SA516 Qib 70yog ib tug dav siv carbon steel phaj specification tshwj xeeb uas tsim los rau siab hlab ntsha fabrication. Cov qauv tsim los ntawm American Society of Mechanical Engineers (ASME), cov khoom siv no muaj cov khoom zoo tshaj plaws, suav nrog cov tawv tawv zoo dua, zoo weldability, thiab txhim khu kev qha siab -kub tsis kam. Nws yog qhov zoo- haum rau kev pabcuam hauv qhov chaw kub qis mus rau nruab nrab, feem ntau ntawm -30℃txog 450 degree, ua rau nws zoo tagnrho rau ntau yam kev lag luam xws li roj thiab roj cia, petrochemical ua, thiab cov khoom siv hluav taws xob. Nws ruaj khov kev ua tau zoo ua kom ntseeg tau tias nws tuaj yeem tiv taus kev ntxhov siab sab hauv thiab sab nraud, ua rau muaj kev ncaj ncees ntawm cov qauv thiab kev ntseeg siab ntev ntawm cov hlab ntsha thiab cov khoom muaj feem xyuam.
SA516 Qib 70 Siab Vessel Steel Phaj Chemical Composition:
| Qib | C | Mn | Si | P max | S max |
| SA516 Qib 70 | 0.27-0.31 | 0.79-1.3 | 0.13-0.45 | 0.035 | 0.035 |
SA516 Qib 70 Siab Lub Nkoj Zoo Hlau Mechanical Properties:
| Qib | Tensile zog (MPa) | Yield zog (MPa) min | % Elongation hauv 2 nti (50mm) min | Impacting Test Temperature (degree) |
| SA516 Qib 70 | 485-620 | 260 | 17 | -20,40,-60 |
SA516 Qib 70: Cov txheej txheem siv
Steelmaking thiab Casting txheej txheem: Txais siv hluav taws xob arc rauv (EAF) lossis cov pa hluav taws xob yooj yim (BOF) smelting, ua ke nrog cov txheej txheem ladle refining (LF) thiab lub tshuab nqus tsev degassing (VD). Qhov no ua kom muaj kev tswj xyuas cov tshuaj muaj pes tsawg leeg, tshem tawm cov impurities (sulfur, phosphorus Tsawg dua lossis sib npaug li 0.035%), thiab cov hlau tsis zoo. Nruam casting yog siv los tsim cov slabs, tsis txhob muaj qhov tsis xws luag xws li shrinkage thiab porosity.
Kub Rolling txheej txheem: Slabs yog rhuab mus rau 1150-1250℃rau kub dov. Multi-pass dov nrog kev tswj kub thiab ceev yog siv los kho cov qauv nplej, txhim kho cov khoom siv kho tshuab (tuaj yeem thiab lub zog), thiab xyuas kom cov tuab tuab ntawm cov hlau phaj. Qhov kawg dov kub yog tswj ntawm 850-900℃kom tsis txhob muaj cov qoob loo ntau dhau.
Kev kho cua sov: Standardized normalizing kev kho mob (cua sov rau 890-940 degree, tuav rau ib lub sij hawm, ces cua txias) yog yuav tsum tau. Nws optimizes lub microstructure rau hauv zoo pearlite thiab ferrite, txhim kho tej yam toughness thiab seem stability. Kev kho cua sov tom qab vuam (PWHT, 595-650 degree) yuav tsum tau tom qab vuam kom tshem tawm cov kev ntxhov siab.
Vuam txheej txheem: Cov txheej txheem muaj xws li Shielded Hlau Arc Vuam (SMAW), Gas Tungsten Arc Vuam (GTAW), thiab Submerged Arc Vuam (SAW). Preheating (100-150 degree) ua ntej welding los tiv thaiv cov kab nrib pleb. Welding parameters yog nruj me ntsis tswj kom ntseeg tau qhov zoo ntawm vuam, ua raws li kev kuaj tsis muaj kev puas tsuaj (NDT).
| Daim ntawv thov | Vim li cas SA516 Qib 70? |
|---|---|
| High Pressure Tank | Lub zog tensile siab (70 ksi) txo cov phab ntsa tuab. |
| Cov khoom siv cua txias | Qhov zoo tshaj plaws notch toughness tiv thaiv brittle puas. |
| Welded Structures | Cov ntsiab lus carbon tsawg tso cai rau muaj zog, tsis xws luag -dawb welds. |
Tiv tauj peb ntawm beam@gneesteelgroup.com rau tus nqi, kev txhawb nqa, lossis kev daws teeb meem. Peb yeej ib txwm npaj los txhawb koj qhov project.
