Difference Between HCHCR steel and D2 steel material

We give the difference between HCHCR and D2 steel material below.

chemical composition difference between HCHCR and D2 steel.

that help to engineer in the material selection process.

D2 steels have high chromium content gives them mild corrosion-resisting properties.

it is a Cold-work tool steel grade and includes high-carbon, high-chromium steel.

Group D Cold-work tool steels include the high-carbon, high-chromium steels.

These steels are designated as group D steels and comprise D2, D3, D4, D5, and D7 steels.

These steels contain carbon 1.50 to 2.35% and 11% to 13.50% of chromium.

Except for type D3 steel, all the other group D steels include 1% Mo and are air-hardened.

Type D3 steel is oil-quenched; though small sections can be gas-quenched after austenitization using a vacuum.

As a result, tools made with type D3 steel are brittle during hardening.

Type D2 steel is the most commonly used steel among the group D steels.

Equivalent Steel Grades materials to D2 tool steels are followings:

  • DIN 1.2379 German standard.
  • NI KU.
  • B.S. BD 2.
  • ASTM A681 (American).
  • FED QQ-T-570.
  • SAE J437.
  • SAE J438.
  • UNS T30402.

Chemical Composition Difference Between HCHCR and D2 steel.

Chemical composition difference between HCHCR STEEL and d2 STEEL material typical.

ASTM A681C %SI %Cr %Mn %Mo %V %S %P %
AISI D2 Tool Steel2.00% ~ 2.35%0.10~0.6011.0~13.00.20~0.600.70~1.200.50~1.10≤0.030≤0.030
AISI D3 Tool Steel, HCRCR STEEL2.00~2.350.10~0.6011.0~13.50.20~0.60~~≤0.030≤0.030
Chemical composition difference between HCHCR STEEL and d2 STEEL material typical.
Mechanical Properties of D2 Tool Steel VSD3 Tool Steel    
D2 Tool SteelD3 Tool Steel
PropertiesMetricPropertiesMetric
Density7.7 x 1000 kg/m3Density7.7 x 1000 kg/m3
Melting point1421°CMelting point1421°C
Izod impact unnotched77.0 JIzod impact unnotched77.0 J
Poisson’s ratio0.27-0.30Poisson’s ratio0.27-0.30
Thermal expansion(20-100°C)10.4 x 10-6/ºCThermal expansion(20-100°C)12 x 10-6/ºC

Heat Treatment of Tool Steel D2 TOOL STEEL & D3 TOOL STEEL

Heat Treatment of D2 Tool Steel and D3 Tool Steel

    
Steel ASTM:D2Steel ASTM:D3
Post annealing hardness HBS:255Post annealing hardness HBS:255
After cold hardness HBS:269After cold hardness HBS:269
Preheat temperature / C: 816Preheat temperature / C: 816
Quenching temperature:996 C / | salt bath furnaceQuenching temperature:954 C / | salt bath furnace
Quenching temperature in temperature-controlled atmosphere furnace: 1010Quenching temperature in temperature-controlled atmosphere furnace: 968
Holding time /min:10 ~ 20Holding time /min:10 ~ 20
Quenching medium: Air coolingQuenching medium: Oil
Temper temperature / C:204Temper temperature / C:204
The hardness is larger than HRC: 59The hardness is larger than HRC: 61
Heat Treatment of D2 Tool Steel and D3 Tool Steel
Difference Between HCHCR steel and d2 steel material
Difference Between HCHCR steel and d2 steel material.

Jai Ganesh steel Company have a wide range of Mould steel grades.