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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 A455 Mechanical behavior,ASTM A455 Heat Treatment
ASTM A455 is a steel of 16. Steel for Boilers and Pressure Vessels,good performance,Provides a ASTM A455 brief description of A455 and some properties.
ASTM A455 Mechanical behavior:
Tensile strength σb (MN/m2)> = 550
Yield strength σs (MN/m2)> = 200
Elongation δ5 (%)> = 40
Shrinkage ψ (%)> = 55
Hardness: ≤ 187HB; ≤ 90HRB; ≤ 200HV
ASTM A455 Heat Treatment:
Conditions A - 1900 (1038 C) for 30 minutes and cool below 60 F (16 ℃) for a complete martensite transformation. CONDITION H 950 - Treat Condition 1 hour, air cool material in 900 F (482 C) .. condition H925, H1025, H1075, H1100, H1150 soak 4 hours solution treated material at a specific temperature, air cool, CONDITION H1150M, soak solution treated material at 1400 ℉ (760 C), 2 hours, air cool, then re-heat to 1150 F for 4 hours and air cooling (620 C).
ASTM A455 Welding performance:
Successful common fusion and resistance welding method, this should not be added to alloy oxyacetylene welding. If necessary, I suggest AWS E/ER630 filler metal.
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