DIN 1.2083 ESR steel, AISI 420 tool steel, Stavax ESR steel, M310, and X40Cr14 ESR steel are different types of martensitic stainless steels commonly used in tooling, dies, and similar applications due to their combination of hardness, corrosion resistance, and wear resistance.
Here is an overview of their chemical compositions, properties, and applications:
1. DIN 1.2083 ESR (AISI 420 ESR, Stavax ESR steel, M310, and X40Cr14 ESR)
Chemical Composition (approximate):
- Carbon (C): 0.38–0.45%
- Chromium (Cr): 12–14%
- Manganese (Mn): 0.50–1.00%
- Silicon (Si): 0.30–1.00%
- Nickel (Ni): ≤ 0.50%
- Phosphorus (P): ≤ 0.030%
- Sulfur (S): ≤ 0.030%
Properties:
- Hardness: Can achieve hardness in the range of 50–55 HRC after heat treatment.
- Corrosion Resistance: Moderate due to the chromium content, though not as high as other stainless steels with higher chromium content.
- Wear Resistance: Good due to its martensitic structure and hardness.
- Toughness: Moderate toughness, which can be increased slightly by tempering.
Applications:
- Molds: Used for injection molds for plastics and in applications where wear and corrosion resistance are required.
- Die-Cutting Tools: Commonly used for producing parts in industries such as automotive and electronics.
- Medical Tools: Can be used in the manufacture of surgical tools and other equipment that require corrosion resistance and hardness.
2. AISI 420 Tool Steel
Chemical Composition (approximate):
- Carbon (C): 0.15–0.40%
- Chromium (Cr): 12–14%
- Manganese (Mn): 0.60–1.00%
- Silicon (Si): 0.10–0.50%
- Phosphorus (P): ≤ 0.04%
- Sulfur (S): ≤ 0.03%
Properties:
- Hardness: Can achieve hardness up to 55 HRC.
- Corrosion Resistance: Moderate to good resistance to corrosion, thanks to the chromium content.
- Toughness: Moderate, with higher toughness at lower hardness.
- Wear Resistance: Moderate, but it is highly resistant to abrasive wear.
Applications:
- Cutting Tools: AISI 420 is often used in tools where corrosion resistance is needed, such as in food processing, medical, and surgical tools.
- Valves and Pumps: Components that require both wear resistance and corrosion resistance.
- Cutting Dies: Used for making dies for cutting operations due to its hardness.
3. Stavax ESR Steel
Chemical Composition (approximate):
- Carbon (C): 0.30%
- Chromium (Cr): 12–14%
- Manganese (Mn): 0.50–1.00%
- Silicon (Si): 0.30%
- Nickel (Ni): ≤ 0.50%
- Molybdenum (Mo): 0.70%
Properties:
- Hardness: Can achieve hardness of 50–55 HRC after heat treatment.
- Corrosion Resistance: Excellent resistance to corrosion, particularly in humid or aggressive environments.
- Wear Resistance: Good wear resistance due to high hardness.
- Machinability: Good machinability, even in hardened conditions, thanks to the ESR (Electro-Slag Remelting) process that improves the material's internal structure.
Applications:
- Injection Molding Tools: Especially in the automotive and medical industries, where corrosion resistance is essential.
- Mold Cavities: Used for plastic injection molding where both high wear resistance and corrosion resistance are required.
- Diecasting Tools: In industries that need to produce high-quality, durable casting tools.
4. M310 Steel
Chemical Composition (approximate):
- Carbon (C): 0.30%
- Chromium (Cr): 13.00–15.00%
- Manganese (Mn): 0.30–0.60%
- Silicon (Si): 0.40–0.60%
- Molybdenum (Mo): 0.70%
Properties:
- Hardness: Hardness up to 50–55 HRC after heat treatment.
- Corrosion Resistance: Excellent, making it ideal for harsh environments.
- Wear Resistance: Good, but not as high as other steel grades like D2.
- Toughness: Fair to good toughness with adequate resistance to impact.
Applications:
- Corrosion-Resistant Molds: Primarily used in mold making where high corrosion resistance is necessary.
- High-End Tooling: For industries where tools need to withstand aggressive chemicals and high-temperature environments.
- Medical Equipment: Also used in the manufacture of tools for medical devices and equipment.
5. X40Cr14 ESR Steel
Chemical Composition (approximate):
- Carbon (C): 0.35–0.45%
- Chromium (Cr): 12–14%
- Manganese (Mn): 0.50–1.00%
- Silicon (Si): ≤ 1.00%
- Phosphorus (P): ≤ 0.03%
- Sulfur (S): ≤ 0.03%
Properties:
- Hardness: Achieves hardness up to 56 HRC after heat treatment.
- Corrosion Resistance: Fair to good resistance to corrosion in mild environments.
- Wear Resistance: Good wear resistance, suitable for moderate duty cutting and stamping tools.
- Machinability: It is machinable in the annealed condition, making it suitable for manufacturing processes that require shaping.
Applications:
- Die-Cutting Tools: Used for tools where high hardness and moderate corrosion resistance are needed.
- Plastic Molds: Used in the production of molds for plastic parts.
- Medical Tools: As with other martensitic stainless steels, it can be used in surgical tools and applications where cleanliness and corrosion resistance are essential.
Summary of Properties and Applications
| Grade | Hardness (HRC) | Corrosion Resistance | Wear Resistance | Toughness | Typical Applications |
|---|---|---|---|---|---|
| 1.2083 ESR | 50–55 | Moderate | Good | Moderate | Molds, die-cutting tools, medical tools |
| AISI 420 | Up to 55 | Moderate to Good | Moderate | Moderate | Cutting tools, surgical instruments, valves |
| Stavax ESR | 50–55 | Excellent | Good | Good | Injection molds, die-casting tools, mold cavities |
| M310 | 50–55 | Excellent | Good | Fair to Good | Corrosion-resistant molds, high-end tooling |
| X40Cr14 ESR | Up to 56 | Fair to Good | Good | Moderate | Die-cutting tools, plastic molds, medical tools |
These steels are versatile materials used in various industries for their combination of strength, corrosion resistance, and hardness. The choice of material depends on specific requirements like hardness, corrosion exposure, and wear resistance.
