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ASTM A202 Grade B is a chromium-manganese-silicon low-alloy steel tailored for high-pressure, medium-temperature pressure vessel applications.2026-04-30
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ASTM A202 Grade A is a critical chromium-manganese-silicon low-alloy steel plate specifically designed for welded pressure vessels and boilers operating at medium temperatures.2026-04-30
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ASTM A202 Pressure Vessel Steel Material and Grades:
Alloy System: **Chromium-Manganese-Silicon (Cr-Mn-Si)** Low-Alloy Heat-Resistant Steel2026-04-17 -
ASTM A204/A204M Grade B molybdenum alloy steel plates for pressure vessels feature superior chemical composition and mechanical properties compared to Grade A2026-04-10
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As a molybdenum-alloy steel plate for pressure vessels under the ASTM A204/A204M standard, A204 Gr.A is a low-alloy, high-strength material specifically designed for service conditions involving moderate temperatures (≤400°C) and moderate-to-high pressure2026-03-31
a387 grade 5 class 2 steel plate,a387 grade 5 class 2 steel chemical composition
a387 grade 5 class 2 steel plate under ASTM standard which is a kind of low alloy pressure vessel steel. a387 grade 5 class 2 steel is intended for use it pressure vessels and boilers where the temperature is high. ASTM A387 Grade 5 is particularly suited to this application because of the chromium and molybdenum alloying elements.
|
Element |
|
Chemical Composition (%) inc. Grade & UNS No. |
|
|
|
Grade 5 (UNS: S50200) |
|
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 |
|
Designation: |
Requirement: |
Grade 5 |
|
a387 grade 5 class 2 |
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) |