904L Stainless Steel

904L stainless steel combines molybdenum and copper with iron for tremendously increased resistance to reducing acids like sulphuric acid. It stands up extremely well to chlorides in the environment for low pitting and crevice corrosion, as well as stress corrosion cracking.

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We can process this steel to fit your applications using our in house processing capabilities and service on your timeline.

Grade 904L stainless steel is one of many stainless steel grades that can be purchased at Tampa Bay Steel.

The "L" in 904L stands for Low Carbon, specifically, that carbon added to the alloy represents .03 percent or less. This means that 904L has very good welding properties. It is also an austenitic alloy, which means that a nonmagnetic solid solution of ferric carbide or carbon in iron is used to increase corrosion resistance.

Who Makes 904L Stainless Steel?

When it comes to the production of 904L stainless steel, several companies stand out in the industry. Manufacturers such as Outokumpu, Acerinox, and Sandvik have been recognized for their high-quality 904L stainless steel products. Additionally, Continental Steel offers a comprehensive inventory of 904L stainless steel that meets various manufacturing specifications including ASTM, EN, and more. Their products are used in critical applications across different industries, which underscores the reliability and performance of their 904L steel.

Properties and Uses of 904L Stainless Steel

904L cannot be hardened by heat treatment. You can weld 904L stainless using any standard method, but it is susceptible to hot cracking. It can be machined but does not machine well.

Common applications take advantage of 904L's corrosion resistance. These include acid processing plants, pulp and paper operations, equipment for cooling seawater, oil refining, and environmental equipment.

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The chemical processing industry makes extensive use of 904L stainless steel due to its broad corrosion resistance. Among 904L stainless steel suppliers, Tampa Bay Steel has the largest 904L plate inventory in Florida.

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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 an 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 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, a 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%

All of the Type 904L stainless steel that Continental Steel supplies; meets typical manufacturing specification including ASTM, EN, and more.

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