{"id":2444,"date":"2026-01-23T09:58:00","date_gmt":"2026-01-23T08:58:00","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2444"},"modified":"2026-01-30T03:01:13","modified_gmt":"2026-01-30T02:01:13","slug":"nichel-200-vs-nichel-201","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/it\/nichel-200-vs-nichel-201\/","title":{"rendered":"Nichel 200 vs Nichel 201"},"content":{"rendered":"

Nel regno dell'alta purezza leghe di nichel<\/a>, Nichel 200<\/a> (UNS N02200) e Nichel 201<\/a> (UNS N02201) sono i cavalli di battaglia dell'industria chimica e aerospaziale. Sebbene entrambe le leghe offrano un'eccezionale resistenza agli alcali caustici e all'acqua distillata, la comprensione delle loro sottili sfumature chimiche \u00e8 fondamentale per garantire l'integrit\u00e0 strutturale in ambienti ad alta temperatura.<\/p>\n

\"\"<\/p>\n

Differenze tra nichel 200 e 201<\/h3>\n

The fundamental difference between Nickel 200 and Nickel 201 lies in their carbon content. Nickel 200 is a commercially pure wrought nickel with a maximum carbon content of 0.15%. In contrast, Nickel 201 is the “low-carbon” version, restricted to a maximum of 0.02%.<\/p>\n

Questa differenza di carbonio altera drasticamente la loro stabilit\u00e0 termica. Quando il nichel 200 \u00e8 esposto a temperature superiori a 315\u00b0C (600\u00b0F) per periodi prolungati, il carbonio in eccesso precipita sotto forma di grafite ai confini del grano. Questo fenomeno, noto come grafitizzazione, porta a una grave perdita di duttilit\u00e0 e all'infragilimento intergranulare. Il nichel 201, con il suo basso tenore di carbonio controllato, \u00e8 stato specificamente progettato per evitare questo rischio, mantenendo le sue propriet\u00e0 meccaniche fino a 650\u00b0C (1200\u00b0F).<\/p>\n\n\n\n\n\n\n\n\n\n\n
Propriet\u00e0<\/td>\nNichel 200 (UNS N02200)<\/td>\nNichel 201 (UNS N02201)<\/td>\n<\/tr>\n<\/thead>\n
Contenuto di carbonio (max)<\/td>\n0.15%<\/td>\n0.02%<\/td>\n<\/tr>\n
Densit\u00e0<\/td>\n8,89 g\/cm\u00b3<\/td>\n8,89 g\/cm\u00b3<\/td>\n<\/tr>\n
Temperatura massima di servizio<\/td>\n315\u00b0C (600\u00b0F)<\/td>\n650\u00b0C (1200\u00b0F)<\/td>\n<\/tr>\n
Resistenza alla trazione (ricotto)<\/td>\n67.000 psi (462 MPa)<\/td>\n58.000 psi (400 MPa)<\/td>\n<\/tr>\n
Resistenza allo snervamento (ricotto)<\/td>\n21.500 psi (148 MPa)<\/td>\n15.000 psi (103 MPa)<\/td>\n<\/tr>\n
Durezza (Rockwell B)<\/td>\n45 – 55<\/td>\n40 – 50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nichel 200 vs 201 come scegliere<\/h3>\n

La scelta tra questi due gradi \u00e8 dettata principalmente dalla temperatura di esercizio e dalla resistenza meccanica richiesta.<\/p>\n

    \n
  1. \n

    Soglia di temperatura: Se l'applicazione prevede un servizio continuo a temperature superiori a 315\u00b0C (600\u00b0F), il nichel 201 \u00e8 l'unica scelta possibile. Viene spesso utilizzato negli evaporatori caustici, nelle imbarcazioni a combustione e nei componenti elettronici in cui il calore elevato \u00e8 un fattore determinante.<\/p>\n<\/li>\n

