AISI D2 plastic mold tool steel Manufacturer and Exporter,supplied with round,square,and flat.AISI D2 is a high-carbon, high-chromium tool steel alloyed with molybdenum and vanadium as per ASTM A 681 standard.It is the most commonly used steel among the group D steels.It has high abrasive wear resistance,high compressive strength ,good through-hardening properties,high stability in hardening and good resistance to tempering-back. AISI D2 is often supplied in annealed condition.
1.Supply Form & Size & Tolerance
|Φ6-Φ100||Cold Drawn||Bright/Black||Best H11|
Remark:Tolerance can be customized as per requests
|DIN ISO 4957||1.2379||1.45-1.6||0.15-0.6||0.2-0.6||0.03||0.03||11.0-13.0||0.7-1.0||0.7-1.0|
|Modulus of elasticity,Mpa||210000||200000||180000|
Coefficient of thermal expansion
|low temperature tempering per °C from 20°C||–||12.3 x 10^–6||–|
|high temperature tempering per °C from 20°C||–||11.2 x 10^–6||12 x 10^–6|
|Thermal conductivity,W/m °C||20||21||23|
|Specific heat,J/kg °C||460||–||–|
4. Mechanical Property
|Hardness, Knoop (converted from Rockwell C hardness)||769||769|
|Hardness, Rockwell C||62||62|
|Izod impact unnotched||77.0 J||56.8 ft-lb|
|Elastic modulus||190-210 GPa||27557-30457 ksi|
|Hardness||Compressive yield strength, Rc 0.2|
Heat the D2 tool steel slowly and uniformly to 700°C then more rapidly to 900-1040°C. Reheat is necessary when temperature is below 900°C.AISI D2 steel should be cooled as slowly as possible in furnace,and annealing is strongly recommended after forged.
Annealing must be performed after hot working and before re-hardening. Heat at a rate not exceeding 220°C per hour to 870-900°C, and hold at temperature for 1 hour per inch (25.4mm) of maximum thickness; 2 hours minimum. Then cool slowly with the furnace at a rate not exceeding 20°C per hour to 530°C. Continue cooling to room temperature in the furnace or in air. The resultant hardness should be a maximum of 255 HBW.
After rough machining,AISI D2 steel should be heated throughly to 600-650°C, holding time 2 hours. Cool slowly to 500°C, then freely in air.
Preheating temperature: 650–750°C.
Austenitizing temperature: 990– 1050°C, but usually 1000–1040°C.
|Temperature , °C||Soaking time Min.||Hardness before tempering|
|990||60||approx. 63 HRC|
|1010||45||approx. 63 HRC|
|1030||30||approx. 63 HRC|
• Oil (Only very simple geometries)
• Vacuum (high speed gas)
• Forced air/gas
• Martempering bath or fluidized bed at 180–500°C, then cooling in air.
Temper immediately after quenching. Hold at temperature for 1 hour per inch (25.4 mm) of thickness, 2 hours minimum, then air cool to ambient temperature. The typical tempering range is 180 to 210ºC.Double tempering is recommended.
AISI D2 is used in a wide variety of tool making applications.Use D2 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.
Typical applications includes :Cutting, punching, stamping tools, shear blades, thread rolling dies, cold extrusion dies, drawing and bending tools, flanging and straightening rolls, fine cutting tools, deep drawing tools, plastic moulds for abrasive polymers