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A2 / 1.2363 Special Alloy Steel Round Bar , Black / Bright Surface Tool Steel

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A2 / 1.2363 Special Alloy Steel Round Bar , Black / Bright Surface Tool Steel

Brand Name : UST
Model Number : DIA16-500mm
Certification : ISO9001
Place of Origin : China
MOQ : MOQ: 2-3 ton
Price : USD 1500- 2300/ton
Supply Ability : 1200 ton/month
Delivery Time : Within 5-35 days
Packaging Details : Plastic plugs in both ends, Hexagonal bundles of max 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips.
Material : Tool Steel
Delivery condition : Annealed
Surface : Black or Bright
UT : According 1921-84
Inspection : The third party is acceptable
Diameter : 16-500mm
Length : 1-6mm
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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 work steel.
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.

Quality Standard

ASTM A681 – 08 Standard Specification for Tool Steels Alloy.

All Grades Comparison

ASTM A681WerkstoffBS 4659BS EN ISO 4957AFNORASJIS G4404
A21.2363/X100CrMoV5BA2X100CrMoV 5Z 100 CDV 5A2ASKD 12

Chemical Composition(%)

0.95-1.050.10-0.500.40-1.000.030 max0.030 max4.75-5.500.90-1.400.15-0.50

Typical Hardness/Applications-Air cooled at 930°C–970°C & tempered

Temper (°C)Hardness (HRC)Typical Applications
15062–63Brick mould liners, gauges, guide pins, thread rolling dies
15061–63Blanking and bending dies, forming rolls
20060–62Crimping, cold heading and coining dies, paper slitters
20058–62Forming tools and roller guide rolls, hobbing punches
25058–60Gripper and trimming dies, cold shear blades
25057–60Cold forging dies, coining dies, knives
40056–58Shear blades, wire drawing grips
55054–56Parts 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.


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