Sverker 21 Steel

Sverker 21 Steel

Steel name: Sverker 21
Diagram No.: 2747
Mat.No. (Wr.Nr.) designation: 1.2379
AISI/SAE designation: D2
> Chemical composition in weight %: 1.55% C, 0.30% Si, 0.40% Mn, 11.30% Cr, 0.80% Mo, 0.80% V
Steel group: Cold work tool steels
Properties: Uddeholm Sverker 21 is a tool steel with very good abrasive wear resistance but with rather limited cracking resistance. Being the bulk grade for cold work applications there are many advantages such as well established know-how concerning all types of treatments and tool processing. The risk with the popularity is, however, that the grade by routine is used in applications where the properties profile not is entirely appropriate. In such cases normally there are better alternatives like Uddeholm Sleipner, Uddeholm Caldie or Uddeholm Vanadis 4 Extra.
Applications: The properties profile of Uddeholm Sverker 21 combine to give a steel suitable for the manufacture of medium run tooling for applications where abrasive wear is dominant and the risk of chipping or cracking is not so high, e.g. for blanking and forming of thinner, harder work materials.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Preheating temperature: 650–750°C (1110– 1290°F). Austenitizing temperature: 990–1080°C (1810– 1980°F) but usually 1000–1040°C (1830– 1905°F). Quenching media: Oil (Only very simple geometries. Vacuum (high speed gas). Forced air/gas. Martempering bath or fluidized bed at 180– 500°C (360–930°F), then cooling in air. Note: Temper the tool as soon as its temperature reaches 50–70°C (120–160°F). Uddeholm Sverker 21 hardens through in all standard sizes.
Tempering: Choose the tempering temperature according to the hardness required by reference to the tempering graph. Temper twice with intermediate cooling to room temperature. Lowest tempering temperature 180°C (360°F). Holding time at temperature minimum 2 hours.
Diagram note: No data.

Tempering Diagram

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Disclaimer: The material data is a central depository of information based on global actual tests and calculated software data that is available to the public for a fee. The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.