24 April, 2025

A frequent technical question we address from workshops and engineers concerns the classification of AISI 4140 steel: does it belong in the tool steel category? Based on standard industry classifications, AISI 4140 is not typically grouped with traditional tool steels, such as the W, O, A, D, S, H, M, T, L, F, or P […]

When selecting materials for demanding applications, understanding the mechanical properties is critical. For engineers working with structural components and machinery, tensile strength is a key metric. Let’s take a straightforward look at AISI 4140 steel, a popular choice we supply here at Aobo Steel, and specifically its tensile strength. What is 4140 Steel? First, AISI

A common question we encounter is about steel designations, specifically regarding A2 and Type 304 stainless steel. It’s essential to be clear, as different global standards can sometimes lead to confusion. To put it directly: Yes, Type 304 stainless steel is often referred to as “A2” under the ISO 3506 standard. If you see “A2”