Tus qauv twg tswj hwm SA516 Qib 70?
SA516 Qib 70 yog tswj hwm los ntawm ASME Boiler thiab Pressure Vessel Code (BPVC), tshwj xeeb hauv Tshooj II, Tshooj A. Cov qauv no txhais tau tias nws cov tshuaj muaj pes tsawg leeg, cov khoom siv kho tshuab, kev tsim khoom thiab kev sim.
Puas yog SA516 Qib 70 yog carbon steel lossis hlau alloy?
SA516 Qib 70 yog carbon hlau, tsis yog hlau alloy. Nws muaj feem ntau carbon thiab manganese ua cov ntsiab lus alloying, tsis muaj chromium, npib tsib xee, lossis lwm yam alloying ntsiab.
SA516 Qib 70 puas tuaj yeem siv tau rau hauv cov ntawv thov kub tsawg -?
Yog lawm, SA516 Qib 70 tuaj yeem siv rau hauv qis- daim ntawv thov kub qis mus rau -30℃(-22℃F). Rau qhov ntsuas kub qis dua, cov qib hloov kho (piv txwv li, SA516 Gr. 70 N) nrog kev txhim kho qis-kub toughness muaj.
Dab tsi yog qhov txawv ntawm SA516 Qib 70 thiab SA516 Qib 60?
Qhov sib txawv tseem ceeb yog lub zog txhua yam: SA516 Gr. 70 muaj zog tensile ntau dua (485 MPa vs . 415 MPa) thiab tawm los (260 MPa vs . 205 MPa) muaj zog dua Gr. 60. Ob leeg muaj cov tshuaj sib xws thiab kev sib txuas.
Dab tsi ncej-weld heat treatment (PWHT) yog xav tau rau SA516 Qib 70?
Common PWHT rau SA516 Qib 70 yog kev ntxhov siab rau kev ntxhov siab, feem ntau ntawm 595℃txog 650 degree, tuav rau lub sijhawm txaus, ces txias maj mam. Qhov no txo cov seem weld kev nyuaj siab thiab txhim kho cov khoom ductility thiab toughness.
Dab tsi yog qhov yuav tsum tau elongation ntawm SA516 Qib 70?
SA516 Qib 70 yuav tsum muaj qhov tsawg kawg nkaus elongation ntawm 21% hauv 2-nti (50.8 mm) ntsuas qhov ntev. Qhov siab elongation no qhia tau hais tias zoo ductility, tso cai rau cov khoom deform plastically ua ntej tawg.
Dab tsi yog cov khoom tseem ceeb ntawm SA516 Qib 70?
Cov tshuaj lom neeg tseem ceeb muaj xws li carbon (C: 0.28-0.33%), manganese (Mn: 0.79-1.06%), phosphorus (P Less dua lossis sib npaug li 0.035%), sulfur (S Less dua lossis sib npaug li 0.035%), silicon (Si: 0.15-0.4%) cov ntsiab lus
Vim li cas SA516 Qib 70 haum rau cov hlab ntsha siab?
Nws yog tsim rau cov hlab ntsha siab vim nws zoo heev ua ke ntawm toughness, weldability, thiab siab tsis kam. Nws tuaj yeem tiv taus kev kub ntxhov sab hauv thiab sab nraud, tiv thaiv kev qaug zog, thiab tau yooj yim fabricated rau hauv ntau lub nkoj duab los ntawm vuam.
Cov txheej txheem vuam zoo li cas nrog SA516 Qib 70?
SA516 Qib 70 yog sib xws nrog cov txheej txheem vuam, suav nrog cov hlau thaiv hlau arc vuam (SMAW), roj hlau arc vuam (GMAW), flux-cored arc vuam (FCAW), thiab submerged arc vuam (SAW), kom ntseeg tau tias muaj zog sib koom ua ke.
Qhov tsawg kawg nkaus tensile lub zog ntawm SA516 Qib 70 yog dab tsi?
Qhov tsawg kawg nkaus tensile lub zog ntawm SA516 Qib 70 yog 485 MPa (70 ksi). Cov cuab yeej no ua kom cov khoom muaj peev xwm tiv taus siab thiab thauj khoom hauv kev siv lub nkoj siab tsis tas yuav deformation lossis tawg.