Thabiso Steel stands out as a reliable supplier and manufacturer of top-notch pressure vessel and boiler-quality plates, proudly based in Cape Town, South Africa. One of their standout products is the SA 516 GR.65N Plates, which meet the rigorous NACE MR0103 and MR0175 standards, making them perfect for sour service and critical pressure applications. These plates find their place in various industries, including oil and gas, petrochemical, power generation, and offshore engineering. With a strong commitment to quality assurance, timely delivery, and technical know-how, Thabiso Steel guarantees that its SA 516 GR.65N NACE plates adhere to strict global specifications for strength and corrosion resistance, even in the toughest environments.
SA 516 GR.65N is a carbon steel plate grade designed primarily for moderate to lower-temperature service in pressure vessels. It features a carbon content of 0.18–0.26%, along with manganese (0.85–1.20%), silicon, phosphorus, and sulfur, all kept within controlled limits. When the steel is normalized (indicated by “N”), it gains enhanced notch toughness. Plates that are certified to NACE MR0103 and MR0175 are specifically engineered to resist sulfide stress cracking (SSC), which is crucial in sour gas environments. These specifications ensure that the material is well-suited for areas with H₂S exposure. The mechanical properties include a minimum yield strength of 240 MPa and tensile strength that ranges from 450–600 MPa, depending on the thickness.
| Grade | ASME SA 516 GR.65N Boiler and Pressure Vessel Steel Plates |
|---|---|
| Width | 1000mm-4500mm |
| Thickness | 5mm-150mm |
| Length | 3000mm-18000mm |
| Supply Condition | As Rolled, Normalized Rolling, Furnace Normalizing, Vacuum Degassing, Simulated Post-Weld Heat Treatment or as per customer requirement. |
| Impact tested | 52° C |
| Tempering | Notch toughness can be improved by quenched cooling from hot rolling or normalizing by the supplier. If such a faster cooling rate is agreed upon between purchaser and supplier then the steel is also to be tempered at 1200 F. |
| Applications | Used for weld fabrication of pressure vessels that require improved notch toughness for lower than ambient temperature service. |
| Process of Manufacturing | Hot-Rolled (HR) |
| C | Si | Mn | P | S | Al | Cr | Cu | Ni | Mo | Nb | Ti | V |
| 0.08/0.20 | 0.4 | 0.9/1.5 | 0.03 | 0.03 | 0.02 | 0.3 | 0.3 | 0.3 | 0.08 | 0.01 | 0.03 | 0.02 |
| Tensile strength (ksi) | Tensile strength (MPa) | Yield strength (ksi) | Yield strength (MPa) | Elongation in 200mm (min)(%) | Elongation in 50mm (min) (%) |
| 65-85 | 450-585 | 35 | 240 | 19 | 23 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| British Standard | European Norm | ASTM/ASME | DIN |
| BS1501-224-460A/B | EN10028 P295GH | A/SA516 – Grade 65 | DIN 17155 17 MN 4 |
SA 516 GR.65N NACE and MR0103/0175 plates are commonly utilized in pressure vessels, heat exchangers, storage tanks, and piping systems that are designed for sour gas service. These plates are vital in settings where exposure to hydrogen sulfide (H₂S) could lead to cracking or corrosion, such as offshore platforms, refineries, and chemical processing plants. Their ability to perform reliably under pressure and in corrosive conditions makes them a go-to choice for engineers and project managers who need compliant materials for their projects.
SA 516 GR.65N NACE and MR 0103-0175 Plates are employed in the production of pressure vessels, boilers, heat exchangers, and storage tanks, providing long-lasting performance in sour service conditions. The plates exhibit superior resistance to hydrogen-induced cracking, which makes them suitable for applications in oil and gas, petrochemical, chemical processing, and power generation industries. Their high corrosion and strength resistance allow for safe operation in tough conditions, guaranteeing reliability for refineries, offshore platforms, and industrial plants processing high-pressure and corrosive materials.
ThabisoSteel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Cape Town, South Africa.
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