Supreme Steel industries is a leading D2 Importers,D2 Importers in India, D2 Importers in mumbai,Company located in Mumbai,India.
Description:
AISI D2 is a high-carbon, high-chromium tool steel alloyed with molybdenum and vanadium characterized by:
* High wear resistance
* High compressive strength
* Good through-hardening properties
* High stability in hardening
* Good resistance to tempering-back.
| Designations |
| China |
USA |
Japan |
Germany |
| GB Cr12Mo1V1 |
AISI D2 |
JIS SKD11 |
W.Nr. 1.2379
X155CrVMo 12- 1
X153CrMoV 12 |
| Chemical composition ( in weight % ) |
| Grade |
C |
Si |
Mn |
Cr |
Mo |
V |
| D2 |
1.55 |
0.30 |
0.40 |
11.80 |
0.80 |
0.80 |
Applications:
AISI D2 is recommended for tools requiring very high wear resistance, combined with moderate toughness (shock-resistance).
Deep drawing and forming dies, cold drawing punches, hobbing, blanking, lamination and stamping dies, shear blades, burnishing rolls, master tools and gauges, slitting cutters, thread rolling & wire dies, extrusion dies etc
Heat treatment:
Soft annealing
Protect the steel and heat through to 1560°F (850°c).
Then cool in the furnace at 20°F (10°c) per hour to 1200°F (650°c), then freely in air.
Stress Relieving:
After rough machining the tool should be heated through to 1200°F (650°c), holding time 2 hours.
Cool slowly to 930°F (500°c), then freely in air
Hardening
Preheating temperature: 1110–1290°F (650–750°c).
Austenitizing temperature: 1810–1920°F (990–1050°c) but usually 1830–1905°F (1000–1040°c).
| Temperature |
Soaking time minutes |
Hardeness before tempering |
| °F |
°C |
|
|
| 1815 |
990 |
60 |
approx. 63 HRC |
| 1850 |
1010 |
45 |
approx. 64 HRC |
| 1885 |
1030 |
30 |
approx. 65 HRC |
Quenching Media:
* Oil (Only very simple geometries)
* Vacuum (high speed gas)
* Forced air/gas
* Martempering bath or fluidized bed at 360–930°F (180–500°c), then cooling in air.
Note: Temper the tool as soon as its temperature reaches 120–160°F (50–70°c).
AISI D2 hardens through in all standard sizes.
Tempering:
Choose the tempering temperature according to the hardness required by reference to the tempering graph.
Temper twice with intermediate cooling to room temperature. Lowest tempering temperature 360°F (180°c).
Holding time at temperature minimum 2 hours.
High temperature tempering at greater than 950°F (510°c) is recommended if dimensional stability of tooling is critical,
if significant wire EDM operations are planned in the hardened state, or if tools are to be coated.
