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Die Cast & Forging Steels DH31-EX High strength, tough and high heat check resistance hot work die steel.  DH31-EX is a hot working die steel with the best balance of strength and toughness showing the comparable softening resistance to SKD7. DH31-EX NADCA Certification Features: High hardenability High toughness is obtained even in large size die.  High strength High softening resistance  at elevated temperature contributes to high wear resistance.  High toughness DH31-EX has higher toughness than that of SKD61. High heat check resistance Excellent heat check resistance leads to longer life.  Applications: Aluminum die cast dies especially for large size - long life use Aluminum die cast parts such as pins and plunger sleeve Hot forging dies Hot pressing dies Aluminum extrusion dies Examples of Applications: www.daido.co.jp  IMPORTANT NOTE Please be advised that Daido Steel shall not be held responsible for damage caused by misunderstanding or improper use of the technical information contained in this Web site. The contents of this Web site may be subject to change without notice. Please inquire of related department for the latest information. No portion of this Web site may be reproduced without express permission of Daido steel.

DH31-EX Overview Chemical Composition Concept of Development Hardenability Characteristics Surface Hardening Properties Machinability Repair Welding Conditions Physical Properties Testimonials