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Les différents métaux et alliages utilisés possèdent chacun des propriétés particulières qui confèrent aux pièces réalisées des capacités de résistance mécanique, des degrés de légèreté, de conductivité… différents. Ils sont donc choisis en fonction de la destination de chaque application selon un cahier des charges précis établi avec le client.

Les métaux ferreux :
des alliages de fer et de carbone, associés à d’autres éléments

Les aciers : alliages de fer et de carbone (< 0,6%)

Les aciers sont des alliages de fer et de carbone dont le taux est en général inférieur à 0,6% présentant d'excellentes caractéristiques mécaniques. L'augmentation du pourcentage de carbone améliore la dureté, la résistance à la rupture, la limite élastique, la résistance à la corrosion, la résistance à l'usure et la trempabilité, mais elle diminue la malléabilité, la résilience et la soudabilité.

Les aciers représentent environ 95% des métaux utilisés dans le secteur de la forge, contre 12% de ceux utilisés dans le secteur de la fonderie, et sont classés en 3 grandes familles principales

   Aciers carbone

 

Automobile, Poids lourd, TP, Agricole, outillage à main, coutellerie, arbres de transmission,…

   Aciers faiblement alliés

 

Automobile, Poids lourd, TP, Agricole, coutellerie, arbres de transmission,…

   Aciers fortement alliés :

   Aciers inox

   Aciers réfractaires

   Aciers outils

Chimie, nucléaire, alimentaire, aéro, energie, petrole

 

 

L’ajout d’éléments influence les caractéristiques mécaniques des pièces produites, par exemple :

 

- le Manganèse (Mn) : augmente la limite élastique, la trempabilité et la résistance à l’abrasion

- le Nickel (Ni) : augmente la résistance aux chocs et à la corrosion

- le Silicium (Si) : augmente la limite élastique

- le Tungstène (W) : augmente la résistance à l’usure et à la chaleur

- le Molybdène (Mo) : augmente la résistance à l’usure et à la chaleur

- le Vanadium (V) : augmente la résistance à l’usure et aux déformations

 

Des gammes de caractéristiques mécaniques étendues sont obtenues après traitement thermique.

 

Les fontes : des alliages de fer et de carbone (2,5 à 4%)

Les fontes sont des alliages où le taux de carbone est élevé (2,5 à 4%).

Il s’agit d’un matériau présentant de très bonnes propriétés d’utilisation mais peu d’élasticité à la traction. Cela tient à la présence du carbone sous forme de lamelles de graphite libre qui cristallise dans la matrice métallique, celles-ci créent des amorces de rupture entraînant une certaine fragilité : ces fontes sont dénommées fontes à graphite lamellaire.

Pour améliorer leurs propriétés, on a recours à des éléments d’addition (nickel, chrome ...). Il s’agit alors de fontes dites alliées dont la teneur en carbone est généralement inférieure à 3%.

 

Les fontes à graphite sphéroïdal possèdent des caractéristiques qui dépassent celles de certains aciers, notamment en ce qui concerne leur résistance à la fatigue : cela tient au fait que dans ces fontes le graphite cristallise sous forme de petites sphères et non de lamelles.

 

 

Fonte à graphite lamellaire (GL)

+ Bonne usinabilité, rigidité, résistance à la corrosion et à la compression, bonne absorption des vibrations, excellente coulabilité
- Fragile comparée aux aciers et à la fonte GS

Machines-outils, pièces mécaniques, chauffage, contrepoids, automobile

Fonte à graphite sphéroïdal (GS)

+ Caractéristiques mécaniques élevées, grande ductilité, bonne usinabilité en structure ferritique et assez bonne en perilitique, bonne coulabilité et soudabilité, bonne élasticité

Pièces mécaniques, pièces automobiles (pièces de liaison au sol, pièces de sécurité : composants moteurs type vilebrequins, freinage, freinage, supports de fusée de roue…), pièces ferroviaires, agricoles, hydrauliques, pour travaux publics, tuyaux d’adduction d’eau

