ASTM A387 Grade 5 Class 2 is a specific type of chromium-molybdenum alloy steel plate designed for weldable pressure vessels and boilers operating at high temperatures, known for excellent corrosion resistance (due to chromium) and enhanced strength (from molybdenum) at elevated temperatures.
Equivalents
| BS | EN | ASME | DIN |
| ... | ... | A387-5-2 | ... |
Specifications ASTM A387 Grade 5 Alloy Steel Plates
Chromium & Molybdenum content (according to the ASME specification)
| Designation | Nominal Chromium Content (%) |
Nominal Molybdenum Content (%) |
| A387 Grade 5 | 5.00% | 0.50% |
Tensile Requirements for ASTM A387 Grade 5 Alloy Steel Plates Class 2 Plates
| Designation: | Requirement: | Grade 5 |
|
A387 Grade 5 |
Tensile strength, ksi [MPA] | 75 to 100 [515 to 690] |
| Yield strength, min, ksi [MPa]/(0.2% offset) | 45 [310] | |
| Elongation in 8 in. [200mm], min % | ... | |
| Elongation in 2 in. [50mm], min, % | 18 | |
| Reduction of area, min % | 45 (measured on round specimen) 40 (measured on flat specimen) |
Chemical Requirements for ASTM A387 Grade 5 Alloy Steel Plates
| Element | Chemical Composition (%) | |
| A 387 Grade 5 | ||
| Carbon: | Heat Analysis: | 0.15 max |
| Product Analysis: | 0.15 max | |
| Manganese: | Heat Analysis: | 0.30 - 0.60 |
| Product Analysis: | 0.25 - 0.66 | |
| Phosphorus: | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulphur (max): | Heat Analysis: | 0.030 |
| Product Analysis: | 0.030 | |
| Silicon: | Heat Analysis: | 0.50 max |
| Product Analysis: | 0.55 max | |
| Chromium: | Heat Analysis: | 4.00 - 6.00 |
| Product Analysis: | 3.90 - 6.10 | |
| Molybdenum: | Heat Analysis: | 0.45 - 0.65 |
| Product Analysis: | 0.40 - 0.70 |
Applications:
Petrochemical & Oil & Gas: Pressure vessels, reactors, heat exchangers, storage tanks, refinery equipment (catalytic cracking, hydrogenation units).
Power Generation: Boilers, high-temperature piping, pressure vessels.
Chemical Industry: Vessels for processing corrosive substances.
Fertilizer Industry: Towers for ammonia and urea synthesis.
If you want to learn more about ASTM A387 Grade 5 Class 2 GNEE's products, you can send an email to beam@gneesteelgroup.com. We are more than happy to assist you.
1.What is A 387 Grade 5 CL 2 material?
ASTM A387 Grade 5 Class 2 is a chromium-molybdenum (Cr-Mo) alloy steel plate designed for weldable pressure vessels and boilers needing strength and corrosion resistance at high temperatures, with "Grade 5" indicating its specific Cr/Mo content (around 5% Cr, 0.5% Mo) and "Class 2" signifying a higher tensile strength level compared to Class 1, making it ideal for demanding elevated-temperature industrial uses.
2.What kind of steel is grade 5?
Grade 5 steel is a medium carbon steel that's heat-treated (quenched and tempered) for increased strength, offering a balanced performance between lower-strength Grade 2 and higher-strength Grade 8 fasteners, commonly used in automotive and construction for its good durability and moderate tensile strength, identified by three radial lines on the head.