Stainless Steel Alloy 904L

Description

Type 904L is a high alloy austenitic stainless steel that is known for its corrosion properties. This low-carbon version of Type 904 stainless steel also offers other benefits to users including:

• Non-magnetic
• Stronger corrosion properties than Type 316L and 317L
• Good resistance to sulphuric, phosphoric, and acetic acids
• High resistance to crevice and stress corrosion cracking
• Excellent formability and weldability

Due to all of the benefits of using Type 904L stainless steel, it can be found in a number of applications in a wide variety of critical industries including:

• Cooling equipment for seawater
• Chemical processing of sulphuric, phosphoric, and acetic acids
• Heat exchangers
• Condenser tubes
• Gas washing
• Control and instrumentation
• Oil and gas industry
• Pharmaceutical production
• Wiring in electrostatic precipitators

To be considered Type 904L, stainless steel must have a unique chemical composition that includes the following:

• Fe balance
• Ni 23-28%
• Cr 19-23%
• Mo 4-5%
• Mn 2%
• Cu S 1-2.0%
• Si 0.7%
• S 0.3%
• N 0.1%
• P 0.03%