ASTM A204 Grade B Molybdenum Steel

ASTM A204 grade B is a type of ASTM A204 steel. Cited properties are appropriate for the as-fabricated (no temper or treatment) condition. The grabars on the material properties cards below compare ASTM A204 grade B to: wrought alloy steels in the same category (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

ASTM A204 Grade B Molybdenum Steel

Mechanical

Tensile strength Rm0 - 620 MPa at 20 °C

Yield strength YS275 MPa at 20 °C

chemical compositions [%]

C:0.27 Si:0.13-0.45 Mn: 0.95 P: 0.035 S: 0.035 Mo:0.41—0.64

ASTM A204 specification covers molybdenum alloy steel plates, intended particularly for welded boilers and other pressure vessels. Plates under this specification are available in three grades having different strength levels: Grade A; Grade B; and Grade C. The steel shall be killed. The steel shall conform to the chemical requirements specified. Tension tests on plates shall conform to the requirements specified.

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