Steel Grades

Classification of various steel grades by their composition and properties has been developed over many years by a number of standards development organizations (SDOs) such as European EN, US ASTM and AISI steel grades, Japanese JIS, Chinese GB, International ISO etc.

Generally, all metals can be classified into groups such as ferrous, non-ferrous and alloys:

  • Chemical composition, such as carbon, low-alloy or stainless steel grades
  • Manufacturing methods, such as open hearth, basic oxygen process, or electric furnace methods
  • Finishing process, such as steel grades for hot rolled or cold rolled products
  • Product form, for example bar plate, sheet, strip, tubing or structural shape
  • Deoxidation practice, such as killed, semi-killed, capped or rimmed steel grades
  • Microstructure, such as ferritic, pearlitic and martensitic steel grades
  • Required strength level, for example steel grade A240 Grade C specified in ASTM standards has the tensile stress value between 515 and 655 MPa
  • Heat treatment performed, such as annealing, quenching and tempering, and thermomechanical processing.
Based on carbon content, steel grades are often divided into three main groups:

  • low carbon steel grades, such as AISI1005 to AISI 1026, IF, HSLA, TRIP, and TWIP steels,
  • middle carbon steel grades, for example AISI 1029 to AISI 1053, and
  • high carbon steel grades, such as AISI1055 to AISI1095.
On the other hand, according to European classification, steel grades are divided into the following groups:

  • non alloy steel grades, such as EN DC01-DC06; S235; S275, etc.,
  • alloy steel grades, like 2CrMo4 and 25CrMo4,
  • stainless steel grades,
  • tool steel grades, for example EN 1.1545; AISI/SAE W110; EN 1.2436, AISI/SAE D6,
  • steel grades for sheet and strip, and
  • steel grades for electrical sheet and strip, like EN 1.0890 and EN 1.0803.

Sometimes a particular grade may have different properties as defined by various standards. For example, steel grade 34CrMo4 is specified by both DIN and EN. Within EN there are 6 different specifications (sub-groups) while the DIN standard reports 10 different specifications. These steel specifications report a variation for tensile properties up to three fold due to the various thermo-mechanical treatments.

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.

Steel Grades in Total Materia

The Total Materia database includes more than 350,000 steel grades from all over the world. chemical compositions, mechanical and physical properties, cross-references and more are only a click away.

Finding a steel grade in the database is very easy and takes seconds. For example, let’s look into the properties of steel grade X 4 CrNi 18 12 according to Euronorm (EN).

Simply use Quick Search at the Subscribers Home page enter the designation and select EN from the standard list.

Steel grades: Search for the Euronorm steel grade X 4 CrNi 18 12

After clicking on the material, a list of subgroups appears. In Total Materia, the term “subgroups” refers to specifications that define properties of the steel grade; in this case the specification EN 10088-2 is selected. Note that properties defined according to different specifications may differ significantly.

Steel grades: List of specifications that define properties of the steel grade X 4 CrNi 18 12

Composition, cross-references and properties of the steel grade X 4 CrNi 18 12 can then be reviewed by clicking appropriate links. See examples below.

Steel grades: Chemical composition of the steel grade X 4 CrNi 18 12
Steel grades: Cross-reference table of the steel grade X 4 CrNi 18 12
Steel grades: Mechanical properties of the steel grade X 4 CrNi 18 12
Steel grades: Physical properties of the steel grade X 4 CrNi 18 12
Steel grades: Properties of the steel grade X 4 CrNi 18 12 on elevated temperatures