D2 Tool Steel Pipe

D2 Tool Steel Pipe

1: D2 Steel Introduction

Cold Works SKD11 tool steel is a high carbon, high chromium tool steel (12% chrome) with extremely high wear resisting properties, heat treatable to 60-62 Rc. SKD11 steel is very wear resistant but not as tough as lower alloyed steels. D2 tool steel hardens in air with a low order of movement and offers a measure of corrosion resistance when polished. The high percentage of chromium gives it mild corrosion-resisting properties in the hardened condition. The mechanical properties of SKD11 are very sensitive to heat treatment. D2 steel is available in de-carb free rounds, flats, and squares, as well as ground flat stock and drill rod.

D2 Steel Stock In Warehouse

2: D2 Quality Standard

ASTM-A681-2008 ENG Standard-Specification-for-Tool-Steel-Alloy.pdf

3: D2 Steel Equivalent

4: D2 Steel Chemical Composition

5: 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: D2 Steel Overviews

7: 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: D2 Steel Heat Treatment

ASTM D2 steels alloy 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 tool steels material 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: Alloy Round Bar Tolerance

10: Delivery condition
For hot forged bar, usually the delivery condition is hot forged, annealed rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed, Black surface.
For hot forged plate, usually the delivery condition is hot forged, annealed, milled surface
For hot rolled plate, usually the delivery condition is hot rolled, annealed, black surface.