Foundry cast steel, fabrication work, press work & more. We make foundry cast steel & can do all kinds of fabrication work and press work. See us for foundry cast steel, fabrication work & press work.

Maddox manufactures fittings in two classes of gray iron, two classes of ductile iron and high chrome iron.

The gray iron and pump iron conform to ASTM A48 Class 20 and the pump iron also conforms to ASTM A319 Class 11, Type C. The gray iron has a minimum tensile strength of 20,000 psi and a hardness of 160-200Brinell. The pump iron has the addition of chrome and magnesium, which makes it suitable for fittings exposed to higher temperatures. The tensile strength of the pump iron goes as high as 40,000 psi with a hardness of 180-241 Brinell.

Ductile iron castings, also known as spheroidal or nodular iron, are described as cast iron with the graphite substantially spheroidal in shape, instead of flakes as in gray iron, and essentially free of other forms of graphite. The fittings are manufactured to ATSM A536-84 in two grades depending on the application. Ductile irons offer resistance to abrasive wear without the brittleness of gray iron. Another material offering high resistance to abrasive wear is the white cast iron ASTM A532 Class 111 Type A called Maddox 28% chrome iron.

Mining operations like the phosphate mines in Florida that pump abrasive slurries prefer the Maddox Extrawear ductile fitting over any other material. Extrawear ductile combines the high wear characteristics that are needed without losing the ductibility that is needed for rough handling in the field. These same customers who have been using fittings welded with hard surface rod to resist wear, have replaced them with Maddox Extrawear ductile and have found extended wear life. There are many applications that should be using Extrawear ductile fittings. These applications require high wear characteristics for pumping abrasive slurries along with the ability to stress the flanges without breaking them. Another advantage of Extrawear ductile is that as a fitting wears thin, it will only leak instead rupturing, which is common with other fittings. Maddox Foundry's largest inventory is in Extrawear ductile fittings.

The 28% chrome iron fittings are usually found in manufacturing plants where long wear life is needed and the brittleness properties of 28% chrome iron are not a problem because of the rigid mounting found in plant facilities and the lack of large solids in the medium. These fittings can be used with either machined faces (acid fittings) or as cast (standard) depending on the fluid being pumped.

Some applications using polyethylene or cement-mortar lines can be replaced with 28% chrome iron or Extrawear ductile depending on the acidity and abrasiveness of the slurry. Cast fittings can be cost effective in replacing fabricated steel fittings found in many facilities.

Foundry Capabilities:

Heat Treating

6'x9'x18' Car Bottom Oven capable of normalization, quench & temper, and stress relief cycles.

Castings

The bearing pedestal pictured to the left was cast in our foundry then machined and assembled in our shop.

This particular one was cast out of Ductile Iron.

This pedestal is also used in the Sugar Industry.

For more pictures of Maddox products and capabilities, see our photo gallery.