Standards/Specs

Typical Chemical and Physical Specifications by Alloy- heat treat for the alloys we handle:

Please click on alloy for .pdf published by www.Matweb.com.

Aluminum Sand Castings Alloys:
319F (PDF - 36.4 KB)
319-T5 (PDF - 34.3 KB)
319-T6 (PDF - 52.2 KB)
356-T51 (PDF - 53.3 KB)
356-T6 (PDF - 52.4 KB)

Ductile Iron Sand Casting Alloys:
60-40-18 (PDF - 19.9 KB)
65-45-12 (PDF - 21.2 KB)
80-55-06 (PDF - 21.4 KB)
100-70-03 (PDF - 20.3 KB)

Cast Iron Sand Casting Alloys:
CL-20 (PDF - 24.4 KB)
CL-25 (PDF - 24.4 KB)
CL-30 (PDF - 24.6 KB)
CL-35 (PDF - 24.6 KB)
CL-40 (PDF - 24.6 KB)

Metal
Aluminum Alloys
Magnesium Alloys
Cast Iron
Ductile Irons
Cast Steels

Tolerance (+/- inch/foot)
1/32
1/32
3/64
1/32
1/64

	Green Sand		Precision Molding		Chemically Bonded Molding
	Sand Casting	Permanent Mold Cast	Die Casting	Ceramic & Investment Casting	CO2, No-Bake
Typical dimensional tolerances, inches	+ .010"- + .030"	+ .010"- + .050"	+ .001"- + .015"	+ .010"- + .020"	+ .005"- + .015"
Relative cost In quantity	Low	Low	Lowest	Highest	Medium High
Relative cost For small number	Lowest	High	Highest	Medium	Medium High
Permissible weight of castings	Unlimited	100 lbs.	75 lbs.	Ounces To 100 lbs.	½ lbs To tons
Thinnest section castable, inches	1/10"	1/8"	1/32"	1/16"	1/10"
Relative surface Finish	Fair to Good	Good	Best	Very Good	Fair
Relative ease of casting complex designs	Fair To Good	Fair	Good	Best	Good
Relative ease of changing design in production	Best	Poor	Poorest	Fair	Best
Range of alloys that can be cast	Unlimited	Aluminum-base and copper-base preferable	Aluminum-base preferable	Unlimited	Unlimited

As-cast condition	Casting without secondary machining.
Corebox	The wooden, metal, or plastic tool used to produce core.
Draft	Taper on the vertical sides of a pattern or corebox which permits the core or sand mold to be removed without distorting or tearing of the sand.
Finish Allowance (Stock)	The amount of stock left on the surface of a casting for machining.
Flask	A metal or wood rigid frame without top and without fixed bottom used to hold the sand of which a mold is formed; usually consisting of two parts, cope and drag.
Gating	The set of channels in a mold through which molten metal is poured to fill the mold cavity.
Heat Treatment	A combination of heating and cooling operations timed and applied to a metal or alloy in the solid state in a manner which will produce desired properties.
Pattern	The wood, metal, or plastic shape used to form the cavity in the sand. A pattern may consist of one or many impressions and would normally be mounted on a board or plate.
Patternmaker's shrinkage	The shrinkage allowance made on all patterns to compensate for the change in dimensions as the solidified casting cools in the mold from freezing temperature of the metal to room temperature. Pattern is made larger by the amount of shrinkage characteristic of the particular metal in the casting and the amount of resulting contraction to be encountered.