What is the difference between fixed plates made of ordinary cast iron and high-quality gray cast iron (HT250/HT300)?

The core differences between fixed plates made of ordinary cast iron and high-quality gray cast iron (such as HT250/HT300) lie in material properties, precision life, and applicable scenarios.

The material properties are fundamentally different. Ordinary cast iron has relatively loose composition and process control, uneven structure, and average strength, wear resistance, and stability. HT250/HT300 is a high-quality gray cast iron that has undergone strict proportioning and treatment, with higher tensile strength (the number after "HT" represents the minimum tensile strength MPa value) and hardness. Its internal structure is uniform and dense, with better wear resistance and better resistance to deformation and wear.

This directly leads to differences in accuracy, lifespan, and stability. High quality gray cast iron fixed plate has low residual stress and excellent long-term stability after artificial aging treatment, which can maintain initial accuracy for a long time. Ordinary cast iron fixed plates are prone to gradually lose accuracy due to stress release or external forces, resulting in a rapid decline in accuracy. Therefore, high-quality gray cast iron fixed plates must be selected for key workstations that require high-precision detection and frequent use.

Ultimately determine its applicable scenarios and value. Ordinary cast iron fixed plates can be used in situations with low requirements, light loads, or temporary needs. The HT250/HT300 fixed plate is a reliable choice for production lines that require precision inspection, heavy-duty processing, and long-term use. Although the procurement cost is high, its long lifespan and stable precision guarantee bring better long-term investment returns. When making a choice, priority should be given to the material report provided by the manufacturer rather than relying solely on price judgment.