High Toughness Hot Work H13 Mold Steel (Electroslag Remelting Type)

H13 (national standard grade 4Cr5MoSiV1) is an internationally common high-toughness, high-wear-resistance hot work mold steel. Our products are smelted using the electroslag remelting (ESR) process. Compared with ordinary smelting products, the steel has higher purity, more uniform structure, excellent high-temperature performance, thermal fatigue crack resistance and hardenability. It is a benchmark material in the current hot work mold field.

• Core Functions: Maintain stable hardness, strength and wear resistance under high temperature, high pressure, and repeated cold-hot alternating conditions, effectively suppress mold thermal cracking, collapse, wear and other failure problems, and significantly extend mold service life.
• Main Application Scenarios:
  1. Die-casting molds for non-ferrous metals such as aluminum alloy, zinc alloy, magnesium alloy (such as automobile wheels, home appliance shell die-casting molds);
  2. Hot forging and hot extrusion molds (such as automobile parts hot forging molds, steel pipe extrusion molds);
  3. High-life plastic molds (such as high-polish transparent parts, engineering plastic injection molds);
  4. Other high-temperature working condition tools: hot shear knives, die-casting punches, high-temperature wear-resistant parts, etc.

• Product Core Advantages

  1. Electroslag Remelting High Purity: Using electroslag remelting smelting process, the content of harmful impurities such as sulfur and phosphorus in steel is extremely low, non-metallic inclusions are fewer, and the uniformity of internal structure is greatly improved, reducing the risk of early cracking of the mold from the root.
  2. Superb Thermal Fatigue Resistance: Under repeated cold-hot impact conditions of die-casting and hot forging, it has extremely strong crack resistance, and the mold service life is more than 30% longer than ordinary smelting H13.
  3. Excellent Comprehensive Mechanical Properties: It has high hardness, high toughness and high strength, and can still maintain stable mechanical properties under high temperature (within 600℃), and is not prone to deformation or collapse.
  4. Excellent Processing and Polishing Performance: The steel has uniform hardness, good cutting performance, and can achieve extremely high mirror finish after polishing, meeting the processing requirements of high-demand plastic molds and high-gloss die-casting molds.
  5. Stable Heat Treatment Performance: Strong hardenability, small quenching deformation, wide heat treatment process window, adaptable to different customers' heat treatment processes, greatly reducing the scrap rate in the processing process.

• Conventional Usage Method

  1. Pre-processing: According to the mold drawing, perform rough and finish machining such as turning, milling, and grinding on the H13 steel billet, leaving machining allowance for heat treatment;
  2. Heat Treatment Specification: Recommended quenching temperature 1020-1050℃, oil cooling or air cooling; tempering temperature 560-600℃, tempering 2-3 times, each time holding for more than 2 hours, the final hardness can be stably reached HRC 44-52 (adjustable according to working condition requirements);
  3. Subsequent Processing: After heat treatment, perform finish machining, polishing, surface nitriding and other treatments, and finally assemble into the mold for use;
  4. Usage and Maintenance: During mold use, perform regular stress-relief tempering maintenance, which can further extend service life.