What’s ASTM A216 WCB for carbon steel castings?

ASTM A216 covers three grades of carbon steel (Grades WCA, WCB, and WCC). The selection of which grades shall depend on the design and service conditions, mechanical properties, and the high temperature characteristics.

Steel castings shall be heat treated and furnished, as appropriate to their design and chemical composition, in the annealed, or normalized, or normalized and tempered conditions after they have been allowed to cool below the transformation range.

ASTM A216 WCB for carbon steel castings

A216 WCB is carbon steel castings for valves, flanges, fittings, or other pressure-containing parts for high-temperature service and of quality suitable for assembly with other castings or wrought-steel parts by fusion welding.

A216 WCB Temperature Range: -29~425°C

A216 WCB Equivalent material: ASTM A105

A216 WCB Suitable Fluid: Oil, Gas, Water, Petrochemical, non Corrosion Fluid

ASTM A216 WCB Material Properties and Chemical Composition:

Material Properties

Density: 7.82 g/cm3 (488 lb/ft3)

Elastic (Young’s, Tensile) Modulus: 210 GPa (30 x 106 psi)

Elongation at Break: 25 %

Specific Heat Capacity: 450 J/kg-K

Strength to Weight Ratio: 73 kN-m/kg

Tensile Strength: Ultimate (UTS): 570 MPa (83 x 103 psi)

Tensile Strength: Yield (Proof): 280 MPa (41 x 103 psi)

Thermal Expansion: 11.9 µm/m-K

Alloy Composition

Iron (Fe): 97.0 to 100 %

Manganese (Mn): 0 to 1.0 %

Residuals: 0 to 1.0 %

Silicon (Si): 0 to 0.6 %

Carbon (C): 0 to 0.3 %

Sulfur (S): 0 to 0.045 %

Phosphorus (P): 0 to 0.04 %