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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our A2 Tool Steel Supply: Available Forms and Sizes
Form | Thickness / Diameter | Width | Length |
---|---|---|---|
A2 Tool Steel Sheets | 1 mm – 20 mm | 300 mm – 1200 mm | 1000 mm – 3000 mm |
A2 Tool Steel Plates | 10 mm – 80 mm | 500 mm – 2000 mm | 1000 mm – 6000 mm |
A2 Tool Steel Round Bars | 10 mm – 400 mm diameter | – | 1000 mm – 6000 mm |
A2 Tool Steel Flat Bars | 5 mm – 80 mm thickness | 20 mm – 500 mm | 1000 mm – 6000 mm |
A2 Tool Steel Blocks | Customizable thickness | Customizable | Customizable |
A2 Tool Steel Square Bars | 10 mm – 200 mm | 10 mm – 200 mm | 1000 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
Element | Content (%) |
---|---|
Carbon (C) | 0.95 – 1.05 |
Chromium (Cr) | 4.75 – 5.50 |
Molybdenum (Mo) | 0.90 – 1.40 |
Vanadium (V) | 0.15 – 0.50 |
Manganese (Mn) | 1.00 max |
Silicon (Si) | 0.50 max |
Phosphorus (P) | 0.03 max |
Sulfur (S) | 0.03 max |
Physical Properties of A2 Tool Steel
Physical Property | Value |
---|---|
Density | 7.7 g/cm³ |
Thermal Expansion | 11.7 x 10⁻⁶ /°C (20-100°C) |
Thermal Conductivity | 24.5 W/m·K at 20°C |
Specific Heat Capacity | 460 J/kg·K |
Electrical Resistivity | 0.70 x 10⁻⁶ Ω·m |
Melting Point | 1420 – 1460°C |
Mechanical Properties of A2 Tool Steel
Mechanical Property | Value |
---|---|
Hardness (Rockwell) | 57 – 62 HRC (after heat treatment) |
Tensile Strength | Approximately 1,930 MPa (depends on heat treatment) |
Yield Strength | Approximately 1,450 MPa |
Impact Toughness | Moderate (better than high-carbon tool steels) |
Modulus of Elasticity | 210 GPa |
Elongation at Break | 8 – 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:
Standard | Designation |
---|---|
UNS | T30102 |
AISI/SAE | A2 |
DIN | 1.2363 |
JIS | SKD12 |
ISO | X100CrMoV5 |
BS | BA2 |
EN | X100CrMoV5-1 |
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.
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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