H13 and SKD61 are two of the most commonly used hot work mold steels in the manufacturing industry. They are both suitable for high-temperature and high-pressure working environments, but there are obvious differences in chemical composition, mechanical properties and application scenarios. Many purchasers are confused about how to choose between them—this article will compare H13 and SKD61 in detail to help you make the right choice for your mold production.
Chemical Composition Comparison: H13 vs SKD61
The difference in chemical composition is the fundamental reason for the different properties of H13 and SKD61. The following table shows the detailed composition comparison (mass fraction):
| Element | H13 Tool Steel | SKD61 Tool Steel | Key Difference |
| C (Carbon) | 0.32-0.45% | 0.38-0.45% | SKD61 has higher carbon content, better hardness |
| Cr (Chromium) | 4.75-5.50% | 4.50-5.50% | Similar, both have good corrosion resistance |
| Mo (Molybdenum) | 1.10-1.75% | 1.00-1.50% | H13 has higher molybdenum content, better high-temperature strength |
| V (Vanadium) | 0.80-1.20% | 0.80-1.20% | Same, both have good wear resistance |
Mechanical Properties Comparison
The difference in chemical composition leads to different mechanical properties of H13 and SKD61, which directly affects their application scenarios:
- Hardness: After heat treatment, the hardness of H13 is 42-48 HRC, while SKD61 can reach 45-50 HRC. SKD61 has higher hardness and better wear resistance.
- Toughness: H13 has better toughness than SKD61, which is not easy to crack under impact load. This makes H13 more suitable for molds that need to bear large impact.
- High-temperature Resistance: H13 has better high-temperature strength and thermal fatigue resistance, which can work stably at 550-600℃; SKD61 is suitable for working environments below 550℃.
- Machinability: Both have good machinability, but H13 is easier to process due to its lower carbon content, which can reduce processing time and costs.
Application Scenarios: Which One to Choose?
Based on the above comparisons, H13 and SKD61 are suitable for different application scenarios. You can choose according to your specific mold type and working conditions:
H13 Tool Steel Application
H13 is mainly used for hot work molds that need to bear high temperature, high pressure and impact load, such as:
- Aluminum alloy, zinc alloy die casting molds (such as automotive engine parts, hardware die casting molds)
- Hot forging molds (such as forging molds for gears, shafts)
- Extrusion molds for non-ferrous metals
H13 is the first choice for die casting molds because of its good toughness and high-temperature resistance, which can effectively avoid mold cracking caused by impact and high temperature.
SKD61 Tool Steel Application
SKD61 is suitable for hot work molds with high wear resistance requirements and low impact load, such as:
- High-temperature forging molds (such as forging molds for small parts)
- Die casting molds for small and medium-sized parts (such as electronic product shell die casting molds)
- Hot extrusion molds for plastics and rubber
SKD61 is more suitable for molds that require high wear resistance, as its higher hardness can extend the service life of the mold.
Cost & Cost-Effectiveness Analysis
In terms of price, the price of SKD61 is slightly higher than that of H13 (about 10-15% higher), because SKD61 has higher carbon content and better wear resistance. If your mold requires high wear resistance and low impact load, SKD61 is more cost-effective; if your mold needs to bear high impact and high temperature, H13 is a more cost-effective choice.
If you are still unsure which hot work mold steel to choose for your die casting or forging molds, our professional engineer team can provide you with free consultation. H13 tool steel and SKD61 tool steel provided by us are all ISO certified, with complete material certificates and free custom processing services. Contact us now to get a free quote!