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Operating out of Manila, Philippines, Diaz Sheetsandplates stands as a trusted partner for industries requiring uncompromising quality in high-temperature components. We specialize in providing Stainless Steel 309H sheets and plates, materials engineered to perform exceptionally under intense thermal stress. Our commitment is to supply products that not only meet but exceed the rigorous demands of critical applications, ensuring reliability and longevity for our clients’ most challenging projects. We believe in building lasting relationships through dependable service and superior materials.
The strength of Stainless Steel 309H lies in its specific composition, which includes higher levels of chromium and nickel for outstanding oxidation resistance. This is further enhanced by a controlled carbon content, giving it remarkable stability and creep strength at temperatures where other steels might falter. These plates are tough and durable, capable of maintaining their integrity in environments that would quickly degrade lesser materials, making them a solid, long-term investment for high-heat situations.
| Specifications | ASTM A240 / ASME SA240 |
| Size | 1/4″ to 4″ |
| Range | 5mm To 150mm |
| Thickness | 4mm-100mm |
| Width | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc |
| Length | 2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc |
| Surface | 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc |
| Finish | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated) |
| Form | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc. |
| Grade | C | Mn | Si | P | S | Cr | Ni | Fe | |
| SS 309 | 0.20 | 2 | 1 | 0.045 | 0.030 | 23 | 14 | 60 | |
| SS 309H | 0.04-0.10 | 2.0 | 0.75 | 0.045 | 0.03 | 22.0-24.0 | 15.0 | 58.0-63.0 | |
| Grade | Tensile Strengtd ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) max |
| 309/S | 75 | 30 | 40 | 95 |
| 309/H | 40 | 30 | 40 | 217 |
| STANDARD | WERKSTOFF NR. | UNS |
| SS 309H | 1.4833 | S30909 |
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 309H sheets and plates offer many advantages, including excellent resistance to high temperature oxidation and corrosion, making them ideal for harsh environments Due to the high carbon content they retain strength and staying power exist longer at high temperatures (up to 2000°F or 1093°C ). The material also boasts excellent resistance to heat fatigue, stress and cracking. Stainless steel 309H is highly weldable, ensuring ease of fabrication. It is also scratch resistant and can withstand acidic and basic environments. These properties make it suitable for industries such as aerospace, chemical processing and power generation.
You’ll commonly find Stainless Steel 309H sheets and plates hard at work in the heart of industrial settings. They are the preferred choice for constructing vital furnace parts like heat treatment baskets, radiant tubes, and industrial ovens. Their resilience also makes them ideal for critical components in the petrochemical industry, such as refinery heater tubes and boiler baffles, where their ability to withstand repeated thermal cycling prevents premature failure and ensures continuous, safe operation.
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