D2 Tool Steel

Chemical Analysis:
Carbon 1.45/1.50
Manganese .60 Max.
Phosphorus .030 Max.
Sulfur .030 Max.
Silicon .60 Max.
Chromium 11.00/13.00
Vanadium 1.10 Max.
Tungsten -------
Molybdenum .70/1.20
Cobalt 1.00 Max.
Tempering Temp. º(F): Hardness Rc
As-Quenched 64.0
400 60.0
500 58.0
600 58.0
700 58.0
800 57.0
900 58.0/60.0
1000 56.0
1100 48.0
1200 40.0


Slitter knives, planer knives, shear blades, plastic granulator knives, punches, dies, form rolls, rolls, thread roll dies.


Preheat to 1250° F and soak thoroughly.  Then raise to 1950° F - 2050° F.  Do not forge or roll below 1700° F, cool slowly from the forging or rolling temperature.  Do not normalize.


Heat slowly to 1600° F - 1650° F, and hold for uniformity.  Cool at a rate of 20° F per hour to 900° F.   Furnace cool slowly.  Expected Brinell hardness 229 max.


Preheat to 1200° F - 1250° F, soak until uniformly heated, and either transfer or raise furnace temperature to 1850° F, and hold 1 hour per inch of greatest thickness.  Quench into 150° F oil.


Temper immediately after quenching, before part has cooled to below 150° F.  D-2 parts should always be double tempered and the parts should be held a minimum of 2 hours per inch of greatest thickness.  For most applications the tempering range for the D-2 analysis is 900° F - 960° F.  The above tempering table may be used as a guide.  However, since 1/2" dia. specimens were used for this test, it may be found that heavier sections are several points lower.