Stainless steel 304 (also known as 18/8 stainless steel due to its 18% chromium and 8% nickel composition) is the most widely used austenitic stainless steel grade in industrial applications worldwide. For Southeast Asian manufacturers and exporters looking to sell on Alibaba.com, understanding the technical specifications of 304 grade is fundamental to meeting global buyer expectations and competing effectively in the B2B marketplace.
The corrosion resistance of 304 stainless steel stems from its chromium content, which forms a passive oxide layer on the surface that protects against oxidation and rust. This makes 304 suitable for a wide range of environments, from food processing equipment to architectural applications. However, it's important to note that 304 has limitations in highly corrosive environments, particularly those containing chlorides (such as seawater or coastal atmospheres).
304 Stainless Steel Mechanical and Physical Properties
| Property | Value | Application Implication |
|---|---|---|
| Tensile Strength | 515 MPa (min) | Suitable for structural components requiring moderate strength |
| Yield Strength | 205 MPa (min) | Good formability for bending and fabrication |
| Elongation | 40% (min) | Excellent ductility for deep drawing operations |
| Hardness (Brinell) | 201 max | Can be work-hardened for increased strength |
| Melting Point | 1400-1450°C | Suitable for high-temperature applications up to 870°C intermittent |
| Density | 8.0 g/cm³ | Standard weight for structural calculations |
For B2B buyers sourcing from Alibaba.com suppliers, these mechanical properties determine whether 304 grade meets their application requirements. The high elongation (40% minimum) makes 304 ideal for deep drawing operations, such as manufacturing sinks, cookware, and automotive components. The moderate tensile strength is sufficient for most structural applications, though higher-strength grades may be needed for load-bearing components in demanding environments.
Grade 304 cannot be hardened by heat treatment and can only be hardened by cold working. Annealing should be carried out at 1010-1120°C followed by rapid cooling for optimum corrosion resistance. For 304L (low carbon variant), the carbon content is limited to 0.03% max to prevent carbide precipitation during welding [5].
