| C | Si | Mn | S | P | Cr | Ni | Cu |
| 0.75～0.84 | ≤0.35 | ≤0.40 | ≤0.020 | ≤0.030 | ≤0.25 | ≤0.20 | ≤0.30 |
T8A is suitable for manufacturing lightweight tools such as cold heading dies, punches, woodworking tools, etc. The performance can be improved by water cooling quenching at 780-800 ℃ and low-temperature tempering, while water spraying quenching or carbide ultrafine treatment can significantly extend the mold life. For example, the cold heading mold life of M12 bolts can reach 6000 pieces, and the concave mold life of truck compartment bolts can exceed 20000 times. In the future, it is possible to optimize applications through alloying improvements and 3D printing technology.
1. Manufacturing cutting tools, bearings, valves, pumps, etc.
2. Make willow nail molds with a hardness of 51-53HRC after quenching.
3. Produce a cold heading truck carriage bolt die using inner hole water spray quenching.
4. Manufacturing concave convex molds for general stretching molds.
| C | Si | Mn | S | P | Cr | Ni | Cu |
| 0.75～0.84 | ≤0.35 | ≤0.40 | ≤0.020 | ≤0.030 | ≤0.25 | ≤0.20 | ≤0.30 |
T8A is suitable for manufacturing lightweight tools such as cold heading dies, punches, woodworking tools, etc. The performance can be improved by water cooling quenching at 780-800 ℃ and low-temperature tempering, while water spraying quenching or carbide ultrafine treatment can significantly extend the mold life. For example, the cold heading mold life of M12 bolts can reach 6000 pieces, and the concave mold life of truck compartment bolts can exceed 20000 times. In the future, it is possible to optimize applications through alloying improvements and 3D printing technology.
1. Manufacturing cutting tools, bearings, valves, pumps, etc.
2. Make willow nail molds with a hardness of 51-53HRC after quenching.
3. Produce a cold heading truck carriage bolt die using inner hole water spray quenching.
4. Manufacturing concave convex molds for general stretching molds.
