High Quality Steel Investment Casting - Grey Iron Casting Machinery Part by Investment Casting – RMC Foundry Detail:
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 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 |
Austria | |||||||
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 |
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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. |
Product detail pictures:

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Our firm since its inception, normally regards item top quality as company life, constantly make improvements to generation technology, improve product excellent and repeatedly strengthen organization total good quality management, in strict accordance with the national standard ISO 9001:2000 for High Quality Steel Investment Casting - Grey Iron Casting Machinery Part by Investment Casting – RMC Foundry, The product will supply to all over the world, such as: Slovenia , Azerbaijan , Johannesburg , We now have established long-term, stable and good business relationships with many manufacturers and wholesalers around the world. Currently, we've been looking forward to even greater cooperation with overseas customers based on mutual benefits. You should feel free to contact us for more details.

As a veteran of this industry, we can say that the company can be a leader in the industry, select them is right.

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