Material Steel AISI D2 SKD11 DIN 1.2379 Tool Steel Forged Bar

Material Steel AISI D2 SKD11 DIN 1.2379 Tool Steel Forged Bar

1: AISI D2 Steel Introduction

D2 steel is a high-carbon, high-chromium cold work tool steel with high wear resistance and microdeformation properties. It contains up to 1.5% carbon and 11.5% chromium, and has a hardness of up to 60 HRC after heat treatment, which makes it extremely wear-resistant.D2 tool steel has good dimensional stability while maintaining high hardness D2 material steel has good machinability, including excellent dimensional stability and a good match between surface hardness and body toughness. It can be vacuum heat-treated to HRC60°-62°, which further improves its hardness and wear resistance. The heat treatment process includes preheating, heating, holding, air cooling and tempering steps to ensure that the steel's properties are optimized.D2 steel also has excellent hardenability, hardenability and oxidation resistance at high temperatures, as well as good resistance to rust and corrosion and small heat treatment distortion.

D2 Steel Stock in Warehouse

2: AISI D2 Quality Standard

AISI D2 steel according to ASTM A681.

3: AISI D2 Steel Equivalent

4: AISI D2 Steel Chemical Composition

5: AISI D2 Steel Mechanical Properties  

The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment, the mechanical properties will be different, such as normalized, tempered, QT. If you want to know the properties, kindly contact the salesman.

6: AISI D2 Steel Overviews

7: AISI D2 Steel Application

D2 used for Blanking Dies, Forming Dies, Coining Dies, Slitting Cutters, Heading Tools, Long Punches, Forming Rolls, Edging Rolls, Master Tools, Beading Rolls, Intricate Punches, Extrusion Dies, Drawing Dies, Lamination Dies, Thread Rolling Dies, Shear Blades, Burnishing Tools, Gauges, Knurls, Wear Parts.

8: AISI D2 Steel Heat Treatment

ASTM D2 steel should be preheated very slowly to 815℃ (1500°F) and then temperature can be increased to 1010oC (1850°F). They are then held at 1010oC (1850°F) for 20 to 45 minutes and air cooled (air quenched).

Annealing

Annealing of D2 material steel should be done at 871 to 898°C (1600 to 1650°F) followed by slow furnace cooling at 4.4°C (40°F) per hour or less.after which cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.

Hardening

After thorough preheating, heat to 1800°-1850°F. Hold the work piece at the hardening temperature until it is completely and uniformly heated.

Quenching

AISI D2 steel tool material is an air hardening steel and will develop hardness on cooling in still air. To avoid scaling and prevent decarburization of the work piece surface, controlled atmosphere or vacuum furnaces are recommended. If these furnaces are not available, pack hardening, salt baths or wrapping the piece in stainless steel foil will provide some degree of surface protection in the hardening process. Parts should be allowed to cool to 150F, or to where they can be held in the bare hand, and then temper immediately.

Tempering

The tempering temperature on material D2 steel may be varied according to the desired hardness. D2 steels can be tempered at 204°C (400°F) for achieving Rockwell C hardness of 61 and at 537°C (1000°F) for a Rockwell C hardness of 54.

9: AISI D2 Steel Tolerance

10: Delivery Condition

For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed or QT, black surface or rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed or QT, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed or QT, black surface.