EN 1.4404 Acero inoxidable: Full Guide to Properties, Usos & Fabricación

If you need a stainless steel that resists corrosion—especially after welding—in harsh environments, EN 1.4404 acero inoxidable is the ideal choice. As the low-carbon version of EN 1.4401 (Aisi 316), it’s trusted in industries like pharmaceuticals, marina, and food processing. This guide covers everything from its specs to real-world applications, helping you make informed decisions for your projects.

1. EN 1.4404 Acero inoxidable: Descripción general & Especificaciones clave

Let’s start with the basics ofEN 1.4404 acero inoxidable—its composition, estándares, and core properties.

Composición química

ElEN 1.4404 composición is defined by its low carbon content (máximo 0.03%), which prevents intergranular corrosion. It also contains 16–18% chromium (resistencia a la corrosión), 10–14% níquel (austenitic structure), and 2–3% molybdenum (enhanced chloride resistance). Small amounts of manganese (máximo 2.0%) and silicon (máximo 1.0%) complete the blend, creating a metal that balances strength and durability.

Industry Standards & Equivalents

EN 1.4404 follows strict global standards for consistency:

• 1.4404 AISI 316L equivalent: It’s the direct European counterpart to AISI 316L, so they’re interchangeable in most projects.
• 1.4404 EE. UU. S31603: The Unified Numbering System identifier, used in North America.
• 1.4404 ASTM A240 / 1.4404 ASME SA-240: ASTM/ASME standards for plates/sheets, y 1.4404 EN 10088-2: European standard for flat products.

Físico & Propiedades mecánicas

Below is a table of critical properties that makeEN 1.4404 acero inoxidable ideal for corrosion-sensitive applications:

Ejemplo: A pharmaceutical company usesEN 1.4404 acero inoxidable for drug storage tanks. Itslow-carbon austenitic structure prevents intergranular corrosion, keeping drugs pure and meeting FDA standards.

2. Resistencia a la corrosión & Desempeño ambiental

EN 1.4404 acero inoxidable’s biggest advantage is its exceptional corrosion resistance—especially against intergranular and chloride-induced corrosion.

Key Corrosion Behaviors

• 1.4404 intergranular corrosion prevention: Its low carbon content stops carbide precipitation at grain boundaries, so it won’t corrode along grain edges—even after welding.
• 1.4404 chloride stress corrosion cracking immunity: Molybdenum and low carbon make it immune to stress corrosion cracking in chloride environments (P.EJ., saltwater, tanques químicos).
• 1.4404 PREN ~23–25: This high PREN rating means it resists pitting in harsh chloride settings, far better than EN 1.4307 (AISI 304L).
• 1.4404 tasa de corrosión del agua de mar: Menos que 0.1 mm/year in full seawater submersion—ideal for marine parts.

Critical Corrosion Considerations

• 1.4404 pitting corrosion resistance: Low risk in high-chloride environments (P.EJ., desalination plants), but avoid extreme concentrations (use super duplex grades for those).
• 1.4404 Prueba de spray de sal ASTM B117: Shows minimal rust after 1000+ hours—far longer than EN 1.4301.
• 1.4404 sour service NACE MR0175: Approved for use in sour gas environments (high hydrogen sulfide), making it suitable for oil and gas equipment.
• 1.4404 VS 1.4401 sensitization: EN 1.4404 won’t “sensitize” (become prone to intergranular corrosion) después de soldar, unlike EN 1.4401 (which may need post-weld annealing).

Estudio de caso: An offshore oil rig usesEN 1.4404 acero inoxidable for ballast systems. The metal’schloride stress corrosion cracking immunity ytasa de corrosión del agua de mar de <0.1 mm/year keep the system leak-free for 15+ años.

3. A alta temperatura & Low-Temperature Properties

EN 1.4404 acero inoxidable performs reliably across a wide temperature range—from cryogenic to high heat.

Rendimiento de alta temperatura

• 1.4404 high-temperature strength: Maintains strength up to 750 ° C, suitable for heat exchanger tubes and furnace parts.
• 1.4404 resistencia a la oxidación hasta 925 °C intermittent: Resists scaling when used intermittently at high temperatures (P.EJ., oven components).
• 1.4404 continuous service temperature: Safe for continuous use up to 700 °C—avoid higher temps to prevent strength loss.
• 1.4404 Datos de ruptura de fluencia: At 700 °C and 100 MPa stress, it resists creep (deformación lenta) for over 10,000 horas.

Low-Temperature Performance

• 1.4404 low-temperature toughness: Remains ductile at -196 ° C (liquid nitrogen temperature), used for cryogenic vessels.
• 1.4404 impact energy at -196 ° C: Absorbs over 60 J of energy, preventing brittle fracture in cold environments.
• 1.4404 cryogenic ductility: Retains 90% of its room-temperature ductility at -196 °C—critical for LNG (liquefied natural gas) equipo.

Thermal Properties

• 1.4404 thermal expansion coefficient: 16.5 × 10⁻⁶/°C (20–100 °C) — important for designing parts that handle temperature changes.
• 1.4404 thermal conductivity: 16.0 W/(m·K) en 100 °C — efficient heat transfer for heat exchangers.

4. Tratamiento térmico & Microstructure Stability

Proper heat treatment helps maintainEN 1.4404 acero inoxidable’s corrosion resistance and microstructure.

Common Heat Treatment Processes

Critical Considerations

• 1.4404 evitación de precipitación de carburo: Its low carbon content makes carbide precipitation almost impossible—even if heat treatment is slightly off.
• 1.4404 austenitic grain size ASTM 5–8: Solution annealing keeps grains small, balancing strength and ductility.
• 1.4404 cold working strain hardening: Trabajo en frío (P.EJ., flexión) increases hardness but doesn’t reduce corrosion resistance.
• 1.4404 magnetic permeability after cold work: May become slightly magnetic after heavy cold working, but this doesn’t impact performance.

