Home – SA387 Plates – SA387 Gr 11 Class 1 Plates
SA387 Gr 11 Class 1 Plates
The oil, gas, and petrochemical sectors, where liquids and gases are frequently held at higher temperatures, employ this steel extensively as a pressure vessel grade for use in elevated temperature operation.
In addition to providing superior corrosion and oxidation resistance, the increased chromium levels are a must for sour gas applications. Please see our ASME SA387 Grade 11 Class 1 technical requirements below.
SA387 Gr 11 Class 1 Plates Specifications
| Designation | Nominal Chromium Content (%) | Nominal Molybdenum Content (%) |
|---|---|---|
|
SA387 Grade 11 |
1.25% |
0.50% |
Equivalents for SA387 Gr 11 Class 1 Plates
| BS | EN | ASTM/ASME | DIN |
|---|---|---|---|
|
621 B |
– – – |
SA387-11-1 |
– – – |
Tensile Requirements for ASME SA387 Grade 11 Alloy Steel Plates Class 1 Plates
| Designation: | Requirement: | Grade 11 |
| SA387 Grade 11 | Tensile strength, ksi [MPa] | 75 to 100 [515 to 690] |
| Yield strength, min, ksi [MPa]/(0.2% offset) | 43 [310] | |
| Elongation in 8 in. [200mm], min % | 18 | |
| Elongation in 2 in. [50mm], min, % | 22 | |
| Reduction of area, min % | ––– |
Chemical Requirements for ASME SA387 Grade 11 Alloy Steel Plates
| Element | Chemical Composition (%) | |
| SA387 Grade 11 | ||
| 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: | 0.50 – 0.80 |
| Product Analysis: | 0.44 – 0.86 | |
| Chromium: | Heat Analysis: | 1.00 – 1.50 |
| Product Analysis: | 0.94 – 1.56 | |
| Molybdenum: | Heat Analysis: | 0.45 – 0.65 |
| Product Analysis: | 0.45 – 0.70 |
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