Alloy 347 wani ma'auni ne, austenitic, chromium karfe dauke da columbium wanda yayi la'akari da ƙarshen hazo na carbide, don haka lalatawar intergranular. Alloy 347 an daidaita shi ta hanyar haɓakar chromium da tantalum kuma yana ba da kaddarorin ɓarna da damuwa fiye da alloy 304 da 304L, waɗanda kuma za'a iya amfani da su don bayyanawa inda tsinkaye da lalata intergranular ke damuwa. a yi fice lalata juriya, mafi alhẽri daga na gami 321. Alloy 347H ne mafi girma carbon abun da ke ciki nau'i na Alloy 347 da nuni inganta high zafin jiki da creep Properties.
Halaye
Alloy 347 bakin karfe farantin nuni mai kyau janar lalata juriya da yayi kama da 304. An samar da shi don amfani a cikin chromium carbide hazo ikonsa da 800 - 1500 ° F (427 - 816 ° C) inda alloys marasa daidaituwa kamar 304 suna ƙarƙashin intergranular. kai hari. A cikin wannan zafin jiki ikon yinsa, gaba ɗaya lalata juriya na Alloy 347 bakin karfe farantin ne mafi alhẽri daga Alloy 321 bakin karfe farantin. Alloy 347 kuma yana yin ɗan ƙarami fiye da Alloy 321 a cikin yanayi mai ƙarfi mai ƙarfi har zuwa 1500°F (816°C). Ana iya amfani da gami a matsayin wani ɓangare na mafita na nitric; mafi diluted Organic acid a matsakaici yanayin zafi da kuma a cikin tsarki phosphoric acid a ƙananan yanayin zafi da har zuwa 10% diluted mafita a high yanayin zafi. Alloy 347 bakin karfe farantin karfe yana tsayayya da lalata damuwa na polythionic acid a cikin sabis na hydrocarbon. Hakanan ana iya amfani dashi a cikin maganin caustic na chloride ko fluoride a matsakaicin yanayin zafi. Alloy 347 bakin karfe farantin ba ya aiki da kyau a cikin chloride mafita, ko da a kananan yawa, ko a cikin sulfuric acid.
Daraja | C | Si | P | S | Cr | Mn | Ni | Fe | Cb (Nb+Ta) |
347 | 0.08 max | 0.75 max | 0.045 max | 0.03 max | 17.0 - 19.0 | 2.0 max | 9.0-13.0 | Rago | 10x (C + N) - 1.0 |
347H | 0.04-0.10 | 0.75 max | 0.045 max | 0.03 max | 17.0 - 19.0 | 2.0 max | 9.0-13.0 | Rago | 8x (C + N) - 1.0 |
Ƙarfin Tensile (ksi) | 0.2% Ƙarfin Haɓaka (ksi) | Tsawaita% a cikin inci 2 |
75 | 30 | 40 |
Raka'a | Zazzabi a cikin ° C | |
Yawan yawa | 7.97g /cm³ | Daki |
Takamaiman Zafi | 0.12 Kcal /kg.C | 22° |
Rage Narkewa | 1398 - 1446 ° C | - |
Modulus na Elasticity | 193 KN /mm² | 20° |
Juriya na Lantarki | 72µΩ.cm | Daki |
Adadin Faɗawa | 16.0µm /m °C | 20 - 100 ° |
Thermal Conductivity | 16.3 W /m -°K | 20° |
Bututu / Tube (SMLS) | Shet / Plate | Bar | Ƙirƙira | Kayan aiki |
A 213 | 240, A 666 | A 276 | A 182 | A 403 |