistance to corrosion:
- 310H is recommended for high temperature service because of its features such as improved strength and creep resistance.
- 310 has a high resistance to high temperatures and also good corrosion resistance making it good for general heat applications.
- 310S is used where welding is required as the lower carbon content reduces the tendency for carbide precipitation and intergranular corrosion.
Applications of Stainless Steel 310H
Due to its superior high-temperature properties, stainless steel 310H is used in various industries that operate in extreme conditions:
- Furnace Parts and Kilns: Due to its ability to withstand oxidation it is best suited for use in parts that are exposed to heat consistently.
- Heat Treatment Equipment: SS 310H is used in tools and equipment where toughness and heat stability are important.
- Power Generation: 310H Stainless Steel is used in power plants that need high strength materials to withstand the heat and pressure exerted on them.
Conclusion
Stainless Steel 310H, 310, and 310S are suitable for those projects demanding high heat resistance, strength, and corrosion resistance. This way, industries understand the difference between the grades of the material in order to decide which one will be most suitable for their use. Whether the application requires furnace parts that can withstand high temperatures or welded structures meant to be used in corrosive environments, the right stainless steel grade is ideal for long term use.
