SA 285 Gr. C (ASTM A285 Grade C) is a carbon steel plate for pressure vessels, known for its good weldability, heat resistance, and suitability for low to intermediate pressure applications like boilers, tanks, and heaters.
Chemical Composition:
| C | Mn | P | S | Si | Cr | Cu | Ni | Mo | Nb | Ti |
| % | % | % | % | % | % | % | % | % | % | % |
| 0.16 | 0.40-1.20 | 0.03 | 0.03 | 0.35 | 0.30 | 0.30 | 0.30 | 0.08 | 0.01 | 0.03 |
Physical properties :
| Grade | Tensile strength, kis [MPa] | Yield strength, min, kis [MPa] | Elongation in under [50mm], min, % |
| SA285 Gr C | 380-515 | 205 | 27 |
EQUIVALENT GRADES:
| ASTM/ASME | ME British Standard | European Norm | Japan | Spain |
| A/SA285 - Grade C | 161 Gr.360/164 Gr.360 | P235GH | SPV 24 | A 37 RCI |
Applications
Pressure Vessels & Tanks:
Ideal for low- to medium-pressure tanks, storage tanks, and low-pressure vessels.
Boilers:
Used in the construction of stationary and hull boilers.
Heat Exchangers:
Suitable for exchangers and heaters.
Industrial Equipment:
Found in chemical, petrochemical, oil & gas, and power generation equipment.
General Fabrication:
Used in shipbuilding, water treatment, and other general engineering projects.
Advantages
Good Weldability:
Easily welded using standard procedures, simplifying fabrication.
Excellent Formability:
Can be shaped and formed into various components.
Corrosion Resistance:
Offers good resistance to pitting, crevice, and general corrosion, along with resistance to stress corrosion cracking.
Cost-Effective:
Generally more economical than higher-strength steels, making it suitable for many applications.
Suitable for Low/Medium Temps:
Performs well in low to medium temperature environments.
Standard Compliance:
Meets ASTM A285/ASME requirements for consistent quality.
Request a professional quotation for SA 285 Gr. C from GNEE Steel.
What kind of material is SA 285 Gr.C?
SA 285 Gr.C is a carbon steel plate material designed for use in welded pressure vessels. It is covered by ASME SA-285 and is equivalent to ASTM A285 Grade C, intended for low to moderate pressure and temperature applications.
What are the main characteristics that make SA 285 Gr.C suitable for pressure vessels?
Its main advantages include good weldability, good formability, moderate strength, and relatively low cost, which make it a practical choice for non-severe pressure vessel service.
In which industries and products is SA 285 Gr.C commonly used?
It is widely used in the chemical, petrochemical, and general manufacturing industries for items such as pressure vessel shells, storage tanks, heat exchanger components, and various process equipment.
Can SA 285 Gr.C be easily welded, and what should be noted?
Yes, SA 285 Gr.C has good weldability and can be welded by common methods. However, for thicker plates or highly restrained joints, proper preheating and/or post-weld heat treatment may be necessary to avoid cracking.
What heat treatment is SA 285 Gr.C usually subjected to?
SA 285 Gr.C is often supplied in the as-rolled or normalized condition. Heat treatment is not always required, but stress relief heat treatment may be applied depending on thickness, welding, and design considerations.
What is the difference in strength between SA 285 Gr.C and the lower grades (Gr.A, Gr.B)?
SA 285 Gr.C has the highest minimum specified strength among the three grades. Gr.A has the lowest strength, Gr.B is in the middle, and Gr.C is chosen when higher strength is needed while maintaining good formability and weldability.
When would one choose SA 387 over SA 285 Gr.C?
SA 387 (Cr-Mo) steels are preferred for high-temperature and hydrogen-service applications, such as in refineries and power plants. SA 285 Gr.C, being a plain carbon steel, is more suited for lower temperature and less severe conditions.
How does SA 285 Gr.C perform in low-temperature environments compared to A516 grades?
SA 285 Gr.C is not optimized for low-temperature toughness. A516 grades, such as A516 Gr.70, are specifically designed to have better impact properties at lower temperatures, making them more suitable for cold-service applications.
How well does SA 285 Gr.C resist corrosion?
SA 285 Gr.C has only moderate corrosion resistance and is typically used with non-corrosive or mildly corrosive fluids. In more aggressive environments, protective coatings, linings, or higher-alloy steels are usually required.
What factors should be considered when selecting SA 285 Gr.C for a project?
Key factors include operating pressure and temperature, the nature of the fluid being handled, required toughness (especially at low temperatures), fabrication and welding requirements, and overall cost. SA 285 Gr.C is a good choice when moderate performance and cost-effectiveness are the main priorities.