304/304H stainless steel is an austenitic chromium-nickel alloy that is among the most adaptable and widely used materials in the 300 series of stainless steels.
Known for its excellent corrosion resistance, formability, and durability, 304/304H is a preferred choice in a variety of demanding industrial environments. What sets 304H apart from its 304 counterpart is the higher carbon content, which enhances the alloy's tensile and yield strength, making it particularly suitable for high-stress applications.
The higher carbon content in 304H stainless steel, compared to standard 304, provides increased strength at elevated temperatures. This makes 304H ideal for applications that require both durability and resistance to oxidation under heat. Despite the enhanced strength, 304/304H retains the excellent corrosion resistance characteristic of stainless steels, making it suitable for use in environments where exposure to moisture and corrosive substances is a concern.
Due to its versatility and strength, 304/304H stainless steel is used in a wide range of industrial applications. Below are some of the most common uses of this alloy:
304/304H stainless steel is widely used in condensers, where its resistance to corrosion and ability to withstand high temperatures make it a reliable choice. Condensers, which are used to convert vapor into liquid, often operate under conditions that require materials with excellent heat and corrosion resistance. 304/304H meets these demands, ensuring long-term performance.
In heat exchangers, 304/304H stainless steel is utilized for its ability to endure the stresses of thermal cycling and high-temperature operations. The alloy’s resistance to oxidation and scaling under high temperatures is crucial in maintaining the efficiency and lifespan of heat exchangers, which are critical components in industrial processes such as power generation and chemical manufacturing.
The oil refining industry demands materials that can withstand harsh environments, including exposure to chemicals and high temperatures. 304/304H stainless steel is used in various components of oil refining equipment due to its high strength, durability, and resistance to corrosion. Whether in pipelines, distillation columns, or other refinery equipment, 304/304H ensures reliable performance.
In the power generation sector, 304/304H stainless steel is often employed in components that are exposed to high temperatures and corrosive environments. The alloy's enhanced tensile and yield strength make it suitable for use in turbines, boilers, and other equipment where strength and heat resistance are paramount.
The chemical industry frequently utilizes 304/304H stainless steel in applications that involve the handling of corrosive substances. The alloy’s resistance to a wide range of chemicals, along with its strength and durability, makes it ideal for use in reactors, storage tanks, and piping systems within chemical processing plants.
304/304H stainless steel is a versatile and high-strength alloy that finds application across multiple industries. Its combination of excellent corrosion resistance, enhanced strength due to higher carbon content, and adaptability to high-temperature environments make it an ideal material for critical industrial components. From condensers and heat exchangers to oil refining and chemical processing, 304/304H stainless steel delivers reliable performance and longevity in demanding conditions. Whether for new installations or as part of maintenance and upgrades, 304/304H remains a trusted choice for engineers and manufacturers worldwide.
| Element | Composition (%) |
| Carbon (C) | 0.04 - 0.10 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 18.00 - 20.00 |
| Nickel (Ni) | 8.00 - 10.50 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa (75 ksi) |
| Yield Strength (0.2% Proof) | ≥ 205 MPa (30 ksi) |
| Elongation | ≥ 40% |
| Hardness (Brinell) | ≤ 201 HB |
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