304H stainless steel provides a solution when pipework is often exposed to high temperatures. Designed for demanding high-temperature service, it avoids costly déformation par fluage. Ensure reliable performance of your tuyau en acier inoxydable et raccords en acier inoxydable.
What Is 304H Stainless Steel?
Stainless steel 304H (UNS S30409) is a high-carbon version of stainless steel 304. It is an alliage austénitique chrome-nickel. The high carbon content increases strength at high temperatures and enhances creep resistance. This makes 304H stainless steel ideal for applications above 500 degrees Celsius (932 degrees Fahrenheit).
Key Advantages of 304H Stainless Steel
Stainless Steel 304H retains its strength at very high temperatures and resists deformation under load.
Plus élevé carbone content increases creep strength. It resists slow, permanent deformation over time.
Les chrome content creates a protective oxide layer that prevents surface degradation. This ensures longevity in oxidising environments.
Despite its high carbon content, Stainless Steel 304H is easy to weld.
The 304H Steel is used in many industries. It is used in chemical processing, power generation and refining, and can handle corrosive media at high temperatures.
Composition chimique
| Élément | Cr | Ni | C | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|
| Contenu (%) | 18.0 – 20.0 | 8.0 – 10.5 | 0.04 – 0.10 | ≤2.00 | ≤0.75 | ≤0.045 | ≤0.030 |
Ce que nous faisons
Propriétés mécaniques typiques
| Résistance à la traction | Limite d'élasticité (décalage de 0,2%) | Élongation | Dureté (HRB) | Densité | Plage de fusion |
|---|---|---|---|---|---|
| ≥515MPa(75ksi) | ≥205MPa(30ksi) | ≥40 | ≤92 | 8,0 g/cm³ | 1400-1450°C |
304H Stainless Steel in High-Temperature Piping Applications
- Pressure Vessels: Handling of high temperature and high pressure vessels including steam headers and échangeurs de chaleur.
- Boiler components: The 304H steel is used for superheater and reheater pipework. They can withstand high heat and steam pressures.
- Refinery Piping: Commonly found in petrochemical plants, it handles hot process fluids. This includes furnaces and crackers.
- Power Plants: Components exposed to flue gases or hot steam can be made of 304H Stainless Steel.
- Industrial Furnaces: Used in radiant tubes, mufflers and heat treatment units. Because it prevents scaling and oxidation at very high temperatures.
Sourcing 316H Stainless Steel Pipe 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 304H 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.
304H is designed for high temperatures, but specific procédures de soudage are also important. Please ensure proper traitement post-soudure.
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