Fonte à graphite vermiculaire (GV)

+ Avec un graphite dont la forme est comprise entre les lamelles et les sphères, la FGV allie les avantages de la FGL sans ses inconvénients (Fragilité)

-  La principale difficulté est la maîtrise reproductibilité de sa structure

Transports terrestres : carters-cylindres et culasses de gros moteurs (2,5 à 7 litres de cylindrée) en véhicules particuliers, et  camion

 

 

Métaux non-ferreux :
alliages ne comprenant pas de fer, ou dans des proportions très faibles

Cuivres et alliages cuivreux

Le cuivre est le premier métal travaillé par l'homme avec l'or. Il est facile à travailler, ses alliages sont utilisés en forge comme en fonderie, et ses usages très diversifiés. On peut citer en principales caractéristiques une excellente résistance à la corrosion et très bonne conductibilité électrique.

Bronze (Cuivre-Etain)

+ Conductivité électrique et thermique parmi les plus élevées

Excellente coulabilité

Faible dureté l’usinage et la découpe

Résistance à l’usure (propriétés anti-frottement)

Amagnétisme

Soudabilité et aptitude au brasage

Aptitude au polissage et aux traitements de décoration

Bon coefficient de dilatation

Bonne résistance mécanique et dureté

Résistance à la corrosion particulièrement en milieu marin

Caractéristiques mécaniques élevées

Cloches, équipements électriques et électroniques, connectique, échangeurs de chaleur, robinetterie industrielle et sanitaire, plomberie, construction navale aérospatiale et aéronautique, pièces d’étanchéité en milieu marin, échangeurs marins, énergie nucléaire, automobile, ferroviaire, bâtiment, plomberie

Laiton (Cuivre-Zinc)

Cupro-aluminiums (Cuivre-Aluminium)

 

Alliages légers et ultralégers

 

Les alliages légers sont élaborés à partir d’aluminium et les alliages ultra légers à partir de magnésium. Les principales propriétés de l'aluminium sont sa légèreté, sa bonne résistance à l'oxydation et sont excellente conductivité électrique et thermique.

 

Alliages d’aluminium et de silicium

+ Légèreté, bonne coulabilité, usinabilité et propriétés d'aspect

Automobile, aéronautique et spatial, mécanique, chimie

Alliages d’aluminium et de cuivre

+ Bonnes caractéristiques mécaniques, bonne usinabilité
- Mauvaise tenue à la corrosion, criquabilité importante

Tuyauteries, raccords

Alliages d’aluminium et de magnésium

+ Bonne usinabilité et grande résistance à la corrosion
- Coulabilité moins bonne et criquabilité importante

Piston, aubes de compresseurs

 

Alliages de zinc et zamak

Les alliages de zinc sont le plus souvent alliés à l’aluminium (de 4 à 30%) et contiennent parfois de faibles additions de magnésium (de 0,012 à 0,06%) et de cuivre (jusqu’à 3%).

 Le plus couramment utilisé (95% du marché) est appelé zamak (zinc pur à 99,995%).

 Sa coulabilité et sa bonne pénétration en font un alliage adapté à la coulée sous-pression qui permet d’obtenir des pièces minces et/ou de configuration compliquée.

 

Zamak (Aluminium, Magnésium, cuivre)

+ Très bonne coulabilité, stabilité dimensionnelle, résistance à la corrosion

Automobile, bâtiment, décoration, électricité, électronique, parfumerie

 

Les super-alliages

Ces alliages haute performance présentent d'excellentes résistances mécaniques, notamment en fatigue thermique, corrosion à chaud ou torsion

 

Hastelloy

Inconel

Monel

+ Bonne résistance mécanique (pression, torsion, fatigue), résistance à la corrosion, grande résistance à hautes températures

Aéronautique (turbines, turboréacteurs), sport automobile, marine

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News
September 29 2026

European Foundry Industry Sentiment improves in August 2026

European Foundry Industry Sentiment improves in August 2026 – expectations strengthen, but major differences between foundry segments remain.
The European foundry industry recorded a further improvement in business sentiment in August 2026. The European Foundry Industry Sentiment Indicator (FISI) increased to 97.0 points, up from 96.0 in July, continuing the gradual recovery seen after the weakness earlier this year. Nevertheless, FISI remains below the benchmark level of 100, underlining that the recovery of the European foundry industry is still incomplete and highly uneven across individual casting segments. The August data show a particularly strong contrast between steel foundries, which continue to face difficult current conditions, and the much stronger non-ferrous sector.

