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Giriş
H13 steel, also know as 4Cr5MoSiV1, is a kind of hot work die steel which belongs to tungsten-molybdenum heat-resistant steel.
It is a kind of alloy tool steel with low content of carbon,and content chromium, molybdenum, silicon and vanadium. H13 steel has good strength and toughness at high temperature,and also has excellent thermal fatigue resistance, thermal cracking resistance, thermal stability and wear resistance. Due to these features H13 steel is widely used in ho working industry.
Cr12 steel is a kind of widely used cold working steel with high carbon,high chromium ledeburite. It has good harden ability,wear resistance,and hot work ability, and the carbides are well distributed in steel, therefore it can be used to manufacture kinds of cold working mold with complex shapes and heavy working conditions.
H13 and Cr12 Steel: Chemical Composition
H13 Steel
| C | Si | Mn | P | S | Cr | Mo | V |
| 0.32～0.45% | 0.8～1.2% | 0.20～0.50% | ≤0.030% | ≤0.030% | 4.75～5.50% | 1.10～1.75% | 0.80～1.20% |
Cr12 Steel
| C | Si | Mn | S | P | Cr | Ni | Cu |
| 2.00～2.30% | ≤0.40% | ≤0.40% | ≤0.030% | ≤0.030% | 11.50～13.00% | ≤0.25% | ≤0.30% |
Comparison between H13 and Cr12 Steel
H13 has good heat resistance, excellent strength and hardness, high wear resistance and toughness, excellent comprehensive mechanical properties and high tempering resistance stability. Cr12 steel has good hardenability, wear resistance and hot working properties, but due to its high carbon content, it has poor impact toughness and is prone to cracking. H13 steel is more suitable for hot working molds, such as die casting molds and hot extrusion molds, due to its excellent thermal stability and wear resistance, especially in situations where high wear resistance is required. The main differences between them are heat treatment process, hardness and application areas.
The Application of H13 and Cr12 Steel
H13 steel is suitable for manufacturing forging molds,hot extrusion molds,and precision forging molds with large impact loads, die casting molds of aluminum,copper and their alloys. It is also suitable for injection molds, hot shears, hot stamping tools, hot forming tools,and heat treatment fixtures, etc. H13 steel has good performance in high temperature working environment, is one of the indispensable material in hot working molds manufacturing.
Cr12 steel is suitable for the manufacture of cold stamping dies, punches, cold shears, drill bushings, gauges, wire drawing dies, thread rolling plates, wire drawing dies and thread rolling dies, etc., which have small impact loads but high abrasion resistance requirements.
The high carbon and chromium content of Cr12 steel results in extremely high wear resistance and is suitable for a wide range of cold work molds, especially those requiring high wear resistance.
H13 and Cr12 Steel: Which should I use?
Here are some critical factors below to compare when choosing H13 and Cr12 Steel:
- Application and working environment:
H13 steel: Suitable for hot working molds, such as die casting molds, hot extrusion molds, hot forging molds etc., which can maintain its performance at high temperature.
Cr12 steel: Suitable for cold working molds, such as stamping molds, shearing tools, cold extrusion dies, etc., mainly used for processing at room temperature.
- Chemical Composition:
H13 steel: Contains alloy elements such as chromium, molybdenum, silicon and vanadium, which provide good hot strength and wear resistance.
Cr12 steel: High carbon and high chromium steel grades, contains high carbon and high chromium, which provide excellent hardness and wear resistance.
- Heat treatment and hardness:
H13 steel: Hardness generally at 48-52HRC after heat treatment,with good heat treatment stability and secondly harden ability.
Cr12 steel: Hardness generally at 58-62HRC after heat treatment,providing higher hardness,but easy to crack during heat treatment.
- Wear resistance and impact resistance:
H13 steel: Has good wear resistance and hot fatigue resistance,suitable for bearing high temperature abrasion and hot impact.
Cr12 steel: Although it has extremely high wear resistance,but toughness is relatively poor,do not suitable for bearing large impact loads.
- Toughness and plasticity:
H13 steel: It has good toughness and plasticity because it contains molybdenum and silicon,and it can bear the impact load in a way.
Cr12 steel: Its high carbon content leads to the poor toughness,and easy to crack during impact.
- Process ability and cost:
H13 steel: Has good process ability,but cost is relatively high,and need professional heat treatment technology.
Cr12 steel: Cost is lower,but process and heat treatment are difficult and need to strict control of process parameters.
- Corrosion resistance:
H13 steel: It contains chromium,and has a certain degree of corrosion resistance.
Cr12 steel: Due to its high chromium,Cr12 has better corrosion resistance properties.
- Dimension stability:
H13 steel: Has good dimension stability at high temperature,and suitable for long-term using in high temperature environment.
Cr12 steel: Has good dimension stability at room temperature,but the dimension could be changed at high temperature.
Sonuç
Taking the above factors into consideration, you can choose suitable steel according to the specific application requirement, cost budget, and process ability. H13 steel is more suitable for high temperature working environment, however Cr12 steel is suitable for high resistance application at room temperature.
SSS
H13 and Cr12 Steel: which one has better wear resistance?
Compare to H13, Cr12 has extremely high wear resistance due to its high carbon and high chromium, suitable for kinds of cold working molds.
H13 and Cr12 Steel: which one has better corrosion resistance?
H13 steel has moderate corrosion resistance, and harsh corrosive agents will influence the properties of tolls or molds made from H13 steel. However,Cr12 steel has better corrosion resistance due to its high content of chromium.
H13 and Cr12 Steel: which is more economical?
The high durability and long service life of H13 steel make it has good economical efficient in long term operation.especially in high temperature and high load application. Cr12 steel has good cost effective due to the high wear resistance,but it need frequent replacement in application of bearing high temperature or impact load, which may affect its economic benefits.
