ASTM A216 Grade WCC

STANDARDASTM A216FORMCastingUNSJ02503ASMESA-216 WCC

The lower-carbon, higher-manganese version of WCB. Higher proof strength and good weldability; preferred for higher pressure classes.

Rp0.2 · MPa: ≥ 275
Rm · MPa: 485–655
TEMPERATURE: −29 … +425 °C
COST

Representative sample of WCC: machined top face and as-cast side — REPRESENTATIVE IMAGE

Chemical composition

C≤ 0.25

Mn≤ 1.20

P≤ 0.04

S≤ 0.045

Si≤ 0.60

Cu≤ 0.30

Ni≤ 0.50

Cr≤ 0.50

Mo≤ 0.20

V≤ 0.03

%, maximum. For each 0.01% below the carbon maximum, Mn may be increased by 0.04% (up to 1.40). Total residual elements ≤ 1.00. P and S: current editions 0.035.

Mechanical properties

STANDARD · CONDITION	Rp0.2 MPa	Rp1.0 MPa	Rm MPa	A %	KV J
ASTM A216 · WCC	275	—	485–655	22	—

Room temperature. Reduction of area Z ≥ 35% (ASTM A216).

Service temperature

−29 °C+425 °C−200−1000100200300400500600700800

Same as WCB: starts at −29 °C; not used for prolonged periods above 425 °C (graphitization).

This is the limit of the material itself. A valve's service temperature is usually set by the seal and seat materials; product pages give it for each seal option.

Physical properties and heat treatment

HEAT TREATMENT: Normalizing, normalizing + tempering, or quenching + tempering.

Media suitability GENERAL TREND

Fresh water

Seawater

Steam

Hydrocarbons, oil

Dilute acid

Caustic

Air, gas

Low temperature

Emsal assessment. The final choice is made from corrosion tables, taking concentration, temperature, chloride content and flow velocity into account.

Strengths and weaknesses

Strengths

Higher proof strength than WCB
Low carbon: good weldability
Economical

Weaknesses

No corrosion resistance
Not used below −29 °C

Manufacturing and use

ECONOMY: Low.
MANUFACTURING METHODS: Sand casting
TYPICAL VALVE PARTS: Body · Bonnet

Surface protection

Wet paintIndustrial wet paint systemEmsal standard external protection
Epoxy powder coatingElectrostatic epoxy powder coating (oven-cured, FBE)Water lines, internal and external
GalvanizingHot-dip galvanizingSevere outdoor environments

Source: ASTM A216. Values compiled and verified by Emsal Vana; for binding values, refer to the current edition of the standard and the material certificate.