ASME SA387 Grade 5 Class 2 Plate is a type of alloy steel plate specifically engineered for high-temperatureapplications. These plates are characterized by their chromium-molybdenum composition, which provides excellentresistance to heat and corrosion. The addition of molybdenum enhances the strength and durability of the steel, makingit suitable for use in pressure vessels and industrial boilers operating under extreme conditions.
Equivalents
| BS | EN | ASME | DIN |
| ... | ... | SA387-5-2 | ... |
Specifications ASME SA387 Grade 5 Alloy Steel Plates
Chromium & Molybdenum content (according to the ASME specification)
| Designation | Nominal Chromium Content (%) |
Nominal Molybdenum Content (%) |
| SA387 Grade 5 | 5.00% | 0.50% |
Tensile Requirements for ASME SA387 Grade 5 Alloy Steel Plates Class 2 Plates
| Designation: | Requirement: | Grade 5 |
|
SA387 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 ASME SA387 Grade 5 Alloy Steel Plates
| Element | Chemical Composition (%) | |
| SA 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 |
Key Applications
Oil & Gas
It is widely used in core facilities and equipment across the upstream and downstream sectors, including refineries for crude oil processing, rugged exploration equipment for onshore and offshore drilling operations, corrosion-resistant long-distance pipelines for oil and gas transmission, and large-scale storage tanks for storing crude oil, natural gas and refined products. It performs stably even in mild sour-service environments containing low-concentration hydrogen sulfide.
Petrochemical & Chemical
It serves as an ideal material for manufacturing critical processing equipment, such as high-pressure reactors for chemical synthesis, thick-walled pressure vessels for storing corrosive media, and high-temperature process piping networks. Especially, it shows excellent performance in harsh sour gas conditions with hydrogen sulfide, effectively resisting sulfide stress corrosion and ensuring the safe and continuous operation of production lines.
Power Generation
It is applied to fabricate key components of thermal and nuclear power plants, including industrial boiler drums and furnace walls, heat recovery steam generators (HRSG) for waste heat utilization, high-temperature turbine casings, and the associated high-pressure steam and water supply piping systems. Its outstanding high-temperature strength and creep resistance meet the long-term operation requirements of power generation equipment.
Industrial Equipment
It is extensively adopted in the manufacturing of general heavy machinery components that require high load-bearing capacity, food processing equipment that demands hygiene and corrosion resistance, and core thermal processing units in pulp & paper manufacturing, such as digesters and drying system components, supporting the stable operation of diverse industrial production.
Get an valued quotation for ASME SA387 Grade 5 Class 2, Contact GNEE Steel.
1.What is SA 387 Gr 5 Cl 2?
It is a Cr-Mo alloy steel plate per ASME SA-387, designed for high-temp and high-pressure welded pressure vessels and boilers, with good oxidation, creep and mild sour-service corrosion resistance.
2.How is it different from SA 387 Gr 5 Cl 1?
The key difference is tensile strength-Cl 2 has higher minimum strength than Cl 1, making it suitable for more demanding high-pressure working conditions.