The desired cavity in the final castings are formed

The cope and drag are clamped together securely during the pouring of the molten metal.

That the pattern can be easily taken out of the sand without damaging the cavity in the sand.

There is adequate material to fill the cavity during the cooling and solidification of the molten metal.

The cavity in the sand in the cope and drag matches up to form the intended geometry.

The cope and drag are clamped together during the pouring of the molten metal.

That the pattern can be easily taken out of the sand without damaging the cavity in the sand.

The desired cavity in the final castings are formed.

There is adequate material to fill the cavity during the cooling and solidification of the molten metal.

Casting usually leaves a slightly rough surface. For regions that do not interact with other parts, machining is not required.

Machining is needed to ensure a smooth surface and precision in location.

Machining should be kept to a minimal to save cost.

Cores can be used to reduce the amount of material removed during machining, saving on machining cost and material usage.

Steel has a high melting point.

Molten steel does not flow easily.

Molten steel is highly reactive with the gasses in the environment.

Cast steel products are unsuitable for machining and hot forming.

Casting does not bring out the good mechanical properties compared to other means such as hot forming processes such as forging and hot rolling.

The part needs to be made out of metal.

The part need to be lightweight.

To reduce production time

To reduce machining steps

To make really large components

To reuse the mould for mass production

To make metal objects with complex internal cavities