347 Piatto inossidabile

347 stainless steel plate is a niobium-stabilized austenitic stainless steel designed for excellent resistance to intergranular corrosion and high-temperature performance. It is widely used in chemical processing, generazione di energia, and thermal equipment where welded structures are exposed to continuous or cyclic heating. Rispetto a 321 acciaio inossidabile, 347 offers improved stability in more demanding high-temperature service conditions.

347 stainless steel plate is an austenitic chromium-nickel stainless steel stabilized with niobium (colombio). It is designed to provide excellent resistance to intergranular corrosion, especially in high-temperature environments and after welding. Rispetto a 304 E 321 acciai inossidabili, 347 offers superior stability in long-term elevated temperature service.

Composizione chimica di 347 Piastra in acciaio inossidabile

La caratteristica fondamentale di 347 stainless steel is niobium (N.B) stabilization, which prevents chromium carbide precipitation.

Elemento Contenuto (%)
Cromo (Cr) 17.0–19.0
Nichel (In) 9.0–13.0
Niobio (N.B) ≥ 10 ×C (typically 0.8–1.0)
Carbonio (C) ≤ 0.08
Manganese (Mn) ≤ 2.00
Silicio (E) ≤ 1.00
Fosforo (P) ≤ 0.045
Zolfo (S) ≤ 0.03
Ferro (Fe) Bilancia

Proprietà meccaniche di 347 Acciaio inossidabile

347 stainless steel maintains stable mechanical strength and good toughness under both room and elevated temperatures.

Proprietà Valore tipico
Resistenza alla trazione 515–750MPa
Forza di snervamento ≥ 205 MPa
Allungamento ≥ 40%
Durezza ≤ 201 HB
Densità 7.9 g/cm³

Principali caratteristiche prestazionali

1. Eccellente resistenza alle alte temperature

347 stainless steel performs well in continuous service at temperatures up to 870°C, making it suitable for thermal and high-heat industrial systems.

2. Strong Resistance to Intergranular Corrosion

Niobium stabilization prevents carbide precipitation during welding or heat exposure, significantly improving resistance to intergranular corrosion compared with non-stabilized grades like 304.

3. Buona saldabilità

347 stainless steel can be welded using standard methods without requiring post-weld heat treatment in most applications. It is especially suitable for heavy welded structures.

4. Proprietà meccaniche stabili

It maintains good strength, duttilità, and oxidation resistance in long-term thermal cycling conditions.

Applicazioni comuni di 347 Piastra in acciaio inossidabile

347 stainless steel plate is widely used in high-temperature and corrosion-resistant welded equipment.

Le applicazioni tipiche includono:

  • Scambiatori di calore
  • Componenti della caldaia
  • Parti della fornace
  • Jet engine exhaust systems
  • Attrezzature per il trattamento chimico
  • Recipienti a pressione
  • Giunti di dilatazione
  • High-temperature piping systems
  • Petrochemical industry equipment
  • Sistemi di generazione di energia

347 Stainless Steel vs 321 Acciaio inossidabile

Proprietà 347 Acciaio inossidabile 321 Acciaio inossidabile
Stabilizer Niobio (N.B) Titanio (Di)
High Temperature Stability Più alto Bene
Resistenza alla corrosione intergranulare Molto forte Forte
Prestazioni di saldatura Eccellente Eccellente
Uso tipico Severe thermal environments General high-temperature use

17 7ph lamiera di acciaio inossidabile

2205 Foglio

10 Piastra in acciaio inossidabile calibro