Steel Equivalents

Increasing international trade, global sourcing, manufacturing and engineering, have led to an increased need for a clearer understanding of different international steel specifications.

Due to the fact that standards are not equivalent and interchangeable, for example European, US and Japanese standards, deciding which metals are equivalent requires careful consideration of multiple factors.

The main factors for estimating equivalency include chemical composition, manufacturing method, finishing method, product shape, mechanical and physical properties. Additional factors such as deoxidation method, hardenability, corrosion and heat resistance and other properties may also have significant influence on steel equivalency and potential interchangeability.

Steel equivalents from around the world are usually grouped on the basis of chemical composition and, to some extent, mechanical properties. Cross-reference tables of equivalent steels often come from the recommendations of standards development organizations (SDOs); recommendations from SDOs are the primary source for cross-reference tables of equivalent steels in Total Materia as well.

However, even when coming from SDO recommendations, equivalent steels may not have precisely the same chemistry or precisely the same tensile and yield strength and physical properties, which means that they are not absolutely equivalent and need careful consideration as to whether it can be substituted one-for-one.

It is important to recognize that a judgment on the equivalency of two steels is a very delicate and possibly error-prone process, highly dependent on circumstances in each particular case, such as heat treatment, state of delivery, service conditions etc. Also, as you see from above, the number of possible criteria for comparison and the associated combinations are very high. Consequently, defining steel equivalents requires a careful study of the specifications by qualified professionals. Most of the specifications are complex documents that cannot be condensed into a few lines of text.

With these constraints in mind, it is clear that the search and evaluation of cross-reference equivalency for a given material is enhanced by having as much relevant data readily available in a searchable and relational database. The Total Materia database provides the most comprehensive set of tools, algorithms and raw data to support the search process.

The Total Materia approach for presenting cross-reference and material equivalency candidates can be viewed as a continuum of categories that moves from the straight forward “Identical” to the more ambiguous but often insightful “Smart Cross”. Review the sidebar to learn more about the methodology for identifying and displaying cross-reference results.

The Total Materia database brings global metal properties together into one integrated and searchable database. Quick and easy access to the mechanical properties, chemical composition, cross-reference tables, and more provide users with an unprecedented wealth of information. Click the button below to test drive the Total Materia database.

How Total Materia Helps You to Find Equivalent Metals?

To provide even better and more precise cross-referencing of steel alloys from all over the world, Total Materia now provides categorization of equivalents and similarity. This unique feature allows you to view more candidates for steel equivalents while also providing information about the degree of their similarity and a first indication of the reliability of the original information source:

  • All - Displays all potential equivalents together
  • Identical - Materials explicitly defined as identical by SDOs (Usually indicates a name change/replacement)
  • Official – Steel equivalents provided directly by the SDOs from within their standards
  • Composition – Alloys which have 100% identical chemical composition
  • Implicit – Steel equivalents defined in a transitional form (If A = B, and B = C, then A = C where B is the transitional equivalent)
  • Other – Steel cross-references from producers’ catalogs, books, brochures, analysis published on the Internet etc.
  • SmartCross - Total Materia proprietary cross-referencing tool, based on fuzzy sets and metallurgical expertise.

Click on images to enlarge.


Example of all equivalences


Example of Identique equivalences


Example of Official equivalences

Composition 100%

Example of materials with identical composition


Example if Implicit equivalences

Other Sources

Example if Other Sources equivalences


Example of SmartCross equivalences