SKD 12 X100CrMoV5 1.2363 AISI A2 Tool Steel Bar

AISI  A2 Tool Steel Bar a2 tool steel SKD 12 X100CrMoV5 1.2363 AISI  A2 Tool Steel Bar AISI A2 Tool Steel Bar

AISI A2 Tool Steel Bar


AISI A2 Tool Steel Bar, with maximum dimensional stability during heat treatment, offering high abrasion resistance and good toughness. Generally supplied annealed to HB 231 max. A2 tool 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 tool steel takes a place in tool steel range between AISI O1 tool steel and AISI D2 tool steel, offering an excellent combination of good wear resistance and toughness. It may be regarded, therefore, as a “universal” cold work tool steel.
For cutting operations the good toughness of AISI A2 tool steel 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. 1.2080 type.
AISI A2 tool 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.

Quality Standard

: 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

Chemical Composition(%)

C Si Mn P S Cr Mo V
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 & tempered

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 tool steel 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 tool steel 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.

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