H10 Tool Steel / DIN 1.2365 / GB 4Cr3Mo3SiV

With its formidable resistance to high temperatures and fatigue, H10 tool steel excels in numerous high-temperature forming applications:

Die-casting moulds: The material of choice for core components (such as cores, cavities, slides, nozzles, etc.) in aluminium, magnesium, and zinc alloy die-casting moulds. Withstanding the erosion of molten metal and extreme pressures, H10 is pivotal for ensuring high-volume, consistent die-casting production.

Hot Extrusion Dies: For dies producing extruded profiles and tubes from aluminium, copper and other non-ferrous metals (including die pads, extrusion cylinder liners, billet holders, etc.), H10’s stability is crucial under combined high-temperature and high-pressure conditions.

Hot forging dies: For manufacturing die inserts and punches subjected to medium-to-high impact forces, H10 excels particularly in forging applications demanding high wear resistance and thermal fatigue resistance.

Plastic moulds: Suitable for components requiring high-temperature operation (e.g., high-temperature engineering plastics, glass-fibre reinforced plastics) or demanding high wear resistance and extended service life.

Our advantages in Processing H10 Tool Steel

Transforming a billet of H10 steel into a reliable mould capable of sustained production demands meticulous craftsmanship and rigorous quality control throughout:

Select Raw Materials and Pure Smelting: Utilising high-quality raw materials and advanced smelting techniques (such as Electro-Slag Remelting (ESR) or Vacuum Arc Remelting (VAR)), significantly reduces harmful impurities like sulphur and phosphorus, along with non-metallic inclusions. This forms the foundation for ensuring high material purity, uniformity, and superior toughness.

Precision Forging and Rolling: Strictly controlled forging or rolling processes thoroughly break down the cast structure, refine grain size, and eliminate internal defects. This ensures excellent density and uniformity at both macro and micro levels, laying the groundwork for subsequent heat treatment.

Scientific and Rigorous Heat Treatment: Heat treatment is the pivotal step in unlocking H10’s potential. Precisely controlled quenching temperatures, durations, and cooling rates, coupled with subsequent meticulous tempering processes (temperature, duration, and number of cycles), collectively determine the steel’s final hardness, strength, toughness, and most critically, its thermal fatigue resistance profile. Process parameters for each furnace batch undergo stringent validation.

Comprehensive Non-Destructive Testing and Quality Control: From ingot to finished product, critical stages undergo non-destructive testing such as ultrasonic inspection to ensure freedom from internal defects like cracks or shrinkage cavities. Concurrently, each batch undergoes rigorous chemical composition analysis, hardness testing, metallographic examination, and essential mechanical property assessments (e.g., high-temperature tensile tests, impact toughness), guaranteeing performance fully meets or exceeds standard requirements.

Traceability and Consistency Management: A comprehensive material traceability system is established, recording complete production data from furnace batch numbers to final product batches. Through standardised processes and rigorous Statistical Process Control (SPC), high consistency and stability of performance across different batches are ensured, providing customers with confidence in usage.