Gray Iron vs Ductile (GS) -valimot Ranskassa — Ostajan tarkistuslista
17.7.2026
French foundries often describe iron families with local shorthand: fonte, FGL, Fontes GS. For European purchasing teams, the distinction between grey iron and ductile (spheroidal graphite / GS) drives mechanical performance, wall thickness strategy and machining allowances.
Mitä hakemisto voi kertoa
In StålFe’s iron category, filter and open profiles to see whether public federation fields mention grey iron, GS/ductile, or only a generic “fonte” tag. Many members under-declare the split — treat missing GS language as a question for the RFQ, not proof of absence.
Ostajan tarkistuslista
Metallurgy & grades
- Target EN grades (or customer equivalent) and hardness windows.
- Nodulaarisuus/matriisivaatimukset sitkeille ohjelmille.
- Lämpökäsittely-odotukset (valettu vs. normalisoitu/karkaistu).
Sopiva prosessi
- Vihreä hiekka vs kemiallisesti sidottu pinta- ja mittaluokka.
- Shell / Croning when thinner sections or better surface are required — see shell moulding.
- Ydin monimutkaisuus ja alileikkaukset, jotka pakottavat kylmälaatikko- tai furaanireittejä.
Machining & finishing
- Oma käyttö vs kumppanikonepajat.
- Stock allowances aligned to ISO 8062 thinking.
Dokumentaatio
- EN 10204 3.1 / 3.2 scope — certificate guide.
- NDT class for safety or pressure parts — NDT handbook.
Syvä lukeminen
CTA
Shortlist iron houses in the directory, then request a quote with grade, CT class and certificate level explicit on page one of the RFQ.