D2 Tool Steel
A:Specification
| Product | Material | Spec.(mm) | Length（mm) | Remark |
| Cold Work Steels | D2 | Φ12-130 | 3000-5800 | Hot Rolled、Annealed |
| Cold Work Steels | Φ65-420 | 3000-5800 | Forging 、Annealed 、Polished | |
| Cold Work Steels | Φ114-305 | 3000-5800 | Forging 、Annealed 、Smooth Machined | |
| Cold Work Steels | D2扁 | 25-60*255-405 | 3000-5800 | Forging 、黑皮 |
| Cold Work Steels | 100-150*610 | 3000-5800 | Forging 、黑皮、Electro-slag | |
| Cold Work Steels | 180-350*620 | 3000-5800 |
B: Performance Table
| General Information |
Steel with hardening air, oil and salts bath. It features good resistance and toughness for hot and treatments. Normally used for mould carrier frames, containers for pressure casting, sub-dies for extrusion of aluminum, plastic moulds. |
| Comparable Standards |
AISI/SAE DIN W.N AFNOR BS SIAU |
| D2 X155CrVMo12_1 1.2379 Z160CDV12 BD2 KORV | |
| Chenical Analysis (%) |
C Mn Si Cr MO V P S |
| 1.50-1.60 0.15-0.45 0.10.40 11.0-12.0 0.60-0.80 0.90-1.10 ≤0.03 ≤0.03 |
Heat Treatment
Isothermal annealing:
Heat to 850÷880℃;
Funace cooling to 770℃ and hold at temperature for at least 10 hours;
Cool by10℃/h to 720℃;
Cooling in air.
Stress relieving :
To be carried out after machining and befor the final heat trestment,
-Heat to 650÷700℃ , hold for 4/6 hours ;
-Furnace cooling to 330÷350℃
-Cooling in air
Hardening :
-Initial preheating to 350÷450℃;
-Second preheating to 750÷850℃ in sait bath at 850℃;
-Austenitizing at 960÷100℃;
-Cooling in air or in oil if large parts.
Quenched hardness:64÷65HRC
Tempering:
In the temperature range 150÷300℃ with minimum holding time 3h. For parts hardened at 1080÷1100℃, a first will be carried out at 500÷550℃ in order to expioit secondary handness, foliowed by a second tempering at 180/300℃
Tempering Curve (only for reference):
