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SAE-AISI A2 Tool Steel (T30102) Air-Hardening Steel

A2 Tool Steel is an air-hardening, medium-alloy tool steel known for its good toughness and moderate wear resistance. It has a balanced composition, including around 1% carbon, 5% chromium, and small amounts of molybdenum and vanadium, which provides good hardness and stability during heat treatment. A2 is commonly used in applications that require high precision and durability, offering a good balance between wear resistance and impact toughness.

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A2_tool_steel

our A2 Tool Steel Supply: Available Forms and Sizes

FormThickness / DiameterWidthLength
A2 Tool Steel Sheets1 mm – 20 mm300 mm – 1200 mm1000 mm – 3000 mm
A2 Tool Steel Plates10 mm – 80 mm500 mm – 2000 mm1000 mm – 6000 mm
A2 Tool Steel Round Bars10 mm – 400 mm diameter1000 mm – 6000 mm
A2 Tool Steel Flat Bars5 mm – 80 mm thickness20 mm – 500 mm1000 mm – 6000 mm
A2 Tool Steel BlocksCustomizable thicknessCustomizableCustomizable
A2 Tool Steel Square Bars10 mm – 200 mm10 mm – 200 mm1000 mm – 6000 mm

Notes:

  • Custom Sizes: Available upon request based on specific requirements.
  • Tolerance: Dimensions may vary based on industry standards and client specifications.
  • Heat Treatment: A2 Tool Steel can be supplied in annealed or pre-hardened conditions.

A2 Tool Steel material properties datenblatt as below:

chemical composition of A2 Tool Steel

Physical Properties of A2 Tool Steel

Physical PropertyValue
Density7.7 g/cm³
Thermal Expansion11.7 x 10⁻⁶ /°C (20-100°C)
Thermal Conductivity24.5 W/m·K at 20°C
Specific Heat Capacity460 J/kg·K
Electrical Resistivity0.70 x 10⁻⁶ Ω·m
Melting Point1420 – 1460°C

Mechanical Properties of A2 Tool Steel

Mechanical PropertyValue
Hardness (Rockwell)57 – 62 HRC (after heat treatment)
Tensile StrengthApproximately 1,930 MPa (depends on heat treatment)
Yield StrengthApproximately 1,450 MPa
Impact ToughnessModerate (better than high-carbon tool steels)
Modulus of Elasticity210 GPa
Elongation at Break8 – 10% (varies with treatment)

Applications of a2 Tool Steel:

  • Punches and Dies: Ideal for precision tooling requiring toughness.
  • Blanking Tools: Suitable for high-impact blanking and forming.
  • Shear Blades: Effective for shearing applications due to its wear resistance.
  • Molds and Injection Dies: Used in molds for plastic and rubber.
  • Cutting Tools: Reliable for blades, knives, and trimming tools.

Different Designations for a2 Tool Steel:

StandardDesignation
UNST30102
AISI/SAEA2
DIN1.2363
JISSKD12
ISOX100CrMoV5
BSBA2
ENX100CrMoV5-1

Processing and heat treatment of A2 tool steel:

Forging

A2 Tool Steel should be slowly heated to 700°C, then quickly brought up to 1050-1100°C. Work should be performed below 900°C to avoid overheating. If necessary, the steel can be reheated to maintain optimal forging temperature. After forging, allow the steel to cool slowly.

Annealing

Annealing is performed by heating the A2 steel to 840-850°C, followed by soaking at this temperature and then cooling at a rate not exceeding 20°C per hour until reaching room temperature. This process will yield a maximum hardness of approximately 215 HB.

See also  M2 Tool Steel

Stress Relieving

After heavy grinding or machining, it is recommended to stress relieve A2 Tool Steel to minimize the risk of warping or cracking during subsequent heat treatment. This is done by heating slowly to 670-700°C, soaking for two hours per 25 mm of thickness, then allowing it to cool in air.

Hardening

A2 Tool Steel should be preheated thoroughly to 600-700°C, then rapidly heated to the final hardening temperature of 950-980°C, ensuring uniform heating. After reaching the target temperature, the steel should be quenched in oil or air, depending on the desired properties.

Tempering

Temper A2 Tool Steel immediately after hardening. It should be reheated at intervals of 5 minutes per millimeter of thickness and tempered two to three times. For optimal toughness, tempering should be performed at 200°C or higher, which achieves a balance between hardness and toughness. For enhanced toughness, tempering at 350°C is recommended.

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