The FISI is the earliest available composite indicator providing information on the performance of the European foundry industry. It is published monthly by EFF - European Foundry Federation and is based on survey responses from the European foundry industry. EFF members assess both the current business situation and their expectations for the next six months.
European manufacturing environment continues to improve
The August FISI results should be viewed against a more encouraging manufacturing environment. European manufacturing also strengthened during August. The final Eurozone Manufacturing PMI reached 52.7, up from 51.9 in July and its highest level since May 2022. The improvement was supported by stronger manufacturing activity in Germany, although conditions remained uneven across individual European economies.
The Business Climate Indicator (BCI) for the euro area stood at -0.22 in August, compared with -0.19 in July. Although it therefore remains in negative territory, the longer-term chart shows that the business climate has recovered considerably from the lows recorded in 2024. The BCI is published by the European Commission and assesses conditions in euro-area manufacturing based on production trends, order books, export order books, stocks and production expectations.
Taken together, FISI at 97.0, BCI at -0.22 and European Manufacturing PMI at 52.7 present a mixed but gradually improving picture. Manufacturing activity is expanding, while confidence in the European foundry industry is recovering more slowly and remains below its benchmark level.


Iron foundries: current conditions soften, but expectations rebound
The situation of European iron foundries remained mixed in August. The assessment of the current business situation decreased by 0.5 points to 99.5 index points, bringing it just below the benchmark level of 100.
At the same time, however, expectations improved significantly. The index measuring expectations for the next six months increased by 2.7 points to 88.0.
This represents a notable change compared with July, when the current-situation indicator had improved to 100.0 while six-month expectations declined to 85.3. The August results therefore suggest that, although current market conditions have softened slightly, iron foundries have become more confident about the months ahead.
Nevertheless, expectations remain well below 100. This indicates continued caution regarding future order intake and demand from important customer industries. Iron foundries remain particularly exposed to developments in automotive production, mechanical engineering, commercial vehicles, agricultural machinery and other industrial sectors.
The August increase in expectations is encouraging, but a sustainable recovery will ultimately depend on stronger orders and higher production volumes across European manufacturing.


Steel foundries: current situation remains very weak, but expectations improve
European steel foundries continue to report the most difficult current conditions among the three major foundry segments. In August, the assessment of the current business situation increased slightly by 0.2 points to 74.5 index points. At the same time, expectations for the next six months increased by 0.6 points to 98.2.
The substantial gap between the current-situation index of 74.5 and expectations of 98.2 is particularly significant. It shows that steel foundries remain under considerable pressure today, but companies expect conditions to improve over the coming six months.
The July figures already showed this contrast, with current conditions at only 74.3 and expectations at 97.6. The August improvement in both indicators is therefore positive, although the extremely low current-situation reading confirms that a meaningful recovery in actual business activity has yet to materialize.
Steel foundries remain dependent on investment-intensive sectors such as heavy machinery, energy, mining, rail, infrastructure and defence. Stronger capital investment and industrial orders will therefore be essential if improved expectations are to translate into higher capacity utilisation and production.

