K720 Steel

K720 Steel

Steel name: K720
Diagram No.: 2256
Mat.No. (Wr.Nr.) designation: 1.2842
EN designation: 90MnCrV8
AISI/SAE designation: ~O2
UNS designation: ~T31502
Chemical composition in weight %: 0.90% C, 0.25% Si, 0.90% Mn, 0.35% Cr, 0.10% V
Steel group: Cold work tool steels
Properties: Tools (punches) and dies for blanking, punching and similar operations; threading and woodworking tools, machine knives for the pulp, paper and metalworking industries; measuring tools and plastic moulding dies.
Applications: Cold forming fine blanking, stamping, blanking standard parts (molds, plates, pins, punches), general components for mechanical engineering.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 790 to 820 °C, 1454 to 1508 °F. Oil, salt bath 392 - 482°F (200 to 250°C) up to 0.787 inch (20 mm) thickness. Holding time after temperature equalization: 15 to 30 minutes.
Tempering: After hardening, tempering to the desired working hardness, see tempering chart.
Diagram note: Hardening temperature: 810C / 1490 F. Specimen size: square 20 mm.

Tempering Diagram

Price: 20.00 US $
Buy Online Tempering Diagram

Other Steel Data links
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Diagrams of Steels
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants

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.