{"id":5663,"date":"2020-12-29T03:02:50","date_gmt":"2020-12-29T03:02:50","guid":{"rendered":"https:\/\/www.stvvalves.com\/?p=5663"},"modified":"2021-03-08T06:17:39","modified_gmt":"2021-03-08T06:17:39","slug":"what-is-the-2205-material","status":"publish","type":"post","link":"https:\/\/www.stvvalves.com\/ro\/what-is-the-2205-material\/","title":{"rendered":"Care este materialul 2205"},"content":{"rendered":"

O\u021bel inoxidabil duplex (UNS S31803, S32205<\/a>, S32750, S32900) combin\u0103 avantajele o\u021belului ferit\u0103 \u0219i austenit\u0103. Structura sa duplex este favorabil\u0103 ob\u021binerii unei rezisten\u021be ridicate \u0219i rezisten\u021b\u0103 la stres. \u00cen plus, con\u021binutul mai mare de crom, azot \u0219i molibden cre\u0219te performan\u021ba la coroziune, iar o\u021belul duplex are, de asemenea, performan\u021be bune de sudare. Datorit\u0103 propriet\u0103\u021bilor sale excelente, o\u021belul inoxidabil duplex este utilizat pe scar\u0103 larg\u0103 \u00een industria chimic\u0103, fabricarea h\u00e2rtiei, echipamente de desalinizare, firewall-uri, poduri, recipiente sub presiune, schimb\u0103toare de c\u0103ldur\u0103, palete de turbine \u0219i arbori de transmisie ale sistemelor offshore.<\/p>\r\n\r\n\r\n\r\n

Uneori, UNS S31803 \u0219i UNS S32205 sunt denumite duplex 2205. \u00cen general, UNS2205 con\u021bine o\u021beluri inoxidabile duplex ASTM S31803 \u0219i S32205. Cu alte cuvinte, S31803 \u0219i S32205 sunt denumite ambele o\u021bel inoxidabil 2205, iar S32205 este seria \u00eembun\u0103t\u0103\u021bit\u0103 a lui S31803 prin ad\u0103ugarea con\u021binutului limit\u0103 inferioar\u0103 de elemente Cr, Mo \u0219i N, ceea ce face o mic\u0103 diferen\u021b\u0103 \u00een propriet\u0103\u021bile mecanice. Diferen\u021bele lor minuscule \u00een elementele chimice \u0219i propriet\u0103\u021bile fizice sunt prezentate mai jos:<\/p>\r\n\r\n\r\n\r\n

\r\n\r\n\r\n\r\n\r\n\r\n
UNS2205<\/td>\r\nC max<\/td>\r\nP<\/td>\r\nS<\/td>\r\nSi max<\/td>\r\nMn max<\/td>\r\nN<\/td>\r\nlu<\/td>\r\nNi<\/td>\r\nCr<\/td>\r\n<\/tr>\r\n
S31803\u00a0<\/td>\r\n0.03\u00a0<\/td>\r\n0.03<\/td>\r\n0.02<\/td>\r\n1.00\u00a0<\/td>\r\n2.00<\/td>\r\n0.08-0.2<\/td>\r\n2.5-3.5<\/td>\r\n4.5-6.5<\/td>\r\n21.0-23.0<\/td>\r\n<\/tr>\r\n
S32205\u00a0<\/td>\r\n0,03 max<\/td>\r\n0.03<\/td>\r\n0.02<\/td>\r\n1,00 max<\/td>\r\n2,00 max<\/td>\r\n0.14-0.2<\/td>\r\n3.0-3.5<\/td>\r\n4.5-6.5<\/td>\r\n22.0-23.0<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n
\r\n\r\n\r\n\r\n\r\n\r\n
UNS2205<\/td>\r\nRezisten\u021ba la trac\u021biunemin, Mpa<\/td>\r\nLimita de curgere 0,21 TP3T offset, min, Mpa<\/td>\r\nAlungire, A5%<\/td>\r\n<\/tr>\r\n
S31803<\/td>\r\n620<\/td>\r\n450<\/td>\r\n25<\/td>\r\n<\/tr>\r\n
S32205<\/td>\r\n655<\/td>\r\n450<\/td>\r\n25<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n\r\n\r\n\r\n

Conform standardului ASTM A182, specifica\u021biile pentru flan\u0219e forjate sau din o\u021bel inoxidabil, fitinguri forjate \u0219i supape \u0219i piese pentru service la temperatur\u0103 \u00eenalt\u0103, UNS S31803 \u0219i UNS S32205 nu pot fi confundate \u0219i sunt specificate \u00een numere diferite, S31803 este marcat cu F51 \u0219i S32205 este F60.<\/p>\r\n\r\n\r\n\r\n

C\u00e2nd vorbim de o\u021bel 2205, se refer\u0103 \u00een general la S31803 sau F51, \u00een timp ce UNS S32205 sau F60 este conform cu ASTM 2205 adopt\u0103 un interval mai mare de rezisten\u021b\u0103 la coroziune, adic\u0103 UNS S32205 necesit\u0103 un con\u021binut mai mare de crom \u0219i azot, garant\u00e2nd astfel o rezisten\u021b\u0103 mai bun\u0103 la coroziune. \u00cen general, placa de o\u021bel S32205 \u0219i S31803 sunt numite \u0219i pl\u0103ci de o\u021bel standard dublu sau, pe scurt, plac\u0103 de o\u021bel 2205. Fabrica noastr\u0103 produce 2205 tuburi \u0219i 2205 pl\u0103ci pentru ca compozi\u021bia sa chimic\u0103 s\u0103 fie conform\u0103 cu dou\u0103 specifica\u021bii ale UNS 31803 \u0219i S30025. Placa noastr\u0103 de o\u021bel din stoc poate \u00eendeplini dou\u0103 tipuri de standarde \u00een acela\u0219i timp.<\/p>\r\n

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