August 16, 2013

Carbon Steel WCA-Casting Material

WCA (UNS J03002) is covered by ASTM A216 standard, which specification covers carbon steel castings for valves, fittings, flanges and other pressure-containing parts for high temperature service and the quality required for assembly with other castings or wrought steel parts by fusion welding. These grades are all “cast” grades meaning they are made through “casting” which is a manufacturing process where a liquid material is poured into a mold and allowed to harden..

WCA Chemical Requirements and Mechanical Property:

ASTM A216/a216M Standard Specification for Steel Castings, Carbon, Suitable for Fusion Welding for High Temperature Service.:
Carbon: 0.25max
Manganese: 0.70 max
Silicon: 0.60 max
Sulfur: 0.045 max
Phosphorus: 0.040 max
Copper: 0.30 max
Nickel: 0.50 max
Chromium: 0.50 max
Molybdenum: 0.20 max
Vanadium: 0.03 max
All total of those specified residual elements 1.00max
Tensile Strength: 60-85ksi(415-585Mpa)
Yield Strength: 30ksi (2050Mpa) min
Elongation in 2in. or 50mm: min 24.0%
Reduction of area: 35% min
Hardness: 137HB min.

WCA Heat treatment process: generally all castings need to be anneal or normalization.
Anneal at 890-910°C
Normalization at 870-890 °C
Manufacture Process: sand casting, precision investment casting.

WCA is also indicated In China standard of GB/T 12229 General Purpose Industrial Valve Specification of Carbon Steel Casting. The chemistry and mechanical property are same as A216 WCA. It is same as Chinese casting material of ZG205-415


Cast Steel Pump Body

Cast Steel Pump Body

Valve bodies/bonnet.


WCA may be welded

Preheat not required.

What means of WCA:

WCA stands for “Wrought Carbon” with Grade A. Sometimes you can think “C” as casting.

There are 3 kind of Grade A, B & C which define the ductility & tensile strength.

Grade B is having very good ductility & tensile strength as compare to Grade A & C.

Carbon Steel, Material ,

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