Material: Ductile Iron (QT450) Process: Green Sand Casting Weight: 21 kg Application: Valve Parts
As a ductile cast iron parts manufacturer and foundry, RMC can pour iron castings using our No-bake process up to ten tons finished weight in gray iron castings and ductile iron castings, and up to five tons in steel castings and stainless steel castings.
As a ductile cast iron parts manufacturer and foundry, RMC can pour iron castings using our No-bake process up to ten tons finished weight in gray iron castings and ductile iron castings, and up to five tons in steel castings and stainless steel castings. RMC can produce casting parts in a wide variety of materials, including grey iron, ductile iron, stainless steel, carbon steel, wear-resistant steel, and heat-resistant steel based on different standards from China and overseas. Ductile cast iron, which is represent a group of cast iron, also called nodular iron. Nodular cast iron obtains nodular graphite through spheroidization and inoculation treatment, which effectively improves the mechanical properties of the cast iron, especially the plasticity and toughness, so as to obtain higher strength than carbon steel.
Ductile iron castings have better shock absorption performance than carbon steel, while carbon steel castings have much better weldability. And to some extent, the ductile iorn castings could have some performances of resistanting wear and rust. So the ductile iron casting could be used for some pump housings or water supply systems. However, we still need to make precautions for protecting them from wearing and rust.
Ductile iron is not a single material but is part of a group of materials which can be produced to have a wide range of properties through control of the microstructure. The common defining characteristic of this group of materials is the shape of the graphite. In ductile irons, the graphite is in the form of nodules rather than flakes as it is in grey iron. The sharp shape of the flakes of graphite create stress concentration points within the metal matrix and the rounded shape of the nodules less so, thus inhibiting the creation of cracks and providing the enhanced ductility that gives the alloy its name. So generally speaking, if the ductile iron could meet your requirements, the ductile iron could be your first choice, instead of carbon steel for your castings.
Casting Capabilities for at RMC Foundry
|Casting Process||Annual Capacity / Tons||Main Materials||Casting Weight||Dimensional Tolerance Grade (ISO 8062)||Heat Treatment|
|Green Sand Casting||6000||Gray Cast Iron, Ductile Cast Iron, Cast Al, Brass, Cast Steel, Stainless Steel||0.3 kg to 200 kg||CT11~CT14||Normalization, Quenching, Tempering, Annealing, Carburization|
|Resin Coated Sand Casting (Shell Casting)||0.66 lbs to 440 lbs||CT8~CT12|
|Lost Wax Investment Casting||Water Glass Casting||3000||Stainless Steel, Carbon Steel, Alloy Steel, Brass, Aluminium, Duplex Stainless Steel, Cast Iron||0.1 kg to 50 kg||CT5~CT9|
|0.22 lbs to 110 lbs|
|Silica Sol Casting||1000||0.05 kg to 50 kg||CT4~CT6|
|0.11 lbs to 110 lbs|
|Lost Foam Casting||4000||Gray Iron, Ductile Iron, Alloy, Carbon Steel, Stainless Steel, Brass, Al||10 kg to 300 kg||CT8~CT12|
|22 lbs to 660 lbs|
|Vacuum Casting||3000||Gray Iron, Ductile Iron, Alloy Steel, Carbon Steel, Stainless Steel||10 kg to 300 kg||CT8~CT12|
|22 lbs to 660 lbs|
|High Pressure Die Casting||500||Aluminium Alloys, Zinc Alloys||0.1 kg to 50 kg||CT4~CT7|
|0.22 lbs to 110 lbs|
▶ Capabilities of Sand Casting moulded by hand:
The following is the comparison of the ductile iron from different standards.
|Ductile Iron Comparison||Chemical Composition（％）||Matrix Structure|
|GB/T 1348-1988||ISO 1083:1987(E)||ASTM A536-84(2004)||EN 1563:-1997||JIS G5502-2001||ГОСТ7293||C||Si||Mn||P||S||Mg||RE||others|
|QT400-18||400-18||60-40-18① F32800||GJS-400-18 JS1020||FCD400-18||вч40||3.6-3.8||2.3-2.7||＜0.5||＜0.08||＜0.025||0.03-0.05||0.02-0.03||—||Annealed Ferrite|
|QT400-15||400-15||60-42-10 F32900||GJS-400-15 JS1030||FCD400-15||вч40||3.5-3.6||3.0-3.2||＜0.5||＜0.07||＜0.02||0.04||0.02||—||Annealed Ferrite|
|QT450-10||450-10||65-45-12 F33100||GJS-450-10 JS1040||FCD450-10||вч45||3.4-3.9||2.7-3.0||0.2-0.5||＜0.07||＜0.03||0.06-0.1||0.03-0.1||—||Annealed Ferrite|
|QT500-7||500-7||70-50-05||GJS-500-7 JS1050||FCD500-7||вч50||3.6-3.8||2.5-2.9||＜0.6||＜0.08||＜0.025||0.03-0.05||0.03-0.05||—||Pearlite + Ferrite|
|QT600-3||600-3||80-60-03② F34100||GJS-600-3 JS1060||FCD600-3||вч60||3.6-3.8||2.0-2.4||0.5-0.7||＜0.08||＜0.025||0.035-0.05||0.025-0.045||—||Normalized Pearlite|
|QT700-2||700-2||100-70-03 F34800||GJS-700-2 JS1070||FCD700-2||вч70||3.7-4.0||2.3-2.6||0.5-0.8||＜0.08||＜0.02||0.035-0.065||0.035-0.065||Mo0.15-0.4 Cu0.4-0.8||Mix Microstructure|
|QT800-2||800-2||-||GJS-800-2 JS1080||FCD800-2||вч80||3.7-4.0||＜2.5||＜0.5||＜0.07||＜0.03||—||—||Mo0.39 Cu0.82||Mix Microstructure|
|QT900-2||900-2||120-90-02 F36200||GJS-900-2 JS1090||-||вч90||3.5-3.7||2.7-3.0||＜0.5||＜0.08||＜0.025||0.03-0.05||0.025-0.045||Mo0.15-0.25 Cu0.5-0.7||Lower Bainite|
|① from ASTM A716-2003. ② from ASTM A476/A476M-2000。|
The Sand Casting Facilities at RMC: