The difference between HT-250 and HT-300

The difference between HT250 and HT300 gray cast iron

HT250 and HT300 belong to pearlite gray cast iron, which are two types of cast iron materials used in mechanical equipment, machine tools, and hydraulic equipment. They are distinguished by their ZUIDI tensile strength and have significant differences in mechanical properties, processability, cost, and applicable scenarios.

In terms of core performance, HT250 has a tensile strength of ≥ 250MPa, a hardness of HB170-241, and moderate bending and compression resistance; HT300 has a tensile strength of ≥ 300MPa, a hardness of HB190-260, and superior bending, compression, and rigidity. It belongs to GAOQINAGDU impregnated cast iron.

The HT300 matrix structure is denser, NAIMOXING、 The pressure resistance and deformation resistance are significantly higher than HT250, making it suitable for heavy load, high voltage, and GAOJINGDU working conditions.

In terms of process and cost, HT250 casting has good fluidity, small shrinkage, few defects, no need for complex inoculation treatment, easy processing, and high cost; HT300 requires strict incubation and composition control, with a high tendency towards white casting and difficulty in casting, which can easily lead to shrinkage cracks,

BIXU has been manually stabilized in terms of size, production cycle, and cost.

Each has its own focus on usage: HT250 is used for components with medium loads and good shock absorption requirements, such as ordinary machine tool beds, workbenches, intermediate cylinder bodies, pump bodies, valve bodies, marking plates, pulleys, etc; HT300 is used in high load, high voltage, and high NAIMO scenarios,

Such as heavy-duty machine tool guide rails, spindle boxes, large press machine bodies, high-pressure hydraulic cylinders, JINGMI measuring tools, high-speed transmission components, engine cylinder liners, etc.

Overall, HT250 is a balanced universal material, XINGJIABIGAO， Meet the needs of most conventional equipment; HT300 is GAOQIANGDU heavy-duty ZHUANYONG material, with GENGQIANG performance and GENGGAO cost, used for key core components. Selection based on load, accuracy, pressure, and

Based on the budget, HT250 is selected for ordinary working conditions, and HT300 is selected for heavy-duty JINGMI working conditions.