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NACE MR 0103/0175 HIC boiler sheets and plates are specially designed steel materials that excel in resisting hydrogen-induced cracking (HIC) and sulfide stress corrosion cracking (SSC) in challenging sour oil and gas environments. These plates meet the rigorous NACE standards for materials used in high-pressure boilers and pressure vessels that are exposed to hydrogen sulfide (H₂S). Built for long-lasting durability and safety, these steels provide outstanding resistance to cracking while also maintaining impressive mechanical strength and toughness. They find extensive application in the oil and gas, petrochemical, and refining industries, where reliable performance is a must in harsh conditions.
The chemical makeup of NACE MR 0103/0175 boiler sheets and plates generally features low carbon content, along with controlled amounts of manganese, phosphorus, sulfur, and alloying elements like chromium and molybdenum, all aimed at enhancing corrosion resistance and mechanical properties. Typically, these steels boast a tensile strength ranging from 450 to 620 MPa and a minimum yield strength of 275 MPa. Their microstructure and toughness are fine-tuned to prevent HIC and SSC, with strict quality controls ensuring cleanliness of inclusions and hardness levels. These characteristics make the material well-suited for various fabrication processes, including welding, forming, and heat treatment.
Grade : ASME SA 516 GR.70N 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 |
| 0.18 | 0.4 | 0.95/1.50 | 0.015 | 0.008 | 0.02 (Min) | 0.3 | 0.3 | 0.3 | 0.08 | 0.01 | 0.03 | 0.02 |
| Tensile strength (ksi) | Yield strength (ksi) | Elongation min, % 200 mm (8 in) | Elongation min, % 50 mm (2 in) |
| 485-620 (70-90) | 260 (38) | 17 | 21 |
| British Standard | European Norm | ASTM/ASME | DIN |
| BS1501-224-490A/B | EN10028 P355GH | A/SA516 – Grade 70 | – |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
NACE MR 0103/0175 HIC Boiler Sheets and Plates offer exceptional resistance to hydrogen-induced cracking (HIC), making them ideal for high-sulfur environments. They provide superior corrosion resistance, especially in acidic and sulfide-rich conditions, ensuring long-term durability and reliability. These materials also exhibit excellent mechanical properties, such as high tensile strength and toughness, making them suitable for demanding applications in oil and gas, chemical processing, and power generation industries. Their resistance to stress corrosion cracking ensures enhanced performance and longevity in harsh environments.
NACE MR 0103/0175 HIC boiler sheets and plates are widely utilized in the production of pressure vessels, heat exchangers, and piping systems that operate in sour gas service. Their ability to resist hydrogen embrittlement and sulfide stress corrosion cracking is vital for maintaining the integrity and safety of equipment in oil refineries, gas processing plants, and offshore platforms. By preventing premature failures in aggressive environments, these steels help minimize downtime and maintenance costs. Their well-balanced strength and toughness make them a reliable choice for demanding applications.
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