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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
ASTM A302/A302M A302GrB steel, ASTM A302/A302M A302GrB steel Chemical Composition
ASTM A302/A302M A302GrB steel shall be normally supplied in the as-rolled condition. ASTM A302/A302M A302GrB steel plates may be ordered normalized or stress relieved, or both. If ASTM A302/A302M A302GrB steel above 50mm in thickness shall be normalized.
ASTM A302/A302M A302GrB steel
ASTM A302/A302M A302GrB steel Chemical Composition:
|
Carbon, max |
% |
Manganese, max |
% |
Silicon, max |
% |
Sulfur max |
% |
|
25mm or under |
0.2 |
Heat Analysis |
1.15-1.50 |
Heat Analysis |
0.15-0.40 |
All thick |
0.035 |
|
25-50mm |
0.23 |
Product Analysis |
1.07-1.62 |
Product Analysis |
0.13-0.45 |
||
|
over 50mm |
0.25 |
|
|
|
|
||
|
|
|
Molybdenum max |
% |
Nickel max |
% |
Phosphorus |
% |
|
|
|
Heat Analysis |
0.45-0.60 |
Heat Analysis |
… |
All thick |
0.035 |
|
|
|
Product Analysis |
0.41-0.64 |
Product Analysis |
… |
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Tags: A302GrA steel, A299GrB steel, A299GrA steel