Ductile (nodular) iron. Rm>=400 MPa, A>=15%. Combines castability of cast iron with mechanical properties approaching mild steel.
EN-GJS-400-15 (formerly GGG-40) per EN 1563 is the most widely used ductile iron grade. Graphite spheroids eliminate stress concentration giving 400 MPa tensile strength and 15% elongation — comparable to low-carbon steel while retaining cast iron castability and cost advantages.
| Standardno tijelo | Oznaka | Zemlja / Region | Napomena |
|---|---|---|---|
| EN | EN-GJS-400-15 | European Union | |
| ISO | ISO 1083 Grade 400-15 | International | |
| DIN | GGG-40 | Germany | Obsolete -> EN |
| ASTM | A536 Grade 60-40-18 (nearest) | USA | |
| BS | 350/22 | United Kingdom | |
| JIS | FCD400 | Japan | |
| GOST | VCh40 (VCh40) | Russia / CIS | |
| UNI | GS 40-15 | Italy | |
| NF | FGS 400-15 | France | |
| SS | SS0717 | Sweden | |
| PN | GJS-400-15 | Poland | |
| CSN | 42 2304 | Czech Republic | |
| SAE | J434 Grade D4018 | USA | |
| UNS | F32800 (nearest) | USA (UNS) | |
| GB | QT400-15 | China | |
| JUS | Kug.400-15 | Yugoslavia / Serbia | Spheroidal graphite cast iron, ferritic; JUS B.H2.010 |
| # | Standardno tijelo | Oznaka | Zemlja / Region | Napomena |
|---|---|---|---|---|
| 1 | EN | EN-GJS-400-15 | European Union | — |
| 2 | ISO | ISO 1083 Grade 400-15 | International | — |
| 3 | DIN | GGG-40 | Germany | Obsolete -> EN |
| 4 | ASTM | A536 Grade 60-40-18 (nearest) | USA | — |
| 5 | BS | 350/22 | United Kingdom | — |
| 6 | JIS | FCD400 | Japan | — |
| 7 | GOST | VCh40 (VCh40) | Russia / CIS | — |
| 8 | UNI | GS 40-15 | Italy | — |
| 9 | NF | FGS 400-15 | France | — |
| 10 | SS | SS0717 | Sweden | — |
| 11 | PN | GJS-400-15 | Poland | — |
| 12 | CSN | 42 2304 | Czech Republic | — |
| 13 | SAE | J434 Grade D4018 | USA | — |
| 14 | UNS | F32800 (nearest) | USA (UNS) | — |
| 15 | GB | QT400-15 | China | — |
| 16 | JUS | Kug.400-15 | Yugoslavia / Serbia | Spheroidal graphite cast iron, ferritic; JUS B.H2.010 |
| Element | Simbol | Min % | Max % | Tipično % |
|---|---|---|---|---|
| Carbon (total) | C | 3.4000 | 3.8000 | 3.6000 |
| Silicon | Si | 2.0000 | 3.0000 | 2.5000 |
| Manganese | Mn | — | 0.5000 | 0.2500 |
| Phosphorus | P | — | 0.0500 | — |
| Sulphur | S | — | 0.0200 | — |
| Magnesium | Mg | 0.0300 | 0.0700 | 0.0500 |
| Stanje | Šifra | Rm min MPa | Rm max MPa |
Re min MPa | Re max MPa |
A₅ min % |
Z % |
KV J |
HB min | HB max | HRC min | HRC max | E GPa |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| As Cast — Ferritic | GJS-400-15 | 400 | 500 | 250 | — | 15.0 | — | — | — | 200 | — | — | 170.0 |
| Annealed (fully ferritic) | +A | 370 | 470 | 220 | — | 18.0 | — | — | — | 190 | — | — | 170.0 |
| Rashladni fluid | Dry or light air blast; avoid water shock |
| Oblici strugotine | Short broken chips (good control) |
| Rezni alat | Carbide K10/K20; CBN for hardened ADI |
| Površinska hrapavost | Ra 0.8-3.2 um |