AISI 304 and 304L (SS304L) are austenitic stainless steels, and also known as 18/8 stainless steel. This article will introduce the differences between 304 and 304L stainless steel (304 vs 304L) from chemical composition, mechanical properties, corrosion resistance and weldability.

2024年9月11日 · 304: Slightly harder and more prone to work hardening compared to 304L, which can affect machining speed and tool wear. 304L: Easier to machine than 304, with less work hardening, making it more suitable for complex machining operations.

In grade 304 stainless steel, the maximum carbon content is set at 0.08%, whereas grade 304L stainless steel has a maximum carbon content of 0.03%. This is why the “L” in 304L can be interpreted as meaning extra-low carbon.

2020年1月11日 · Here, we explain the difference between two common types found on the market — 304 and 304L. Type 304 is the most widely used austenitic stainless steel. It is also known as "18/8" stainless steel because of its composition, which includes 18% chromium and 8% nickel.

2025年2月21日 · 304 stainless steel has an ultimate tensile strength of about 620 MPa (90 ksi) and a yield strength of around 289 MPa (42 ksi). 304L stainless steel, on the other hand, has a slightly lower tensile strength of approximately 586 MPa (85 …

2025年2月28日 · In AISI 304 and 304L, the primary difference is the carbon level: 304 has a maximum of 0.08%, while 304L is limited to 0.03%. Lower carbon in 304L enhances weldability by reducing carbide precipitation during welding, which helps prevent intergranular corrosion.

2024年8月9日 · In reality, 304, 304L, and 304H are all variants of austenitic stainless steel, sharing a base composition of approximately 18% chromium (Cr) and 8% nickel (Ni). The primary distinction among these grades lies in their carbon content, which significantly influences their properties and applications.

2025年1月31日 · The primary difference between 304 and 304L stainless steel lies in their carbon content. 304 contains up to 0.08% carbon, while 304L has a maximum of 0.03%, making 304L more resistant to carbide precipitation during welding.

304 vs. 304L — The Basics. The primary difference when comparing 304 vs. 304L stainless steel lies in the carbon content. 304L stainless steel has a lower carbon content than 304, which enhances its weldability and reduces the risk of carbide precipitation during welding.

2023年9月7日 · A: The main difference between 304 and 304L stainless steel is the carbon content. 304 stainless steel has a maximum carbon content of 0.08%, while 304L stainless steel has a maximum carbon content of 0.03%.