Tool and Die Steel A2 Bars are well-known for their fantastic mix of hardness, toughness, and wear resistance, making them perfect for precision tooling and die-making tasks. Crafted under strict quality guidelines, these bars deliver reliable performance even in tough industrial settings. Their ability to keep their shape during heat treatment and resist deformation under heavy loads guarantees they’ll last and operate dependably. Manufacturers often turn to A2 steel bars for durable, high-performance materials needed for tools that demand both strength and resistance to abrasion, impact, and moderate thermal stress.
A2 Bars are made from high carbon and chromium, along with extra elements like molybdenum and vanadium to boost wear resistance and toughness. This unique alloy structure results in high hardness, good dimensional stability, and moderate toughness, making it suitable for cold-work tooling. Mechanically, A2 steel shows impressive compressive strength, resistance to deformation, and a nice balance of hardness and ductility after heat treatment. These characteristics allow it to excel in precision applications where repeated mechanical stress and wear resistance are crucial.
| ASTM A681 | C | Mn | P | S | Si | Cr | V | Mo | ||||||
| A2/T30102 | 0.95 | 1.05 | 0.40 | 1.00 | 0.03 | 0.03 | 0.10 | 0.50 | 4.75 | 5.50 | 0.15 | 0.50 | 0.90 | 1.40 |
| DIN ISO 4957 | C | Mn | P | S | Si | Cr | V | Mo | ||||||
| 1.2363/X100CrMoV5 | 0.95 | 1.05 | 0.40 | 0.80 | 0.03 | 0.03 | 0.10 | 0.40 | 4.80 | 5.50 | 0.15 | 0.35 | 0.90 | 1.20 |
| JIS G4404 | C | Mn | P | S | Si | Cr | V | Mo | ||||||
| SKD12 | 0.95 | 1.05 | 0.40 | 0.80 | 0.03 | 0.03 | 0.10 | 0.40 | 4.80 | 5.50 | 0.15 | 0.35 | 0.90 | 1.20 |
| BS 4659 | C | Mn | P | S | Si | Cr | V | Mo | ||||||
| BA2 | 0.95 | 1.05 | 0.30 | 0.70 | 0.035 | 0.035 | . . . | 0.40 | 4.75 | 5.25 | 0.15 | 0.40 | 0.90 | 1.10 |
| Properties | Metric | Imperial |
| Hardness, Rockwell C (as air-hardened (63-65 HRC average), 60-62 HRC at 205°C, 59-61 HRC at 260°C, 58-60 HRC at 315°C, 57-59 HRC at 370°C and 425°C and 480°C, 56-58 HRC at 540°C, 50-52 HRC at 595°C, 42-44 HRC at 650°C) | 64 | 64 |
| Bulk modulus (typical for steels) | 140 GPa | 20300 ksi |
| Machinability (based on carbon tool steel) | 65% | 65% |
| Shear modulus | 78.0 GPa | 11300 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elastic modulus | 190-210 GPa | 27557-30457 ksi |
| Country | USA | German | Japan | British |
| Standard | ASTM A681 | DIN EN ISO 4957 | JIS G4404 | BS 4659 |
| Grades | A2/T30102 | 1.2363/X100CrMoV5 | SKD12 | BA2 |
| Properties | Conditions | ||
|---|---|---|---|
| T (°C) | Treatment | ||
| Thermal expansion | 10.7 x 10-6/ºC | 20-100 | – |
The standard annealing temperature for A2 tool and die steel bars is typically between 800°C to 850°C (1472°F to 1562°F), followed by slow cooling to relieve internal stresses and soften the material.
A2 tool and die steel bars resist corrosion through their high chromium content, forming a protective oxide layer that enhances resistance to rust and wear, especially in cold-work applications.
Tool and die steel A2 bars should be stored in a dry, cool environment, away from moisture and corrosive elements. Ensure proper ventilation and avoid direct contact with the ground to prevent rust.
You’ll find Tool and Die Steel A2 Bars commonly used in the production of cutting tools, dies, punches, shear blades, and forming tools for cold-working applications. They’re particularly favored in industries like automotive, metalworking, and manufacturing, where precision, durability, and wear resistance are essential. A2 bars are also utilized in creating jigs, gauges, and stamping tools that need to perform reliably over time. With their blend of hardness, toughness, and dimensional stability, A2 steel bars guarantee consistent quality, reliability, and efficiency across a variety of industrial tooling and machining operations.






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