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Nial Sheets and Plates is a reputable manufacturer and supplier of high-quality Stainless Steel 440C Circles based in Houston, USA. We cater to industries that require exceptional hardness, wear resistance, and precision. Our Stainless Steel 440C Circles are meticulously engineered for applications where strength and a flawless surface finish are crucial. With our commitment to strict quality control, advanced processing techniques, and prompt delivery, we proudly support customers in the aerospace, automotive, tooling, and industrial sectors. Our Stainless Steel 440C Circles are designed to deliver reliable performance for critical components that need to withstand high stress and resist wear and corrosion.
Stainless Steel 440C Circles are high-carbon martensitic stainless steels, featuring approximately 16–18% chromium and 0.95–1.20% carbon, along with trace amounts of manganese and silicon. This unique composition allows them to achieve remarkable hardness and wear resistance after heat treatment. Their mechanical properties include a tensile strength of about 760–830 MPa, a yield strength close to 450 MPa, and a Rockwell hardness rating of up to 58 HRC. While they boast impressive hardness, they also offer moderate corrosion resistance, making them perfect for parts that face wear, impact, and mild corrosive conditions.
| 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 Stainless Steel 440C Circles find extensive use in applications that demand outstanding hardness, wear resistance, and dimensional stability. They are commonly utilized in precision bearings, valve components, and ball bearings within the automotive and aerospace industries. Tooling sectors rely on them for cutting tools, dies, and knives that require a sharp edge and long-lasting durability. Additionally, they are well-suited for surgical instruments and high-strength mechanical parts that encounter friction and moderate corrosion. In the oil and gas industry, they are employed in pump components and shafts. Their exceptional hardness and polishability make Stainless Steel 440C Circles the go-to choice for applications needing precise, wear-resistant parts.
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Houston, TX 77041
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