WCB Cast Carbon Steel

ASTM A216 / WCB. WCB is the standard cast carbon steel for valve bodies, pump casings and flanges in general (non-corrosive) service up to about 425 °C.

Chemical composition (nominal wt %)

Element	%
Carbon (C)	≤0.30
Manganese (Mn)	0.60–1.00
Silicon (Si)	≤0.60
Sulfur (S)	≤0.045
Phosphorus (P)	≤0.045

Mechanical properties

Property	Value
Tensile strength	485–655 MPa (70–95 ksi)
Yield strength	250 MPa (36 ksi) min
Elongation	22% min
Reduction of area	35% min

Density: 7.85 g/cm³ · Heat treatment: Annealed, normalized, or normalized-and-tempered per A216.

Cross-standard equivalents

Standard	Equivalent grade
EN	EN 1.0619 (GP240GH)
GB	ZG230-450
JIS	SCPH2

Equivalents by nominal class — confirm exact chemistry & spec for critical parts.

Typical applications

Valve bodies & bonnets
Pump casings
Pipe fittings & flanges
General pressure parts (≤425 °C)

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FAQ

What is the EN and GB equivalent of ASTM A216 WCB?

WCB is broadly equivalent to EN 1.0619 (GP240GH) and GB ZG230-450 — a cast carbon steel for valve and pump bodies. Confirm grade and pressure rating for critical parts.