Investment Casting Foundry | Sand Casting

Stainless Steel Castings, Grey Iron Castings, Ductile Iron Castings

Grey Iron Casting Machinery Part by Investment Casting

Short Description:

Cast Steel: Grey Cast Iron, GG20/EN-GJL-200

Casting Process: Lost Wax Investment Casting + Machining

Unit Weight of Casting: 21.60 kg

Available Surface Treatment: Painting, Anodizing, Passivation, Electroplating, Zinc-plating, Hot-Zinc-Plating, Polishing, Electro-Polishing, Nickel-Plating, Blackening, Geomet, Zintek

Heat Treatment: Quenching, Tempering, Normalizing, Carburization, Nitriding


China OEM custom gray cast iron casting machinery part produced by lost wax investment casting with CNC machining and surface treatment services. We could provide 3.1 Material Certificate of the casting metal according to EN 10204 if you need.  Available inspection methods: dimension testing by CMM, non-destructive testing, chemical composition, mechanical properties, hardness testing, static balancing, dynamic balancing, air pressure and water pressure. 

Product Detail

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China OEM custom gray iron castings produced by lost wax precision investment casting process. 

What Are The Investment Castings Used For?
Investment castings are widely used in pumps and valves, automobile, trucks, hydraulics, forklift trucks and many other industries. Because of their exceptional casting tolerance and exellent finish, the lost wax castings are used more and more. Especially, the stainless steel investment castings play a vital important role in the shipbuilding and boats because they have strong anti-rust performance.

Casting Tolerance Could Reached by Investment Casting:
According to the different binder materials used for making the shell, the investment casting could be divided into silica sol casting and water glass casting. The silica sol investment casting process have better Dimensional Casting Tolerances (DCT) and Geometrical Casting Tolerances (GCT) than water glass process. However, even by same casting process, the Tolerance Grade will be different from each cast alloy due to their various castability. Our foundry would like to talk with you if you have special request on the required tolerances. Here in the following are the general tolerances grade we could reach both by silica sol casting and water glass casting processes separately:
✔ DCT Grade by Silica Sol Lost Wax Casting: DCTG4 ~ DCTG6
✔ DCT Grade by Water Glass Lost Wax Casting: DCTG5 ~ DCTG9
✔ GCT Grade by Silica Sol Lost Wax Casting: GCTG3 ~ GCTG5
✔ GCT Grade by Water Glass Lost Wax Casting: GCTG3 ~ GCTG5

gray iron investment casting manufacturer

Gray Iron Material Grades
Country Standard Equivalent Grades of Grey Iron (Gray Cast Iron)
ISO ISO 185 100 150 200 250 300 350
China GB 9439 HT100 HT150 HT200 HT250 HT300 HT350
USA ASTM A48 - NO.20 NO.30 NO.35 NO.40 NO.50
NO.25 NO.45
Germany DIN 1691 GG10 GG15 GG20 GG25 GG30 GG35
European EN 1561 EN-GJL-100 EN-GJL-150 EN-GJL-200 EN-GJL-250 EN-GJL-300 EN-GJL-350
Japan JIS G5501 FC100 FC150 FC200 FC250 FC300 FC350
Italy UNI 5007 G10 G15 G20 G25 G30 G35
France NF A32-101 - FGL150 FGL200 FGL250 FGL300 FGL350
UK BS 1452 100 150 200 250 300 350
India IS 210 - FG150 FG200 FG260 FG300 FG350
Spain UNF - FG15 FG20 FG25 FG30 FG35
Belgium NBN 830-01 FGG10 FGG15 FGG20 FGG25 FGG30 FGG35
Australia AS 1830 - T150 T220 T260 T300 T350
Sweden SS 14 01 O110 O115 O120 O125 O130 O135
Norway NS11 100 SJG100 SJG150 SJG200 SJG250 SJG300 SJG350
Min. Tensile Strength (Mpa) 100 150 200 250 300 350
RMC, a China iron foundry, is producing various grey iron casting products for overseas customers in USA, Australia, UK, Spain, Germany, Norway, Finland, Russia and Italy. Production according to standards ASTM A48, A536; DIN 1691, 1693; ISO 185, 1083; EN 1561, 1563; DIN 1691, 1693; AS 1830, 1831; JIS, UNI, NF, BS, UNF, NBN, AS, SS, NS. Material grades including:ISO185: 100 150 200 250 300
ASTM A48: NO.20 NO.25 NO.30 NO.35 NO.40 NO.45
DIN 1691: GG10 GG15 GG20 GG25 GG30
EN 1561: EN-GJL-100 EN-GJL-150 EN-GJL-200 EN-GJL-250 EN-GJL-300
BS 1452: 100 150 200 250 300
AS 1830: T150 T220 T260 T300Production Process:
Sand Casting, Automatic Molding, Machine Molding, Shell Molding, Green Sand Casting, Resin Sand Casting
Gray Iron Applications
The following is the common application for each degree of grey cast iron for your reference.
HT100 (GG10, EN-GJL-100):
For small loads, the friction and wear no special requirements for important castings, such as protective cover, cover, oil pan, hand wheels, frame, floor, hammer, small handle, etc.
HT150 (GG15, EN-GJL-150):
Under moderate load of castings, such as the base, frame, box, knife, bed, bearing seat, table, wheels, cover, pump, valve, pipe, flywheel, motor blocks and other
HT200 (GG20, EN-GJL-200):
Requirements withstand greater load and a certain degree of tightness or corrosion resistance of the more important castings such as cylinder, gear, base, flywheels, bed, cylinder block, cylinder liner, piston, gear box, brake wheel, coupling Plate, medium pressure valve, etc.
HT300 (GG30, EN-GJL-300):
Under high load, wear and high air tightness important castings, such as heavy machine tools, shears, presses, automatic lathe bed, frame, frame, high-pressure hydraulic parts, piston rings, force larger gear, Cams, bushings, large engine crankshaft, cylinder block, cylinder liner, cylinder head, etc.
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