A2 Tool Steel
A2 tool steel is an air hardening, cold work steel. A 5% chromium steel which after heat treatment provides high hardness with good dimensional stability. After heat treatment A2 will offer a hardness in the range 57-62 HRC.
We can supply A2 tool steel from stock in flats and squares, hot rolled rounds, bright drawn rounds in imperial and metric sizes.
A2 delivers good balance between toughness combined with medium wear resistance and is relatively easy to machine. A2 is used in many applications which require good wear resistance as well as good toughness.
Typical Applications: blanking tools, punch dies, trim dies, forming dies, gauges, shear , blades, stamping dies.
AISI A2 equivalent grades: BS4659 – BA2, AISI – A2, DIN – 1.2363 – X100CrMoV5
Typical chemical composition of AISI A2 Tool Steel |
|||||
|---|---|---|---|---|---|
|
C |
Mn |
Cr |
Ni |
Mo |
V |
| 1.00% | 1.0% | 5.00% | 0.30% | 1.0% | 0.15-0.5% |
Forging A2 Tool Steel:
Heat slowly to 700°C then more rapidly to 1050-1100°C. Avoid working below 900°C. Reheat as often as necessary to maintain proper forging temperature. After forging cool very slowly.
Annealing:
Soak thoroughly at 840-850°C, then slow furnace cool at a rate of not more than 20°C per hour. After annealing A2 a maximum hardness of 215 Brinell may be achieved
Hardening:
Pre heat slowly to 600-700°C and soak. Continue heating to the final hardening temperature of 950/980°C and allow the component to equalise. Quench in oil or cool in air.
Tempering:
Heat uniformly and thoroughly to the desired temperature and hold for 25 minutes per cm of thickness. A2 can be double tempering, after intermediate cooling to room temperature. Temper at 200°C for a balance of hardness and strength or 350°C where strength is more important than hardness.
Tempering A2 Tool Steel |
||||||
|---|---|---|---|---|---|---|
| Tempering °C |
150 |
200 |
250 |
300 |
350 |
400 |
| HRC |
62/61 |
61/60 |
60/59 |
59/58 |
58/57 |
58/57 |
