Release time：2020-01-16 18:44 Browse：
The performance of long screws can be significantly influenced by the raw materials sourced from different steel mills. Here's how:
Chemical composition stability: Even within the same grade (e.g., 10B21, 40Cr), different mills may have slight variations in carbon, manganese, chromium, etc., affecting hardness, tensile strength, and ductility after heat treatment.
Impurity control: Reputable mills keep harmful elements like sulfur and phosphorus to a minimum, reducing risks of cracking, brittleness, or machining defects.
Steel cleanliness and uniform microstructure: High cleanliness improves formability and ensures consistent mechanical properties, which is especially critical in cold heading and thread rolling.
Heat treatment response: Steel from different mills may behave differently during carburizing, quenching, or tempering, affecting surface hardness, core strength, and dimensional stability.
Surface quality: Smooth, defect-free surfaces reduce mold wear and improve coating or plating outcomes.
In conclusion, using raw materials from high-quality steel mills is essential to ensure the durability, precision, and reliability of long screws, especially under demanding applications.