  2. \n

    Resistenza meccanica: Poich\u00e9 il carbonio agisce come agente rinforzante nella matrice di nichel, il nichel 200 presenta una durezza e una resistenza alla trazione leggermente superiori rispetto al nichel 201. Per le applicazioni a temperatura ambiente o al di sotto del limite di 315\u00b0C, il nichel 200 offre una migliore rigidit\u00e0 strutturale.<\/p>\n<\/li>\n

  3. \n

    Resistenza alla corrosione: Entrambi i gradi offrono una resistenza identica nella maggior parte degli ambienti, in particolare contro la soda caustica (NaOH) e l'idrossido di potassio. Tuttavia, per la costruzione di recipienti in pressione, \u00e8 necessario assicurarsi che il materiale soddisfi i requisiti dell'ASME Boiler and Pressure Vessel Code specifici per la temperatura prevista.<\/p>\n<\/li>\n<\/ol>\n

    \"\"<\/h3>\n

    Sensibilit\u00e0 alle impurit\u00e0 del nichel 200 vs 201<\/h3>\n

    Beyond carbon, both alloys are highly sensitive to sulfur contamination. Exposure to sulfur-bearing compounds at elevated temperatures can cause “sulfur embrittlement.” Sulfur migrates to the grain boundaries, forming a low-melting-point nickel sulfide eutectic that destroys the metal’s ductility.<\/p>\n

    Furthermore, Nickel 200\u2019s sensitivity to carbon precipitation is its “Achilles’ heel” in high-temp scenarios. While Nickel 201 mitigates this, users must still ensure that fabrication processes (like welding or heat treatment) do not introduce exogenous carbon or sulfur. Proper surface cleaning and the use of low-carbon filler metals are essential to maintaining the purity and performance of these alloys.<\/p>\n

    \n

    Domande e risposte correlate<\/h3>\n

    D1: \u00c8 possibile ottenere la doppia certificazione Nickel 200 e Nickel 201? S\u00ec. Un materiale pu\u00f2 essere certificato doppiamente se il suo contenuto di carbonio \u00e8 \u2264<\/span> 0,02% (conforme alle specifiche del Nichel 201), pur soddisfacendo i requisiti di resistenza meccanica del Nichel 200.<\/p>\n

    D2: Quale lega \u00e8 migliore per la lavorazione della soda caustica? Entrambe sono eccellenti. Tuttavia, se il processo prevede il riscaldamento della soda caustica ad alte concentrazioni a temperature superiori a 315\u00b0C, \u00e8 necessario utilizzare il nichel 201 per prevenire la cricca da tensocorrosione e la grafitizzazione.<\/p>\n

    D3: C'\u00e8 una differenza di prezzo significativa tra i due prodotti? In generale, la differenza di prezzo \u00e8 minima. Il costo \u00e8 determinato pi\u00f9 dal prezzo di mercato del nichel grezzo che dal processo di raffinazione del carbonio.<\/p>","protected":false},"excerpt":{"rendered":"

    In the realm of high-purity nickel alloys, Nickel 200 (UNS N02200) and Nickel 201 (UNS N02201) stand as the workhorses of the chemical processing and aerospace industries. While both alloys offer exceptional resistance to caustic alkalis and distilled water, understanding the subtle chemical nuances between them is critical for ensuring structural integrity in high-temperature environments. 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the realm of high-purity nickel alloys, Nickel 200 (UNS N02200) and Nickel 201 (UNS N02201) stand as the workhorses of the chemical processing and aerospace industries. While both alloys offer exceptional resistance to caustic alkalis and distilled water, understanding the subtle chemical nuances between them is critical for ensuring structural integrity in high-temperature environments.…","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/posts\/2444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/comments?post=2444"}],"version-history":[{"count":3,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/posts\/2444\/revisions"}],"predecessor-version":[{"id":2453,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/posts\/2444\/revisions\/2453"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/media\/2451"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/media?parent=2444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/categories?post=2444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/it\/wp-json\/wp\/v2\/tags?post=2444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}