Introduction
Cold heading steel 45Mn, also known as alloy tool steel, is a kind of medium carbon tool steel with certain impact toughness and good comprehensive performance. The process performance of cold heading steel 45Mn is excellent, and the products processed from it have relatively good strength and simple production process.
Composition
The composition of cold heading steel 45Mn is mainly expressed in percentage of the mass, including 0.42～0.50% for Carbon (C), 0.17～0.37% for Silicon (Si), 0.90～1.20% for Manganese (Mn), 0.25～0.45% for Chromium (Cr) and ≤ 0.035% for Phosphorus (P), 0.03～0.05% for Sulphur (S).
Process performance
The process performance of cold heading steel 45Mn is relatively excellent. From the analysis on its composition, we can see that this type of steel has good hardenability, and the surface of its products after quenching and tempering can reach HRC 40-50. Cold heading steel 45Mn also has relatively good thermal strength and wear resistance. When heated, it has a low temperature tendency and does not deform easily. It has a fair impact toughness and a good cutting performance. It also has good uniformity and consistency, which makes the products made from it exhibit even shapes and sizes.
Application
Cold heading steel 45Mn are mainly used to produce cold heading products, such as screws, nuts, bolts, rivets, pins, and other fasteners, as well as cold stamping and forming products. It is also applicable in the production of cold heading tools such as punches, dies, dies, and casings.
Conclusion
In conclusion, cold heading steel 45Mn is a kind of medium carbon tool steel with great hardness and comprehensive performance, which is suitable for the production of screws, nuts, bolts, rivets, pins, die-casting dies and cold stamping products. It has excellent functions in terms of hardenability, thermal strength, and wear resistance. Thus, it has become a common and qualified material for the production of fasteners and related products.
