| 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.55 |
| NO.25 | NO.45 | NO.60 | ||||||
| Germany | DIN 1691 | GG10 | GG15 | GG20 | GG25 | GG30 | GG35 | GG40 |
| 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 | FGL400 |
| UK | BS 1452 | 100 | 150 | 200 | 250 | 300 | 350 | – |
| India | IS 210 | – | FG150 | FG200 | FG260 | FG300 | FG350 | FG400 |
| Spain | UNF | – | FG15 | FG20 | FG25 | FG30 | FG35 | – |
| Belgium | NBN 830-01 | FGG10 | FGG15 | FGG20 | FGG25 | FGG30 | FGG35 | FGG40 |
| Australia | AS 1830 | – | T150 | T220 | T260 | T300 | T350 | T400 |
| Sweden | SS 14 01 | O110 | O115 | O120 | O125 | O130 | O135 | O140 |
| Norway | NS11 100 | SJG100 | SJG150 | SJG200 | SJG250 | SJG300 | SJG350 | – |
| Min. Tensile Strength (Mpa) | 100 | 150 | 200 | 250 | 300 | 350 | – | |
How to choose the right mateiral grade?
G100:
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.
G150:
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
G200 and G250:
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.
G300 and G350
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.