 

Non-ferrous foundries remain the strongest segment
The picture is substantially more positive for European non-ferrous foundries. In August 2026, the assessment of the current business situation increased by 0.4 points to 133.6 index points. Expectations for the next six months strengthened even more, rising by 1.9 points to 150.9.
Both indicators are not only well above the benchmark level but also considerably stronger than those recorded in the iron and steel casting segments. In July, the current-situation indicator stood at 133.2 and expectations at 149.0, meaning that the sector strengthened further in August.
Non-ferrous foundries therefore remain the strongest part of the European foundry industry. The segment continues to benefit from demand connected with lightweight components, electrification, energy technologies and advanced industrial applications.
The particularly high six-month expectations reading of 150.9 indicates strong confidence compared with the ferrous casting sectors and suggests that non-ferrous foundries expect favourable market conditions to continue.
Outlook: recovery is becoming more visible, but remains uneven
The August results provide grounds for cautious optimism. Overall FISI increased from 96.0 to 97.0, while global manufacturing activity remained firmly in expansion territory with a PMI of 52.3. Eurozone manufacturing strengthened further, reaching a PMI of 52.7. At the same time, the BCI remained negative at -0.22, demonstrating that the broader European industrial environment is not yet free of uncertainty.
The differences between individual foundry segments remain striking. Iron foundries are close to the benchmark level in their assessment of current conditions, but their expectations remain subdued. Steel foundries continue to experience particularly weak current business conditions, despite substantially stronger expectations for the coming six months. Non-ferrous foundries, by contrast, report both strong current conditions and very positive expectations.


For European foundries, the key question is now whether improving manufacturing activity and stronger expectations will translate into higher order intake, increased capacity utilisation and stronger investment by customer industries.
The industry continues to face significant structural challenges, including high energy and production costs, geopolitical uncertainty, global competition and uneven demand from key customer sectors. EFF has also highlighted competitiveness issues related to the EU's Carbon Border Adjustment Mechanism (CBAM), particularly the risk that European foundries face higher costs for imported raw materials while many imported finished foundry products remain outside the mechanism's scope.
European foundries are strategic suppliers to the automotive, machinery, energy, railway, aerospace, defence, construction and infrastructure sectors. Maintaining a competitive European foundry industry is therefore essential not only for foundry companies themselves, but also for resilient European industrial supply chains and Europe's long-term industrial competitiveness.
EFF – European Foundry Federation will continue to monitor developments through its monthly European Foundry Industry Sentiment Indicator (FISI), providing market intelligence on current conditions and expectations across the European foundry industry.
 

The FISI – European Foundry Industry Sentiment Indicator – is the earliest available composite indicator providing information on the European foundry industry performance. It is published by EFF every month and is based on survey responses of the European foundry industry. The EFF members are asked to give their assessment of the current business situation in the foundry sector and their expectations for the next six months.
The BCI – Business Climate Indicator – is an indicator published by the European Commission. The BCI evaluates development conditions of the manufacturing sector in the euro area every month and uses five balances of opinion from industry survey: production trends, order books, export order books, stocks and production expectations.
Purchasing Managers' Index (PMI) - in the Euro area is an indicator of the economic health of the manufacturing sector. It is based on such indicators as: new orders, inventory levels, production, supplier deliveries and the employment environment.
Please find the chart enclosed or combined with additional information at eff-eu.org/.
Background information on EFF:
EFF is the umbrella organisation of the national European foundry associations. The organisation, founded in 1953, has 22 European member states and works to promote the economical, technical, legal and social interests of the European foundry industry. At the same time, EFF implements activities which aim at developing national foundry industries and co-ordinating their shared international interests.
EFF represents 4 400 European foundries. Nearly 260 000 employees are generating a turnover of 39 billion Euro. European foundries are recruiting 20 000 workers and engineers per year. The main customer industries are e.g. the automotive, the general engineering and the building industries as well as the electrical engineering industry. No industrial sector exists without using casted components.
Further information at eff-eu.org/ and LinkedIn EFF.
___________________________________________________________________
EFF • European Foundry Federation
Alameda Urquijo 33, 1D, Abando 48008, Bilbao • Spain
info@eff-eu.org
Contact: info@eff-eu.org • eff-eu.org/ • LinkedIn EFF
7/7
EFF Contact:
Witold Dobosz
EFF – European Foundry Federation
mail: info@eff-eu.org
________________________________________

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