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1.2379 Cold Work Tool Steel

US$ 1000
Min Order Quantity 3 ton / 3000
Port Wuhan
Delivery Lead Time 45-60 DAYS
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Quick Information

  • Brand Name :BETTER
  • Model Number :1.2379
  • Place of Origin :China
  • Application :Tool Steel Bar
  • Dimensions :16-800mm
  • Steel Grade :D2
  • Technique :Forged
  • Type :Alloy Steel Bar


Specification  :

Size round Dia 16mm~800mm
flat Thickness  16mm-500mm
Width   200mm-800mm
Technique Cold Drawn/Cold Pilfered/Cold Rolled/Hot Rolled/forge-
Process  EAF+LF+VD+ Forged/Hot rolled + Heat Treatment (Annealed,A Normalized, Q+T)
Heat treatment Normalized ; Annealed ; Quenched ; tempered
Surface Condition Black surface ; Grinded ; Machined;Turned
Inspection 100% Ultrasonic according to the test standards:SEP1921-84,CLASS C/c or D/d 
Payment Terms T/T;L/C
Trade Terms FOB;CIF,CFR
Packing Standard seaworthy packing or as customer required
Application various large-sized mirror plastic mould, precision plastic mould, like: cars accessies, home appliances, electronic equipment plastic mould



D2 is a high carbon - high chromium air hardening tool steel, heat treatable to 60-62 Rc. D2 offers excellent wear and abrasion resistance, due to large volumes of carbides in the microstructure. D2 is widely used in long production cold work applications requiring very high wear resistance and high compression strength. It is machinable in the annealed condition, and, like other air hardening tool steels, exhibits minimal distortion in heat treat. D2 is available in de-carb free rounds, flats, and squares, as well as ground flat stock and drill rod.


Chemical  Composition :

Steel Grade C Si Mn Cr Mo V   P S
D2 1.40-1.60 0.10-0.60 0.10-0.60 11.00-13.00 0.7-1.0 0.15-0.30 ≤0.03 ≤0.03


Applications include: 

Typical applications for D2 tool steel are blanking, forming, and trim dies, gages, slitting cutters, wear parts, lamination dies, thread rolling dies, drawing dies, rotary cutting dies, knurls, bending dies, gages, shear blades, burnishing tools, rolls, machine parts, master parts, injection screw and tip components, seaming rolls, extrusion dies, tire shredders, scrap choppers, etc.

Heating for forging must be done slowly and uniformly. Soak through at 1850°-1950°F and reheat as often as necessary, stopping work when the temperature drops below 1700°F. After forging, cool slowly in lime, mica, dry ashes or furnace. D2 should always be annealed after forging.

Heat slowly to 1550°-1600°F, hold until entire mass is heated through, and cool slowly in the furnace (40°F per hour) to about 1000°F, after which cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.

Stress relieving: 
When desirable to relieve the strains of machining, heat slowly to 1050°-1250°F, allow to equalize, and then cool in still air (Strain Relieving).

Preheat prior to hardening:
Preheat slowly to 1350°-1450°F and hold at this temperature until material is uniformly heated.

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

D2 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.

The tempering temperature may be varied according to the desired hardness. If maximum hardness is desired, tempering should be in the range 300°-400°F, but if a lower hardness is acceptable, tempering at 950°F will give the optimum combination of hardness and toughness.



  • Price Condition : FOB
  • Price : USD 1000 / 3000
  • Delivery Port : Wuhan

Packaging & Delivery

  • Delivery Lead Time : 45-60 DAYS
  • Minimum Order : 3 ton

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  • 1.2379 Cold Work Tool Steel

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1.2379 Cold Work Tool Steel

1.2379 Cold Work Tool Steel

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