Sand Casting, Investment Casting and Die Casting in China

Carbon Steel Casting

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 Compare

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

Index
USA
China
France
Germany
Japen
Sweden
England
1
UNS S31803
00Cr22Ni5Mo3N
UR 45N. UR45N+
W NR. 1.4462
DP8
SAF 2205 (SS2377)
 
2
UNS S31500
00Cr18Ni5Mo3Si2
 
W NR. 1.4417
DP1
3RE60 (SS2376)
 
3
UNS S32550
0Cr25Ni6Mo3CuN
UR 52N+
W NR. 1.4507
   
Ferralium 255
4
UNS S31200
00Cr25Ni6Mo2N
         
5
UNS S31260
00Cr25Ni7Mo3WCuN
 
W NR. 1.4501
DP3(SUS329J2L)
 
Zeron 100
6
UNS S32304
 
UR35N
W NR. 1.4362
DP11
SAF 2304 (SS2327)
 
7
UNS S32750
 
UR42N
W NR. 1.4410
 
SAF 2507
 
8
UNS S32900
0Cr26Ni5Mo2
 
W NR. 1.4460
DP6(SUS329J1)
10RE51 (SS2324)
 
9
UNS S32950
           

Chinese Iron Casting

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/A995M for Castings, Austenitic-Ferritic (Duplex) Stainless Steel

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 Property

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.

  Read more

ISO 8062:1994 Castings

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

Cast Iron

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

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

Sand Casting Process

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.

Read more

The sand casting comprison

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

sand casting process production way order quantity quality price weight(referance)
green sand casting better for iron and light alloy aluminum copper alloy making mould by hands smaller pass no requirement
making mould by lift-machine more normal under 20kg
making mould by simple-machine middle superior under 30kg
making mould by production-line larger excellence under 100kg
Resin sand casting better for iron,normal for steel baking smaller and middle superior over 5kg
no baking smaller and middle superior over 10kg
no baking by production-line larger superior over 30kg
Sodium silicate bonded sand casting better for steel baking smaller and middle normal over 5kg
no baking smaller and middle pass over 10kg
dry mould casting better for iron and light alloy baking smaller and middle pass over 50kg

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Sand Casting, Investment Casting and Die Casting in China