Ejemplo: A heat exchanger manufacturer usesEN 1.4404 acero inoxidable for tubes. They solution anneal at 1050 °C to ensureevitación de precipitación de carburo—tubes resist corrosion from hot coolants for 20+ años.

5. Soldadura, Fabricación & Pautas de mecanizado

EN 1.4404 acero inoxidable is easy to weld and fabricate, making it suitable for complex parts.

Punta de soldadura

• 1.4404 weldability rating: Excelente (rated 9/10)—works with TIG, A MÍ, and stick welding.
• 1.4404 No se requiere precalentamiento: Saves time compared to martensitic grades (P.EJ., 410).
• 1.4404 filler metal ER316L: Low-carbon filler matches the base metal’s corrosion resistance.
• 1.4404 interpass temperature 150 °C max: Prevents overheating and carbide formation.
• 1.4404 post-weld cleaning passivation: Nitric acid treatment boosts corrosion resistance by 40–50%.

Mecanizado & Fabricación

• 1.4404 velocidades de mecanizado y alimentos: Use 120–180 m/min (turning) and 0.1–0.25 mm/rev—slower than EN 1.4301 due to molybdenum.
• 1.4404 Vida de herramienta con carburo recubierto: Coated carbide tools (P.EJ., Tialn) last 2–3x longer than uncoated tools.
• 1.4404 Dibujo profundo de formabilidad: Good—its austenitic structure lets it be drawn into shapes like food processing bowls.
• 1.4404 Técnicas de control de distorsión: Use balanced welding sequences and clamps to minimize warping.

Estudio de caso: A brewery usesEN 1.4404 acero inoxidable for fermentation tanks. They weld tanks with ER316L filler and followinterpass temperature 150 °C max—tanks resist corrosion from beer acids and cleaning chemicals for 10+ años.

6. Formularios de productos, Tallas & Cadena de suministro

EN 1.4404 acero inoxidable is available in diverse forms to fit any project.

Formas de productos comunes

• 1.4404 espesores de placa de acero inoxidable: 3–200 mm (reactores químicos, estructuras en alta mar).
• 1.4404 gráfico de calibre: 26 indicador (0.45 mm) a 8 indicador (4.0 mm) (food equipment, instrumentos quirúrgicos).
• 1.4404 seamless pipe EN 10216-5: Sizes ½–24 inches (oil and gas piping, desalination plants).
• 1.4404 welded tube EN 10217-7: Sizes ½–12 inches (pharmaceutical piping, brewery lines).
• 1.4404 stock de barra redonda: Diameters 5–300 mm (sujetadores, hardware marino).
• 1.4404 Forestas personalizadas: For complex parts like valve bodies and offshore connectors.

Consejos de la cadena de suministro

• 1.4404 Tamaños de hierro en ángulo: 20x20x3 mm to 100x100x10 mm (structural supports in coastal buildings).
• 1.4404 tolerancias de barra plana: ±0.1 mm for thickness—ideal for precision parts like surgical implants.
• 1.4404 Proveedores de bares huecos: Choose ISO 9001-certified suppliers for consistent wall thickness.
• 1.4404 mirror finish sheets: 0.5–5 mm thicknesses (architectural cladding, equipo médico).

7. Aplicaciones de la industria & Estudios de caso

EN 1.4404 acero inoxidable is used in industries where corrosion resistance and hygiene are critical.

Aplicaciones clave

• 1.4404 reactores farmacéuticos: Handle drugs and solvents without corrosion—meet strict hygiene standards.
• 1.4404 brewery tanks: Store beer and wort without adding metallic tastes—resist acid corrosion.
• 1.4404 marine instrumentation tubing: Withstands saltwater corrosion for accurate data collection.
• 1.4404 offshore ballast systems: Prevent leaks in harsh marine environments.
• 1.4404 surgical implants ISO 5832-1: Biocompatible and corrosion-resistant—used for hip and knee implants.

Ejemplo del mundo real: Un fabricante de dispositivos médicos usaEN 1.4404 acero inoxidable for surgical implants. The metal meets1.4404 surgical implants ISO 5832-1 estándares, es biocompatible, and resists corrosion from bodily fluids—ensuring implants last 20+ años.

Yigu Technology’s Perspective on EN 1.4404 Acero inoxidable

En la tecnología yigu, we supplyEN 1.4404 acero inoxidable to pharmaceutical, marina, and medical clients globally. Its low-carbon design and high PREN rating make it perfect for welded parts in harsh environments. We offer custom cuts (P.EJ., seamless pipe for desalination plants) and provide certification documents (EN 10088-2, ASTM A240) to meet industry standards. For medical clients, we ensure our EN 1.4404 se encuentra con ISO 5832-1, so their implants are safe and durable.

FAQ About EN 1.4404 Acero inoxidable

1. Is EN 1.4404 stainless steel magnetic?
   No—unless it’s heavily cold-worked. Its 1.4404 low-carbon austenitic structure is non-magnetic, but heavy bending or stamping can make it slightly magnetic. This doesn’t affect corrosion resistance or strength.
2. When should I use EN 1.4404 instead of EN 1.4401?
   Use EN 1.4404 if your project involves welding. Its low carbon content ensures intergranular corrosion prevention, while EN 1.4401 may need post-weld annealing to avoid sensitization.
3. Can EN 1.4404 be used in sour gas environments?
   Sí! It’s approved under 1.4404 sour service NACE MR0175 for use in high-hydrogen sulfide environments (P.EJ., oil and gas wells). Its corrosion resistance prevents equipment failure in these harsh settings.