ASTM A387 Grade 12 Class 1 is a chromium-molybdenum alloy steel plate for welded pressure vessels and boilers used at elevated temperatures, providing good strength and corrosion resistance.
Equivalents
| BS | EN | ASTM/ASME | DIN |
| 620 B | 13 CRMO 45 | A387-12-1 | 13 CRMO 44 |
Specifications for ASTM A387 Grade 12 Alloy Steel Plates
Chromium & Molybdenum content (according to the ASME specification)
| Designation | Nominal Chromium Content (%) |
Nominal Molybdenum Content (%) |
| A387 Grade 12 | 1.00% | 0.50% |
Tensile Requirements for ASTM A387 Grade 12 Alloy Steel Plates Class 1 Plates
| Designation: | Requirement: | Grade 12 |
| A387 Grade 12 | Tensile strength, ksi [MPA] | 65 to 85 [450 to 585] |
| Yield strength, min, ksi [MPa]/(0.2% offset) | 40 [275] | |
| Elongation in 8 in. [200mm], min % | 19 | |
| Elongation in 2 in. [50mm], min, % | 22 | |
| Reduction of area, min % | ––– |
Chemical Requirements for ASTM A387 Grade 12 Alloy Steel Plates
| Element | Chemical Composition (%) | |
| ASTM A387 Grade 12 | ||
| Carbon: | Heat Analysis: | 0.05 - 0.17 |
| Product Analysis: | 0.04 - 0.17 | |
| Manganese: | Heat Analysis: | 0.40 - 0.65 |
| Product Analysis: | 0.35 - 0.73 | |
| Phosphorus: | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Sulphur (max): | Heat Analysis: | 0.035 |
| Product Analysis: | 0.035 | |
| Silicon: | Heat Analysis: | 0.15 - 0.40 |
| Product Analysis: | 0.13 - 0.45 | |
| Chromium: | Heat Analysis: | 0.80 - 1.15 |
| Product Analysis: | 0.74 - 1.21 | |
| Molybdenum: | Heat Analysis: | 0.45 - 0.60 |
| Product Analysis: | 0.40 - 0.65 |
Applications
Pressure Vessels & Boilers: Core use for safe containment and operation under elevated temperatures and pressures.
Oil & Gas Industry: Ideal for sour service (containing hydrogen sulfide) due to chromium content, used in drilling, processing, and refining equipment.
Petrochemical Industry: Heat exchangers, condensers, and storage tanks for various chemical processes.
Power Generation: Components in thermal and nuclear power plants operating at high temperatures.
Chemical Processing: Equipment requiring corrosion resistance and high-temperature performance.
Request a professional quotation for ASTM A387 Grade 12 Class 1 from GNEE Steel.
1.What is A387 gr 12 material?
A387 Grade 12 Class 2 is a high quality chrome molybdenum steel which is ideal for elevated temperature service and offers excellent anti corrosion characteristics. The steel has a wide range of uses including industrial boilers and pressure vessels, especially in environments where high temperature levels are common.
2.What is ASTM A387 material?
The ASTM A387 specification is the Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum plates used in the application of welded boilers and pressure vessels subjected to elevated temperatures. The two grades SSAB produces are available as Class 1 and/or Class 2.
3.What is the price of SA 387 GR 12 plate?
The price for SA 387 Gr 12 plate varies significantly but generally falls in the range of $800 to over $3,000 USD per ton, depending on supplier, quantity (e.g., 1-9 tons vs. bulk), thickness, finish, and specific class (Class 1 or 2), with many suppliers quoting FOB prices around $1,000 to $5,000/ton, reflecting its use in high-temperature pressure vessels.