440C stainless steel flat bar is a high-quality stainless steel product known for its exceptional combination of wear resistance and corrosion resistance. It belongs to the martensitic stainless steel family and is widely used in various industries for its superior performance.
Standard of 440C Stainless Steel and Equivalent Steel Grades
| Country | USA | BS & DIN | Japan |
| Standard | ASTM A276 | EN 10088 | JIS G4303 |
| Grades | S44004/440C | X105CrMo17/1.4125 | SUS440C |
ASTM A276 440C Steel Chemical Composition and Equivalent’s
| 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 |
440C Stainless Steel 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 |
| 306 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
Here are some key points to introduce 440C stainless steel flat bar:
1. Composition: 440C stainless steel flat bar is primarily composed of chromium (16-18%), carbon (0.95-1.20%), and small amounts of other elements like manganese, silicon, and molybdenum.
2. Wear Resistance: 440C stainless steel flat bar is renowned for its outstanding wear resistance, making it suitable for applications involving abrasive materials, cutting tools, bearings, and wear-resistant components.
3. Corrosion Resistance: Despite being a high-carbon stainless steel, 440C exhibits good corrosion resistance.
4. Hardness and Strength: 440C stainless steel flat bar has excellent hardness and high strength, providing durability and longevity in demanding applications.
Post time: Jul-05-2023