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Kunj Sheets and Plates stands out as a top manufacturer and supplier of **Stainless Steel 440C Circles** in Chennai, India. Known for their impressive hardness and outstanding wear resistance, our SS 440C circles are made from high-carbon martensitic stainless steel. These circles are perfect for high-performance applications that require a blend of strength, corrosion resistance, and edge retention. Stainless Steel 440C is a popular choice for precision components and cutting tools. At Kunj, we provide customized dimensions, smooth surface finishes, and rigorous quality control to guarantee exceptional product performance. Our SS 440C circles are trusted across various industries for their durability and precision engineering.
Stainless Steel 440C Circles** consist of about 16–18% chromium and 0.95–1.20% carbon, along with trace amounts of manganese, molybdenum, and silicon. This high-carbon martensitic grade can be heat treated to achieve remarkable hardness—typically reaching 58–60 HRC. It boasts a tensile strength of 760–980 MPa and excellent resistance to wear, abrasion, and mild corrosion in hardened conditions. While it may have slightly lower corrosion resistance compared to austenitic grades, SS 440C delivers unmatched strength and durability, making it an ideal choice for components that require precise machining and high wear performance.
| Specifications : | ASTM A276 |
| Dimensions : | ASTM, ASME and API |
| Standard : | JIS, AISI, ASTM, GB, DIN, EN, etc. |
| Surface : | 2B, 2D, BA, NO.4, NO.8, 8K, Mirror,Checkered, Embossed, Hair Line, Sand Blast, Brush, Etching |
| Width : | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm,etc. |
| Finish : | Black,Bright Polished,Rough Turned,No.4 Finish,Matt Finish,BA Finish |
| Length : | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc. |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 440C | min. max. | 0.95 1.20 | – 1 | – 1 | – 0.04 | – 0.030 | 16.00 18.00 | – 0.75 | – | – |
| Tempering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Rockwell (HR C) | 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 |
| Grade | WERKSTOFF NR. | UNS |
| SS 440C | 1.4313 | S44004 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Stainless Steel 440C Circles find extensive use in industries where hardness, wear resistance, and precision are paramount. In the tool and die sector, they are utilized to create bearings, cutting tools, and valve components. The automotive and aerospace industries rely on SS 440C circles for high-strength mechanical parts and shafts. They are also employed in surgical instruments, ball bearings, and industrial knives due to their excellent edge retention. Furthermore, SS 440C circles are suitable for mechanical seals, pump components, and high-load structural elements, where both strength and dimensional accuracy are crucial under demanding working conditions.
Stainless Steel 440C Circle is a high carbon, high chromium steel known for its durability, corrosion resistance and durability. It is commonly used in products requiring precision and durability such as circular bearings, valve parts, and cutting tools. Excellent corrosion resistance in corrosive environments makes it suitable for aerospace, automotive and marine industries. In addition, it is used in surgical instruments, gears and shafts where high mechanical strength and wear resistance are required and the material is also used in heat treatment applications for parts requiring high hardness.
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