What is equivalent to AISI 4130 material

AISI 4130 is a widely recognized designation primarily used in North America. However, due to globalization and different international standards organizations, equivalent or very similar materials exist under other naming conventions. Finding an exact equivalent can sometimes be challenging as minor variations in composition ranges or specified properties might exist between standards, but several grades are considered functionally interchangeable for many applications.

Here are some common standards and grades often cited as equivalent standards or close counterparts to AISI 4130:

UNS (Unified Numbering System): G41300 is the UNS designation for AISI 4130. This system provides a unified identification across different standard bodies.
SAE (Society of Automotive Engineers): Often uses the same designation, SAE 4130. AISI and SAE grades are frequently harmonized for this type of steel.
European Standard (EN): The closest common European equivalent is often considered 25CrMo4 (or material number 1.7218 under DIN/EN). While not identical in exact composition ranges, it shares similar characteristics and applications.
British Standard (BS): May be referenced as CDS110 or related specifications depending on the form (e.g., tube). BS specifications like 708A25 or 708M25 can also be comparable.
Japanese Standard (JIS): The corresponding Japanese grade is typically SCM430.
German Standard (DIN): 25CrMo4 (material number 1.7218) is the relevant DIN standard.

It is crucial to note that while these grades are similar, they might have slight differences in minimum/maximum percentages for certain elements or specific mechanical property requirements defined by the respective standard. For critical applications, engineers must carefully review the specific material specifications (like those for AISI 4130 sheet) to ensure the chosen equivalent meets all design requirements. The application, required heat treatment, and regulatory environment often dictate which standard must be formally adhered to.