A-2 is an air hardening chromium-molybdenum-vanadium alloy die steel. This grade offers intermediate abrasion resistance generally between O-1 and D-2. A-2 is characterized by: – Good wear resistance – Good machinability – High compressive strength – Very good non-deforming properties – Deep hardening – High dimensional stability after hardening and tempering
A-2 is an air hardening chromium-molybdenum-vanadium alloy die steel. This grade offers intermediate abrasion resistance generally between O-1 and D-2. A-2 is characterized by: – Good wear resistance – Good machinability – High compressive strength – Very good non-deforming properties – Deep hardening – High dimensional stability after hardening and tempering
| C | CO | CR | MN | MO | NI | P | S | SI | V | W |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.95 – 1.05 | 4.75 – 5.50 | 0.40 – 1.00 | 0.90 – 1.40 | 0.10 – 0.50 | 0.15 – 0.50 |
Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • Standard
| Bending Dies | Blanking Dies | Block Gauges |
| Cams | Coining Dies | Cold Forming Dies |
| Cold Shears | Cold Trimming Dies | Forming Dies |
| Knurls | Machine Parts | Mandrels |
| Plastic Mold Dies | Punch Plates | Punchers |
| Reamers | Ring Gauges | Roll Threading Dies |
| Rolls | Shear Blades | Slitters |
| Stamping Dies | Threading Taps | Trimming Dies |
A-2 Air Hardening Tool Steel-US
Krovan AISI A-2 Air Hardening Tool Steel-US
AFNOR Z 100 CDV 5-France
DIN 1.2363-Germany
JIS SKD 12-Japan
SS 2260-Sweden
B.S. BA 2-United Kingdom
ASTM A681-US
FED QQ-T-570-US
SAE J437-US
SAE J438-US
UNS T30102-US
AISI A2 Cold Work Tool Steel-US
| Treatment | Temperature Range | Cooling/Quenching | Notes |
|---|---|---|---|
| Forging | 2000-2100° F | Cool Slowly | Heat slowly and uniformly. Cool in vermiculite or in other insulating media. Anneal after forging. |
| Annealing | 1545-1580° F | Cool slowly at a rate of 25° F per hour to 1110° F. | Protect against surface decarburization using controlled atmosphere or by pack-annealing. |
| Stress Relieving | 1020-1200° F | Cool slowly in furnace to 950° F. Then in air. | Stress relieve after rough machining |
| Preheating | 1450-1500° F | Preheat time in furnace is ¾ Hr. per inch of thickness. Heating up to temperature as slow as possible. | |
| Hardening | 1700-1800° F | In air. | Temper immediately after hardening. Allow to cool to 125-150° F before tempering. Soak time is 15 minutes per inch of thickness. Minimum of 30 minutes. |
| Tempering | Complete equalization of temperature throughout the tools is essential for good results. Double temper. Recommended temperature is 400-1000° F. |