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Executive Standard: SA299 Gr. B steel plates comply with the ASME standard, specifically ASTM A299/A299M.2026-08-26
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SA299 is a carbon-manganese-silicon steel plate designed for pressure vessels—often referred to as "gas drum steel" under US standards.2026-08-19
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ntroduction to SA299 Gr.A Steel Plate:
SA299 Gr.A is a steel plate grade designated for boilers and pressure vessels under American standards.2026-08-11 -
A285 Gr.C and SA285 Gr.C steel plates represent the same grade, though they are governed by different standards.2026-08-04
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SA283 Gr.B is a low-to-medium strength carbon structural steel plate conforming to the American Society of Mechanical Engineers (ASME) standard.2026-07-31
a387 grade 11 class 2 steel plate,a387 grade 11 class 2 chemical composition
a387 grade 11 class 2 steel plate under ASTM standard, it is a kind of chromium molybdenum pressure vessel steel.
|
Element |
|
Chemical Composition (%) inc. Grade UNS No. |
|
|
|
Grade 11 (UNS: K11789) |
|
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 |
|
Designation: |
Requirement: |
grade 11 class 2 |
|
a387 grade 11 class 2 |
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 % |
––– |