7Cr17 is a martensitic stainless steel with high carbon and chromium contents, suitable for applications requiring high strength, hardness, and wear resistance. While it has good corrosion resistance, it is less resistant than austenitic stainless steels with higher chromium contents. Its hardness and wear resistance make it ideal for cutlery, blades, and tools.
7Cr17 Stainless Steel Data Sheet
7Cr17 is high carbon and high chromium martensitic stainless steel. The material is suitable for manufacturing high wear resistance. It is a high-load and corrosion-resistant plastic mold or as a kitchen and medical tool. The content of this steel is 0.7% C% and 17% Cr%.
With 7 Cr17 nine Cr18 similar material, 9 Cr18Mov, 11 Cr17 Cr14Mo4V, etc.
Hardness: Annealed ≤255HB; Quenching and tempering ≥54Hrc.
Chemical Composition:
| C | P | Cr | Ni | Mo |
|---|---|---|---|---|
| 0.60 ~ 0.75 | ≤0.035 | 16.00 ~ 18.00 | ≤0.60 | can be added ≤0.75 |
Supplementary Materials:
Contains 15% ~ 30% chromium. Its corrosion resistance, toughness, and weldability increase with the increase of chromium content, and the chloride stress corrosion resistance is better than other types of stainless steel, which belongs to this category Crl7, Cr17Mo2Ti, Cr25, Cr25Mo3Ti, Cr28, and so on. Because of its high chromium content, ferritic stainless steel has good corrosion resistance and oxidation resistance, but its mechanical properties and process properties are poor, and it is mostly used for acid-resistant structures with little force and for antioxidant steel.
This kind of steel can resist the corrosion of atmosphere, nitric acid, and brine solution, and has the characteristics of high-temperature oxidation resistance, low thermal expansion coefficient, etc., used in nitric acid and food factory equipment, and can also make parts that work at high temperatures, such as gas turbine parts.
Key Properties
- Corrosion Resistance: Provides good resistance to corrosion in mildly corrosive environments. However, it is less resistant compared to higher chromium stainless steels or austenitic stainless steels.
- Hardness and Strength: Due to its high carbon content, 7Cr17 can be hardened to a high degree, giving it good hardness and strength. It is commonly used in applications where high strength is needed.
- Wear Resistance: The high carbon content improves wear resistance, making it suitable for cutting tools and blades.
- Heat Treatment: Can be heat-treated to achieve different levels of hardness and strength.
Applications
7Cr17 is used in various applications where strength and hardness are important, including:
- Cutlery and Blades: Popular in knife blades and other cutting tools due to their hardness and edge retention.
- Tooling: Used in some tooling applications where resistance to wear and deformation is needed.
- Industrial Parts: Employed in components that require good mechanical properties and moderate corrosion resistance.
Comparison to Other Stainless Steels
- Compared to 304 Stainless Steel: 7Cr17 has higher carbon content, making it harder and more wear-resistant, but it has lower corrosion resistance compared to 304 stainless steel.
- Compared to 420 Stainless Steel: 7Cr17 and 420 stainless steel are both martensitic, but 7Cr17 typically has a higher chromium content and similar or slightly lower carbon content.