ASME SA302GRB steel plate equal to 15CrMoR steel plate

SA302GrB steel plate is one kind Molybdenum alloy steels in ASME SA302/SA302M,SA302 Grade B is totally equal to A302 Grade B in ASTM A302/A302 steel specification.However which steel grade in Chinese steel specification is equivalent to SA302 Grade B steel plate ?

Comparasion mechincal property and chemical composition from the below table,we found 15CrMoR steel plate in steel standard GB/T713 for boiler building used steels is very similar to SA302GRB steel plate.They are all need Mo % above 0.45% when supplying and heat treatment with Normalized.Else,15CrMoR steel plate have more restriction for P% and S% when rolling.

SA302 Grade A steel plate used for manufacture boilers and pressure vessels with Mo (Min.0.45%) alloy.15CrMoR steel plate also used for boilers and with Mo alloy within 0.45-0.6% in heat analysis rolling.

Comparasion in chemical composition and mechanical strengths in below table,in most situiations,SA302 Grade A steel plate is equal to 15CrMoR steel plate when built boilers and pressure vessels

Both SA302GrB pressure vessel steel plate and 15CrMoR hot rolled steel plate are widely used in boilers, pressure vessels, and heat exchangers, with their equivalence validated in numerous industrial projects:

Typical Applications of SA302GrB

Overseas ASME-certified projects: Petrochemical reactors, natural gas processing pressure vessels, and boiler superheater tubes.

High-pressure, low-temperature scenarios: Hydrogenation reactors, LNG plant auxiliary equipment, and thermal power plant high-pressure heaters.

Advantage: Global standard recognition simplifies cross-border procurement and project certification, making it a top choice for international EPC projects.

Typical Applications of 15CrMoR

Domestic GB-standard projects: Coal-fired power plant boiler drums, chemical industry methanol synthesis reactors, and sewage treatment pressure vessels.

Corrosive high-temperature environments: Sulfuric acid production equipment, hydrogen sulfide treatment towers, and waste incineration boiler heat exchange components.

Advantage: Cost-effectiveness (10-15% lower than SA302GrB) and mature domestic supply chains, suitable for domestic projects with strict cost controls.

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