A2/1.2363/X100CrMoV5 special tool steel
AISI A2 Cold Work Tool Steel air hardening, with maximum
dimensional stability during heat treatment, offering high abrasion
resistance and good toughness. Generally supplied annealed to HB
231 max. A2 steel is an air hardening, cold work, tool steel. A 5%
Chromium steel which provides high hardness after heat treatment
with good dimensional stability. It is heat treatable and will
offer a hardness in the range 57-62 HRC.
AISI A2 steel takes a place in tool steel range between AISI O1 and
AISI D2, offering an excellent combination of good wear resistance
and toughness. It may be regarded, therefore, as a “universal” cold
For cutting operations the good toughness of AISI A2 gives
excellent resistance to chipping of the cutting edge. In many cases
tools made from this steel have given better tooling economy than
high-carbon, high-chromium steels of the D3/W.-Nr. 2080 type.
AISI A2 steel has much better machining and grinding properties.It
can be used to make 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, etc.
ASTM A681 – 08 Standard Specification for Tool Steels Alloy.
All Grades Comparison
|ASTM A681||Werkstoff||BS 4659||BS EN ISO 4957||AFNOR||AS||JIS G4404|
|A2||1.2363/X100CrMoV5||BA2||X100CrMoV 5||Z 100 CDV 5||A2A||SKD 12|
|0.95-1.05||0.10-0.50||0.40-1.00||0.030 max||0.030 max||4.75-5.50||0.90-1.40||0.15-0.50|
Typical Hardness/Applications-Air cooled at 930°C–970°C &
|Temper (°C)||Hardness (HRC)||Typical Applications|
|150||62–63||Brick mould liners, gauges, guide pins, thread rolling dies|
|150||61–63||Blanking and bending dies, forming rolls|
|200||60–62||Crimping, cold heading and coining dies, paper slitters|
|200||58–62||Forming tools and roller guide rolls, hobbing punches|
|250||58–60||Gripper and trimming dies, cold shear blades|
|250||57–60||Cold forging dies, coining dies, knives|
|400||56–58||Shear blades, wire drawing grips|
|550||54–56||Parts requiring maximum toughness|
Forging: 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. Heat
slowly and uniformly. Cool in vermiculite or in other insulating
media. Anneal after forging.
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.Protect against surface
decarburization using controlled atmosphere or by pack-annealing.
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.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: 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.Complete equalization of temperature
throughout the tools is essential for good results. Double temper.
Recommended temperature is 400-1000° F.
Mill′s test certificate
EN 10204/3.1 with all relevant data reg. chem. composition, mech.
properties and results of testing.