What is 304L steel ? It is a specialised low carbon version of 304 stainless steel with enhanced weldability. Stainless steel projects must prioritise reliable fabrication, which often involves a lot of welding, whereas standard stainless steel can be subject to corrosion post-soudure. That’s why it is so important.
What is 304L Steel? The Weld-Optimized 304!
304L is an acier inoxydable austénitique, very similar to 304 steel, the main difference being its carbon content. It has a low maximum carbon content (0.03% vs. 0.08%). This low carbon minimises the precipitation of chrome carbure. This occurs during the welding process and greatly improves corrosion post-soudure résistance.
Core Advantages of 304L Steel
Low carbon prevents sensitisation, meaning that the weld is resistant to corrosion intergranulaire. This is critical in environnements corrosifs and ensures integrity after fabrication.
The steel is particularly easy to weld, reducing the risk of welding defects. Ensures tube en acier inoxydable solide et fiable joints.
Comme Acier 304, 304L steel is resistant to common corrosive agents. Resistance to atmospheric corrosion makes it ideal for general industrial applications.
It has excellent ductility and is easily formed and deep-drawn. It is favourable for the production of complex shapes.
304L steel is slightly more expensive than 304, but avoids costly failures. Post-weld traitement thermique is avoided, saving fabrication time and cost.
Chemical Composition of 304L Steel
| Élément | Cr | Ni | C | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|
| Contenu (%) | 18.0 – 20.0 | 8.0 – 12.0 | ≤0.03 | ≤2.00 | ≤0.75 | ≤0.045 | ≤0.030 |
Ce que nous faisons
Typical Mechanical Properties of 304L Steel
| Résistance à la traction | Limite d'élasticité (décalage de 0,2%) | Élongation | Dureté (HRB) | Densité | Plage de fusion |
|---|---|---|---|---|---|
| ≥485MPa(70ksi) | ≥170MPa(25ksi) | ≥40 | ≤92 | 8,0 g/cm³ | 1400-1450°C |
304L Steel in Stainless Steel Pipe and Fittings
- WELDED PIPING SYSTEMS: For all tuyauterie soudée, including general chemical process piping.
- Building structures: Welded railings, brackets and decorative elements are made of 304L.
- Food Processing Equipment: Welded tanks, vessels and pipework. It meets hygiene standards and withstands cleaning agents after welding.
- Brewery and Dairy Equipment: Complex welded components in these industries rely on 304L steel to ensure product purity and system longevity.
- Pharmaceutical industry: Clean-in-place systems often use 304L welded components to minimise the risk of contamination.
Sourcing 304L Steel Pipes and Fittings
Vérifier la conformité avec Normes ASTM. ASTM A312 couvre sans couture et tube soudé en acier inoxydable. L'ASTM A403 couvre les produits corroyés acier inoxydable austénitique les raccords.
Veiller à ce que les tuyaux et les raccords respecter les dimensions requises. Cela inclut les spécifications (par exemple, Sch 10S, Sch 40S). Un ajustement correct est essentiel.
Voir le document de spécification des tubes en acier inoxydable
Travailler avec des fabricants réputés who offer reliable 304L steel products and have certifications(par exemple ISO 9001 et CE-PED).
Demandez toujours Rapports d'essais de matériauxqui confirment la composition chimique et vérifient les propriétés mécaniques.
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