AISI D2 Steel

AISI D2 Steel

Steel name: AISI D2
Table No.: 1721
AISI/SAE designation: AISI D2
Chemical composition in weight %: 1.40-1.60% C, max. 0.60% Si, max. 0.60% Mn, max. 0.030% P, max. 0.030% S, 11.00-13.50% Cr, 0.70-1.20% Mo, 0.80-1.10% V, max. 1.00% Co
Steel group: Cold work tool steels
Properties: No data
Applications: Use D-2 for applications requiring long runs and close tolerances. Use it for tools and dies for blanking, punching, forming, cold-extruding, and other operations requiring high compressive strength and excellent wear resistance.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: When heating for hardening, protect the steel by packing or wrapping in some inert materials. When available, the use of well regulated salt bath or controlled-atmosphere furnace, or a vacuum furnace is preferred. Preheat to 1200°F and hold at this temperature until thoroughly soaked. Heat to 1850 °F and hold at this temperature for one hour for each inch of greatest cross section. The pieces may then be removed and cooled in still air to a temperature of 150° and tempered immediately. Oil quenching is required on section 6 inches or larger.
Tempering: Double tempering is preferable with the second temper 50 degrees lower than the first. The type of tool and service requirements largely determine the tempering temperature. For most applications, the tempering range is 900 F to 960 F. A minimum holding time of two hours for each inch of greatest thickness should be used. To minimize the possibility of cracking, temper immediately after hardening and heat slowly to desired temperature. D-2 normally shows a slight amount of contraction in size, however tempering at 900F or slightly higher usually neutralizes the process and brings the part back to its original size. Occasionally, a second or third attempt at 10 degrees over previous temperature may be used. Hardness produced in the range of Rockwell C 58 to 60. Final temper should be done at 25 to 50 F below previous temper.

Table Tempering Temperature (F) - Hardness (HRC)

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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

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