EN-GJS-400-15 (GGG40) is the same material your supplier may list as ASTM A536 60-40-18 or JIS FCD400. This page maps the designations across standards and gives the ISO K-group machining starting point, brand-neutral.
| System | Designation |
|---|---|
| EN (EU) | EN-GJS-400-15 (GGG40) |
| Werkstoffnummer | EN-JS1030 |
| AISI / ASTM / UNS (US) | ASTM A536 60-40-18 |
| JIS (Japan) | FCD400 |
Compiled from the public standard designation systems (EN 10027, SAE/AISI, ASTM, UNS, JIS). Entries marked “nearest” are the closest commonly-cited counterpart, not a drop-in equivalent. Always verify against the material certificate.
Ferritic ductile iron: tougher and stringier than grey iron, closer to steel in the cut. Lower half of the K range and a tougher edge line than you would pick for GJL.
| ISO group | Starting Vc (coated carbide, turning) | Feed fn |
|---|---|---|
| K K · Cast iron | 100–250 m/min · 330–820 sfm | 0.2–0.5 mm/rev · .008–.020 ipr |
Group-level starting range from our speeds & feeds guide; convert to RPM with the speeds & feeds calculator. Condition, subgroup and operation shift the number — the material page has the detail: ISO K · Ductile (nodular) iron.
Related materials: EN-GJS-600-3 / A536 80-55-06
EN-GJS-400-15 (GGG40) (Werkstoffnummer EN-JS1030) corresponds to ASTM A536 60-40-18. In JIS terms the counterpart is FCD400.
It is an ISO K-group material, so the starting window is 100–250 m/min · 330–820 sfm at 0.2–0.5 mm/rev · .008–.020 ipr for coated-carbide turning, adjusted for condition and operation. For a grounded, brand-neutral pick — grade, geometry and cutting data across 13 brands — ask the advisor.
They designate the same composition under different systems, but the drawing standard governs: certificates, tolerances and delivery-condition requirements differ between standards even for equivalent chemistry. Substitute only with the certificate in hand.
Knowing the material is half the job; picking the grade and cutting data for the operation is the other half. That is what the advisor does, grounded in catalog data and honest when there is no verified match.