ASTM A387 | Grade 5 Class 2 | Alloy Steel Plate
At Gnee Steel, we proudly serve as a dedicated supplier and proficient exporter specializing in ASTM A387 / ASME SA387 GRADE 5 Class 1 alloy steel plates. Committed to delivering excellence, we provide top-tier products that meet industry standards, catering to a wide range of industrial applications. Our alloy steel SA 387 GR. 5 CL. 1/2 plates are expertly crafted for deployment in steel pressure vessels operating at high temperatures and challenging environments.
ASTM A387 grade 5 class 2 is ASTM A387 grade 5 steel in the normalized and tempered condition. The graph bars on the material properties cards below compare ASTM A387 grade 5 class 2 to: wrought alloy steels in the same category (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
ASTM A387 Grade 5 Class 2– high quality chromium-molybdenum alloy steel plate, ideal for use in pressure vessels and industrial boilers due to it's excellent heat resistant and anti corrosion properties.
ASTM A387 Gr 5 CL 2 is a chromium molybdenum alloy steel plate intended primarily for welded boiler and pressure vessels designed of elevated temperature service. The Cr content 5.00% and the Mo content0.5%.
Key Characteristics
Alloy Composition: Contains 4.00-6.00% Chromium (Cr) and 0.45-0.65% Molybdenum (Mo).
Enhanced Properties: Molybdenum improves high-temperature strength, while Chromium provides better corrosion and oxidation resistance.
Condition: Usually supplied in the Normalized and Tempered (Class 2) condition for improved mechanical properties.
Mechanical Strength: Offers good tensile strength, yield strength, hardness, and toughness at elevated temperatures.
Corrosion Resistance: Resists pitting, crevice corrosion, and environmental cracking, even at high temperatures.
Applications
Pressure Vessels & Boilers: Its primary use is in constructing welded equipment for high-temperature service.
Oil & Gas: Used in refinery units, storage tanks, and pipelines.
Chemical & Petrochemical: Found in reactors, heat exchangers, and processing equipment.
Power Generation: Utilized in boilers and other high-temperature systems.
ASTM A387 GR 5 CLASS 2 Plate Specification
Grade : ASTM A387 Gr 5 CL.2 Alloy Steel Plates
Standard : ASTM A387 / ASME SA387
Width : 1000mm-4500mm
Thickness : 5mm-150mm
Length : 3000mm -18000mm
Impact tested : -52° C
Process : Hot-Rolled (HR)
Equivalents
| BS | EN | ASME | DIN |
| ... | ... | A387-5-2 | ... |
Chromium & Molybdenum content
| 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 |
1 What is ASTM A387 Grade 5 Class 2 material?
ASTM A387 Grade 5 Class 2 is a chromium-molybdenum alloy steel plate designed for weldable pressure vessels and boilers operating at elevated temperatures, offering good corrosion resistance and enhanced high-temperature strength due to its alloy composition, with "Class 2" indicating higher tensile strength and yield strength than Class 1, typically requiring normalization and tempering for specific mechanical properties.
2What are the primary advantages of ASTM A387 grade 5 class 2 material?
ASTM A387 Grade 5 Class 2 offers primary advantages like excellent high-temperature strength, superior corrosion resistance (especially against sulfur compounds), good weldability, high toughness, and durability, making it ideal for demanding pressure vessels and boilers in oil & gas, petrochemical, and chemical processing where elevated temperatures and corrosive fluids are common. Its Chromium-Molybdenum (Cr-Mo) alloy composition enhances these properties, providing reliability in harsh industrial environments.
3What are the differences between ASTM A387 Grade 5 Class 1 and ASTM A387 Grade 5 Class 2?
ASTM A387 Grade 5 Class 1 and Class 2 have the same chemical composition, but differ in their strength requirements, with Class 2 having significantly higher minimum tensile and yield strengths (e.g., 310 MPa yield vs. 205 MPa for Class 1), while both typically have the same minimum elongation, making Class 2 stronger for high-temperature pressure vessel applications.
4What is the composition of ASTM A387 Grade 5 Class 2?
ASTM A387 Grade 5 Class 2 is a chromium-molybdenum alloy steel for high-temperature pressure vessels, primarily composed of iron with significant Chromium (4.0-6.0%) for corrosion resistance and Molybdenum (0.45-0.65%) for elevated temperature strength, along with controlled limits for Carbon (0.15% max), Manganese (0.30-0.60%), Phosphorus (0.025% max), Sulfur (0.025% max), and Silicon (0.50% max).
5What is the density of ASTM A387 Grade 5 Class 2?
The density for ASTM A387 Grade 5 Class 2 steel is typically around 7.80 g/cm³ (0.282 lb/in³), as it's a chromium-molybdenum alloy steel, falling within the general range of steel densities (7.7–8.03 g/cm³) but being consistent with other ASTM steels.
If you want to learn more about ASTM A387 Grade 5 Class 2 GNEE's products, you can send an email to info@gneesteels.com . We are more than happy to assist you.
