SUS 440C Steel
Products Description Chemical Composition Mechanical Properties Physical Properties In terms of hardness, SUS 440C steel has a relatively high Rockwell hardness, which makes it suitable for applications where durability and resistance to abrasion are crucial. This hardness property enables it to...
Description
Products Description
Chemical Composition
| Standard | Grade | C | Mn | P | S | Si | Cr | Mo |
| ASTM A276 | S44004/440C | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | ≦0.75 |
| EN10088 | X105CrMo17/1.4125 | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | 0.40-0.80 |
| JIS G4303 | SUS 440C | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | ≦0.75 |
Mechanical Properties
| Tempering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Rockwell (HRC) | Impact Charpy V (J) |
| Annealed* | 758 | 448 | 14 | 269HB max# | – |
| 204 | 2030 | 1900 | 4 | 59 | 9 |
| 260 | 1960 | 1830 | 4 | 57 | 9 |
| 316 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (mm/m/°C) | Thermal Conductivity(W/m.K) | Specific Heat | Electrical Resistivity (nW.m) | |||
| 0-100°C | 0-200°C | 0-600°C | at 100°C | at 500°C | 0-100°C (J/kg.K) | ||||
| 440 C | 7650 | 200 | 10.1 | 10.3 | 11.7 | 24.2 | – | 460 | 600 |
In terms of hardness, SUS 440C steel has a relatively high Rockwell hardness, which makes it suitable for applications where durability and resistance to abrasion are crucial. This hardness property enables it to withstand heavy use and maintain its integrity over time.
Regarding wear resistance, it outperforms many other types of steels. It can resist the wear and tear caused by friction and mechanical stress, making it an ideal choice for components that are subject to repetitive motion or contact. This characteristic is especially valuable in machinery parts, such as bearings and gears, where minimizing wear is essential for efficient operation and long service life.
Corrosion resistance is another significant advantage of SUS 440C steel. It can resist the corrosive effects of various environments, including moisture, chemicals, and some acidic substances. This property makes it suitable for use in applications where exposure to harsh conditions is common, such as in the marine industry or in chemical processing plants.
The manufacturing process of SUS 440C steel involves careful alloying and heat treatment to achieve the desired properties. The precise composition and treatment ensure that the steel has the right balance of strength, hardness, and toughness.
In addition to its mechanical properties, SUS 440C steel also has good machinability. It can be relatively easily shaped and processed into different forms and sizes, allowing for the production of complex components with high precision.
Overall, SUS 440C steel is a versatile and reliable material that offers a combination of desirable properties. Its hardness, wear resistance, and corrosion resistance make it a preferred choice in many engineering and manufacturing applications, contributing to the performance and durability of various products and equipment. Whether it's used in the production of cutting tools, surgical instruments, or high-performance mechanical components, SUS 440C steel continues to prove its value and significance in the industrial world.
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