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Yunus Sheets and Plates, based in Istanbul, Turkey, is a reliable manufacturer and supplier of Stainless Steel 440C Circles. They pride themselves on delivering top-notch products that are designed for outstanding hardness, strength, and resistance to corrosion. Utilizing cutting-edge technology and rigorous quality control, these circles are built to perform reliably in tough industrial settings. Yunus Sheets and Plates guarantees precision, durability, and long-lasting reliability in every item they produce. Stainless Steel 440C Circles find their place in various sectors, including aerospace, automotive, tooling, and industrial machinery, where they provide excellent wear resistance, structural integrity, and high-performance capabilities, especially in situations where standard materials might not hold up.
These circles are made from high-carbon martensitic stainless steel, featuring about 16–18% chromium, 0.95–1.2% carbon, along with trace amounts of manganese, silicon, and molybdenum. This unique blend gives them remarkable hardness, wear resistance, and corrosion resistance. On the mechanical side, they boast a tensile strength ranging from 760 to 1000 MPa, high yield strength, and exceptional hardness post-heat treatment, while still maintaining moderate ductility. Additionally, Stainless Steel 440C Circles provide good fatigue resistance, dimensional stability, and machinability, making them ideal for applications that demand strength, toughness, and durability in high-stress and corrosive environments.
| 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 Circle offer several advantages including high hardness and good corrosion resistance, making them ideal for applications requiring toughness, such as bearings and cutting tools especially on sites flexible It has good corrosion resistance and can withstand higher temperatures than other stainless steels. The ability to retain strength and hardness at elevated temperatures makes it highly suitable in complex industrial applications. Moreover, it is easily polished, making it flexible for cosmetic and functional purposes in industries such as automotive, aerospace and space.
These circles are widely utilized in industries where high hardness, wear resistance, and corrosion resistance are crucial. In aerospace, they are used for precision components and structural parts. The automotive sector incorporates them into gears, shafts, and engine components that face significant stress. Tooling and industrial machinery sectors rely on them for cutting tools, bearings, and dies. Moreover, they are also found in medical instruments, valves, and high-performance equipment where durability and resistance to wear and corrosion are vital. Their combination of strength and resilience makes them a go-to choice in demanding applications.
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