DANS 1.4307 Acier inoxydable: Guide des propriétés, Usages & Fabrication

If you need a stainless steel that resists intergranular corrosion—especially after welding—DANS 1.4307 acier inoxydable is an excellent choice. As the low-carbon version of EN 1.4301 (AISI 304), it’s perfect for industries like food processing and pharmaceuticals where corrosion resistance and hygiene matter most. This guide covers everything from its specs to real-world applications, helping you make informed decisions for your projects.

1. DANS 1.4307 Acier inoxydable: Aperçu & Spécifications clés

Let’s start with the basics ofDANS 1.4307 acier inoxydable—its composition, normes, and core properties.

Composition chimique

LeDANS 1.4307 composition is defined by its low carbon content (max 0.03%), which sets it apart from EN 1.4301. It also contains 18–20% chromium (pour la résistance à la corrosion) and 8–12% nickel (for its austenitic structure), plus small amounts of manganese (max 2.0%) and silicon (max 1.0%). This low-carbon blend is the key to its resistance to intergranular corrosion.

Industry Standards & Equivalents

DANS 1.4307 follows strict global standards to ensure consistency:

• 1.4307 AISI 304L equivalent: It’s the direct European counterpart to AISI 304L, so they can be used interchangeably in most projects.
• 1.4307 US S30403: The Unified Numbering System identifier, used in North America.
• 1.4307 ASTM A240: ASTM standard for plates and sheets, et 1.4307 DANS 10088-2: European standard for flat products (Feuilles / plaques).

Physique & Propriétés mécaniques

Below is a table of critical properties that makeDANS 1.4307 acier inoxydable ideal for corrosion-sensitive applications:

Exemple: A dairy processor usesDANS 1.4307 acier inoxydable for milk storage tanks. Itslow-carbon austenitic structure resists corrosion from milk acids, and its smooth surface is easy to clean—meeting food safety standards.

2. Résistance à la corrosion & Performance environnementale

DANS 1.4307 acier inoxydable’s biggest advantage is its strong corrosion resistance, especially against intergranular corrosion.

Key Corrosion Behaviors

• 1.4307 Immunité de corrosion intergranulaire: Its low carbon content prevents carbide precipitation at grain boundaries, so it won’t corrode along grain edges—even after welding.
• 1.4307 sensitization prevention: Unlike EN 1.4301, it doesn’t become “sensitized” (prone to intergranular corrosion) when heated, making it ideal for welded parts.
• 1.4307 PREN ~18: The Pitting Resistance Equivalent Number (Bois) of ~18 means it handles mild chlorides (Par exemple, indoor plumbing) well.
• 1.4307 atmospheric corrosion: Excellent resistance to dry, humid, and urban air. It’s used for architectural cladding that stays rust-free for decades.

Critical Corrosion Considerations

• 1.4307 chloride pitting resistance: Low risk in clean, low-chloride environments, but avoid high-chloride settings (Par exemple, saltwater pools) — use EN 1.4404 (AISI 316L) for those.
• 1.4307 crevice corrosion threshold: Avoid tight crevices (Par exemple, unsealed bolts) in wet areas—they can trap moisture and cause pitting.
• 1.4307 seawater limits: Can handle occasional seawater splashes (Par exemple, coastal building trim) but not full submersion.
• 1.4307 contre 1.4301 comparaison de corrosion: Both offer similar general corrosion resistance, but EN 1.4307 is far better at resisting intergranular corrosion after welding.

Étude de cas: A pharmaceutical company usesDANS 1.4307 acier inoxydable for drug mixing tanks. The tanks are welded, and EN 1.4307’sImmunité de corrosion intergranulaire ensures no rust forms in weld areas—critical for keeping drugs pure.

3. Traitement thermique & Microstructure Stability

Proper heat treatment helps maintainDANS 1.4307 acier inoxydable’s corrosion resistance and microstructure stability.

Common Heat Treatment Processes

Critical Considerations

• 1.4307 Évitement des précipitations en carbure: Its low carbon content means carbide precipitation (which causes intergranular corrosion) is almost impossible—even if heat treatment is slightly off.
• 1.4307 grain growth control: Solution annealing at 1000–1100 °C keeps grain sizes small (ASTM 5–8), balancing strength and ductility.
• 1.4307 cold working strain hardening: Travail au froid (like bending) increases hardness, but it won’t reduce corrosion resistance—unlike some other grades.
• 1.4307 magnetic permeability after cold work: It may become slightly magnetic after heavy cold working, but this doesn’t affect its corrosion resistance or strength.

Exemple: A manufacturer of heat exchanger tubes usesDANS 1.4307 acier inoxydable. They solution anneal the tubes at 1050 °C and water quench to ensureÉvitement des précipitations en carbure—the tubes resist corrosion from coolants for 10+ années.

4. Soudage, Fabrication & Directives d'usinage

DANS 1.4307 acier inoxydable is easy to weld and fabricate, making it popular for complex parts.

