CarTech No. 879 Steel

CarTech No. 879 Steel

Steel name: CarTech No. 879
Diagram No.: 2294
UNS designation: T20819
AISI/SAE designation: H19
Chemical composition in weight %: 0.40% C, 0.30% Si, 0.30% Mn, 4.25% Cr, 0.45% Mo, 2.10% V, 4.25% W
Steel group: Hot work tool steels
Properties: CarTech No. 879 is a hot work tool and die steel known for its exceptional resistance to shock and abrasion at high temperatures. This steel exhibits good toughness as well as excellent resistance both to heat checking and softening at high temperatures.
Applications: CarTech No. 879 should be considered for applications in hot extrusion dummy blocks for copper or brass, permanent molds for brass casting, hot forging die inserts, hot work dies, hot press dies for both steel and brass, hot punch tools, valve extrusion die rings and inserts, forging dies, and hot extrusion die inserts for steel.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: Preheat slowly and uniformly to 1500/1550°F (816/843°C). Then heat more rapidly to an austenitizing temperature of 2000/2200°F (1093/1204°C). The lower end of the temperature range is only used when a relatively low final hardness is desired. Hold for 2-5 minutes at temperature and harden by cooling in air or oil. A controlled atmosphere or vacuum furnace should be used to minimize decarburization and oxidation.
Tempering: As soon as the hardened steel reaches 125/150°F (52/66°C), temper to the hardness desired as suggested in the chart on the following page. Double tempering is recommended to improve toughness and reduce heat cracking. Time at temperature should be no less than one and a half hours or one hour per inch of section.
Diagram note: No data

Mechanical Properties - Tempering Temperature

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.