We supply high quality ASME SA387 Gr 12 Class 2 and ASTM A387 Gr22 Class 2 chrome moly pressure vessel steel plates from various origin such as Korea, Japan, China, Belgium & Germany. A387-12-2 and SA387-22-2 are described as “Standard Specification for Pressure Vessel Plates, Chromium-Molybdenum Carbon Alloy Steel “.
Description
ASME SA387 Grade 12 Class 2
Engineered for use in elevated temperature service, ASME SA387 Grade 12 is a chrome molybdenum carbon alloy steel for use in weldable pressure vessels and industrial boilers.
The material benefits from added chromium which provides excellent corrosion and oxidation resistance making it ideal for sour service applications in the oil and gas industry.
Equivalents
| BS | EN | ASTM/ASME | DIN |
| 620 B | 13 CRMO 45 | SA387-12-2 | 13 CRMO 44 |
Chromium & Molybdenum content (according to the ASME specification)
| Designation |
Nominal Chromium Content (%) |
Nominal Molybdenum Content (%) |
| SA387 Grade 12 | 1.00% | 0.50% |
| 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 ASME SA387 Grade 12 Alloy Steel Plates
| Element | Chemical Composition (%) | |
| ASME SA387 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 |
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