Carbon steel have a good content of carbon, so it is easy to casting. especially A216 WCB.

It is important to clarify the meaning of carbon steel in the generic sense and in the more narrow context used in this report. The term steel is usually taken to mean an iron-based alloy containing carbon in amounts less than about 2%. Carbon steels (sometimes also termed plain carbon steels, ordinary steels, or straight carbon steels) can be defined as steels that contain only residual amounts of elements other than carbon, except those (such as silicon and aluminum) added for deoxidation and those (such as manganese and cerium) added to counteract certain deleterious effects of residual sulfur. However, silicon and manganese can be added in amounts greater than those required strictly to meet these criteria so that arbitrary upper limits for these elements have to be set; usually, 0.60% for silicon and 1.65% for manganese are accepted as the limits for carbon steel. Read more

Duplex Stainless steel has two phase microstructure consisting of grains of Ferritic and Austenitic stainless steel. It is mainly used in pump fittings and oil field. We can produce SAF2205 DUPLEX STAINLESS STEEL.

duplex stainless steel compare.pdf

Cast Iron is individed to four types: gray iron, ductile iron, malleable iron, vermicular cast iron, abrasion-resistant cast iron and corrosion resistant cast iron.

Generally, we mainly use sand casting method to make iron castings, such as green sand casting, resin sand casting, Sodium silicate sand casting , lost foam casting and centrifugal casting.

Gray iron: HT150, HT200, HT250, HT300, HT350 ( refer to s Read more

ASTM A995/995M, Standard Specification for Castings, Austenitic-Ferritic (Duplex) Stainless Steel, for Pressure-Containing Parts1

The duplex stainless steels offer a combination of enhanced mechanical properties and corrosion resistance when properly balanced in composition and properly heat treated. Ferrite levels are not specified, but these grades will develop a range of approximately 30 to 60 % ferrite with the balance austenite. Read more

Duplex stainless steel castings, sorted by standard.

Duplex Stainless steel has two phase microstructure consisting of grains of Ferritic and Austenitic stainless steel. It has a better strength and corrosion resistance property than stainless steel 304/316. Duplex stainless steels have lower nickel and molybdenum contents than their austenitic counterparts of similar corrosion resistance.

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Castings — System of dimensional tolerances and machining allowances

Mainly indicate the tolerance of castings, such as sand casting, investment casting, die casting and other casting method. Read more

The Engineering and physical properties of cast iron wary with the type of iron; the designer must match the engineering requirements with al the properties of the specific type of cast iron being consiered. Machinability, e.g., is significantly affected by the type of cast iron specified. Gray cast iron is the most machinalbe; the white cast irons are the least machinable. Read more

Cast Iron Castings:

the term cast iron covers a wide range of iron carbon silicon alloys containing from 2.0 to 4.0 percent carbon and from 0.5 to 3.0 percent silicon. the alloy typically also contains varying percentages of manganese, sulfur, and phosphorus along with other alloying elements such as chromium, molybdenum, copper and titanium. For a type and grade of cast iron, those elements are specifically and closely controlled. Cast iron is classified in to fire basic types: each type is generally based on graphite morphology as following: Read more

A sand casting is also divided resin sand casting and green sand casting.  sand casting is produced when molten metal is poured at atmospheric pressure into a cavity formed in a compacted molding sand. In typical ferrous casting, the mold would be bonded with 6 to 8 percent western bentonite mulled with 2 to 3 percent water. Patterns would be reusable, but the sand molds would be broken from the casting after the solidified casting had cooled sufficiently. The sand would be returned to the muller for recycling by mulling with some new clay and water to reactivate the old clay. Sand moulds define the external geometry of a casting, whereas cores define the interior or undercuts.

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The sand casting comparison : green sand casting with resin sand casting; investment casting compare.