30CrMo alloy steel yeeb nkab muaj cov ntsiab lus carbon ntawm 0.26 ~ 0.34, silicon ntsiab lus ntawm 0.17 ~ 0.37, manganese cov ntsiab lus ntawm 0.40 ~ 0.70, molybdenum cov ntsiab lus ntawm 0.15 ~ 0.25, chromium ntsiab lus ntawm 0.80 ~ 1.10.
Cov txheej txheem rau nruab nrab thiab tsis tshua muaj siab boiler raj: GB3087-1999 seamless steel hlab rau qis thiab nruab nrab siab boilers.
High kub prefabricated ncaj qha faus rwb thaiv tsev yeeb nkab yog ib hom ncaj qha faus prefabricated rwb thaiv tsev yeeb nkab nrog zoo rwb thaiv tsev kev ua tau zoo, kev ruaj ntseg thiab kev ntseeg siab thiab tsawg project nqi.
Cov yeeb nkab steel muaj hollow seem thiab nws qhov ntev yog ntau dua li txoj kab uas hla lossis ncig ntawm cov hlau. Raws li cov duab seem, nws tau muab faib ua voj voog, square, rectangular thiab tshwj xeeb-puab steel kav; Raws li cov khoom siv, nws tau muab faib ua carbon structural steel yeeb nkab, qis alloy steel yeeb nkab, alloy steel yeeb nkab thiab cov yeeb nkab steel yeeb nkab.
Stainless hlau square raj yog ib hom hollow ntev hlau. Vim tias seem yog square, nws hu ua square tube. Cov kav dej ntau yog siv los thauj cov kua dej, xws li roj, nkev, dej, roj, nkev, thiab lwm yam.
Hauv seamless steel yeeb nkab series, muaj cov khoom hu ua Q345B seamless steel yeeb nkab, uas belongs rau qis alloy series. Ntawm cov ntaub ntawv tsis tshua muaj alloy, cov khoom siv no yog qhov ntau tshaj plaws. Q345B seamless steel yeeb nkab siv los hu ua 16Mn seamless steel yeeb nkab.
Lub ntsiab importing lub teb chaws ntawm boiler raj yog Nyiv thiab lub teb chaws Yelemees. Cov lus qhia tshwj xeeb ntawm cov khoom siv feem ntau yog 15914.2mm; 2734.0 hli; 219.110.0 hli; 41975mm; 406.460mm, thiab lwm yam. Yam tsawg kawg nkaus specification yog 31.84.5mm, thiab qhov ntev yog feem ntau 5 ~ 8m.
Qhov tseem ceeb ntawm qhov kub thiab txias tempering brittleness ntawm precision ci raj feem ntau suav hais tias yog qhov tshwm sim ntawm kev sib cais ntawm impurity ntsiab xws li phosphorus, tin, antimony thiab arsenic nyob rau hauv thawj austenite grain ciam teb, ua rau grain ciam teb embrittlement.
16Mn yog cov hlau tsis tshua muaj siab-lub zog steel: cov ntsiab lus carbon yog 0.1% - 0.25%, thiab cov ntsiab lus tseem ceeb ntawm manganese, silicon, vanadium, niobium thiab titanium ntxiv; Nws tag nrho cov ntsiab lus alloy yog tsawg dua 3%.
(1) Cov qib zoo carbon steel qauv muaj xws li 20g, 20mng thiab 25mng.
(2) Alloy structural steel qib: 15mog, 20mog, 12crmog, 15CrMoG, 12CR2MOG, 12crmovg, 12Cr3MoVSiTiB, thiab lwm yam.
Sab hauv epoxy txheej polyethylene anticorrosive steel yeeb nkab yog ib yam tshiab ntawm cov hlau yas puas yeeb nkab. Nws yog tsim los ntawm steel yeeb nkab substrate, epoxy resin puab txheej thiab polyethylene txheej txheej.
Seamless steel raj yog ib txoj hlua ntev ntawm cov hlau nrog hollow seem thiab tsis muaj kev sib koom ua ke nyob ib puag ncig nws. Seamless steel yeeb nkab muaj qhov hollow seem thiab tuaj yeem siv los ua cov kav dej xa dej, xws li cov kav dej xa cov roj, cov nkev, roj, roj, dej thiab qee yam khoom siv. Piv nrog cov khoom hlau xws li cov hlau puag ncig, seamless steel yeeb nkab muaj tib lub zog flexural thiab torsional thiab lub teeb yuag. Nws yog ib qho kev lag luam steel hlau.