Conseils de soudage

• 1.4307 weldability rating: Excellent (rated 9/10)—it welds well with TIG, MOI, and stick methods.
• 1.4307 Aucun préchauffage requis: Unlike martensitic grades (Par exemple, 410), it doesn’t need preheating, saving time and money.
• 1.4307 filler metal ER308L: Use this low-carbon filler to match the base metal’s corrosion resistance—avoid high-carbon fillers like ER308.
• 1.4307 post-weld cleaning passivation: While not mandatory (thanks to its intergranular corrosion immunity), passivation (with nitric acid) boosts general corrosion resistance by 30–40%.

Usinage & Fabrication

• 1.4307 Vitesses et flux d'usinage: Use speeds of 150–250 m/min (turning) and feeds of 0.1–0.3 mm/rev—avoid overheating, which can reduce tool life.
• 1.4307 La vie de l'outil avec des inserts en carbure: Carbide tools last 2–3x longer than high-speed steel (HSS) when machining EN 1.4307.
• 1.4307 Dessin profond de formabilité: Excellent—its austenitic structure lets it be deep-drawn into shapes like food cans or sink basins without cracking.
• 1.4307 techniques de contrôle de la distorsion: Use clamps during welding and uniform heating during forming to minimize distortion.

Étude de cas: A kitchen appliance maker usesDANS 1.4307 acier inoxydable for dishwasher interiors. They deep-draw the metal into curved shapes (thanks to itsDessin profond de formabilité) and weld seams without preheating—producing 10,000+ interiors per month with no defects.

5. Formulaires de produit, Tailles & Chaîne d'approvisionnement

DANS 1.4307 acier inoxydable is available in many forms to fit different applications—here’s what you can find.

Formulaires de produit communs

• 1.4307 épaisseurs de plaque en acier inoxydable: 3–200 mm (used for chemical storage tanks, parties structurelles).
• 1.4307 graphique de jauge en feuille: 26 jauge (0.45 MM) à 8 jauge (4.0 MM) (used for kitchen appliances, pharmaceutical equipment).
• 1.4307 seamless pipe EN 10216-5: Sizes ½–24 inches (used for pharmaceutical and food processing piping).
• 1.4307 welded tube EN 10217-7: Sizes ½–12 inches (used for plumbing, brewery lines).
• 1.4307 Bars de la barre ronde: Diameters 5–300 mm (used for fasteners, arbres).

Conseils de chaîne d'approvisionnement

• 1.4307 tailles d'angle: Common sizes include 20x20x3 mm to 100x100x10 mm (used for structural supports in food facilities).
• 1.4307 Largeurs de fente de bobine: 50–1600 mm (used for mass-produced parts like heat exchanger fins).
• 1.4307 Tolérances de barres plates: Most suppliers offer tolerances of ±0.1 mm for thickness—ideal for precision parts like pharmaceutical equipment components.
• 1.4307 Fournisseurs à barres creuses: Look for ISO 9001-certified suppliers to ensure consistent wall thickness and corrosion resistance.

6. Applications de l'industrie & Études de cas

DANS 1.4307 acier inoxydable is used in industries where corrosion resistance (Surtout après le soudage) and hygiene are critical.

Applications clés

• 1.4307 équipement de transformation des aliments: Mixers, conveyors, and storage bins—its corrosion resistance handles food acids, and it’s easy to sanitize.
• 1.4307 brewery tanks: Stores beer and wort without adding metallic tastes—resists corrosion from hops and yeast.
• 1.4307 pharmaceutical piping: Transports drugs and solvents—meets strict hygiene standards and resists chemical corrosion.
• 1.4307 dairy processing: Milk tanks and pipelines—its smooth surface prevents bacterial growth.
• 1.4307 cryogenic vessels: Stores liquids at very low temperatures (down to -196 ° C)—its austenitic structure stays ductile even in cold.

Exemple du monde réel: A brewery usesDANS 1.4307 acier inoxydable for 10,000-liter fermentation tanks. The tanks are welded, and EN 1.4307’ssensitization prevention ensures no rust forms in welds. Après 5 années d'utilisation, the tanks still look new and produce consistent-tasting beer.

Yigu Technology’s Perspective on EN 1.4307 Acier inoxydable

À la technologie Yigu, we supplyDANS 1.4307 acier inoxydable to food, pharmaceutique, and dairy clients globally. Its low-carbon design and intergranular corrosion immunity make it perfect for welded parts like tanks and piping. We offer custom cuts (Par exemple, mirror finish sheets for architectural projects) and provide certification documents to meet industry standards. For food clients, we ensure our EN 1.4307 meets FDA requirements, so their equipment is safe and durable.

FAQ About EN 1.4307 Acier inoxydable

1. Is EN 1.4307 stainless steel magnetic?
   No—unless it’s heavily cold-worked. Its 1.4307 low-carbon austenitic structure is non-magnetic, but heavy bending or stamping can make it slightly magnetic. This doesn’t affect its corrosion resistance or strength.
2. When should I use EN 1.4307 instead of EN 1.4301?
   Use EN 1.4307 if your project involves welding. EN 1.4307’s Immunité de corrosion intergranulaire means it won’t corrode along welds, while EN 1.4301 may become sensitized and prone to intergranular corrosion after welding.
3. Can EN 1.4307 be used in high-temperature applications?
   Yes—it has good 1.4307 oxidation resistance jusqu'à 870 ° C. It’s used for heat exchanger tubes and oven parts, but avoid temperatures above 900 °C for long periods—this can reduce its strength.