When it comes to selecting the right stainless steel pipe for your project, choosing between 904L and 310S can be a tough decision.

Both materials have unique properties and advantages, but it is important to understand the differences between them to make a well-informed choice.

904L Stainless Steel Pipe

904L stainless steel is an austenitic stainless steel with a low carbon content.

Highlighted Features

• Excellent Corrosion Resistance:904L offers outstanding resistance to sulfuric acid, phosphoric acid, and chloride-induced corrosion.
• High Nickel and Molybdenum Content: Enhances its ability to resist pitting and crevice corrosion. 
• Good Weldability and Formability: Can be easily welded using standard techniques. 
• Non-Magnetic Properties: Remains non-magnetic even after processing. 
• Durability in Harsh Environments: Resistant to stress corrosion cracking and oxidation. 

Applications

• Chemical Processing: Handling strong acids and aggressive chemicals.
• Marine and Seawater Equipment: Ideal for desalination plants and shipbuilding.
• Pharmaceutical and Food Industry: Used in hygienic environments.
• Heat Exchangers and Condensers: Particularly in highly corrosive conditions. 

310S Stainless Steel Pipe

310S stainless steel is another popular choice for high-temperature applications.

Highlighted Features

• Outstanding Heat Resistance: Can withstand temperatures up to 1150°C (2100°F) without significant oxidation. 
• Good Corrosion Resistance: Performs well in mildly corrosive environments. 
• High Strength and Durability: Retains its mechanical properties at elevated temperatures. 
• Good Weldability: Can be welded using standard stainless steel techniques. 
• Resistance to Thermal Fatigue: Ideal for continuous high-temperature exposure. 

Applications

• Furnace Components and Kilns: Resistant to oxidation at extreme temperatures. 
• Power Plants and Heat Exchangers: Performs well in thermal cycling conditions. 
• Petrochemical and Refineries: Used in heat-intensive processing  .
• Exhaust Systems and Boilers: Ensures long-term durability in high-temperature exhaust gases.

Cost Comparison

• 904L stainless steel is significantly more expensive due to its high nickel, molybdenum, and copper content.
• 310S stainless steel is more affordable since it doesn’t contain molybdenum or copper, making it a cost-effective option for high-temperature applications.

Which One Should You Choose? 

Requirement	Best Choice
Corrosion resistance (acids, chlorides)	904L
High-temperature applications (above 1000°C)	310S
Seawater and marine exposure	904L
Oxidation resistance in high heat	310S
Budget-friendly solution	310S
Chemical processing & industrial applications	904L

Conclusion

• Choose 904L if you need superior corrosion resistance in acidic and chloride-rich environments.
• Choose 310S if you need exceptional high-temperature resistance and oxidation protection.

By understanding the differences between 904L and 310S, you can choose the best material based on your specific needs. If you need any customization or professional assistance, please contact us, and we will provide expert advice!