Q235A Steel yog dab tsi
Q235A yog ib qho dav dav - lub hom phiaj carbon structural steel tau teev tseg hauv Suav tus qauv GB / T 700, cov lus qhia tshwj xeeb rau carbon structural steels. Qhov kev xaiv tau nyeem raws li qhov tsawg kawg nkaus tawm lub zog ntawm 235 MPa, thiab tsab ntawv A qhia txog cov chav kawm zoo hauv Q235 tsev neeg. Nws yog cov hlau me me tshaj plaws hauv Suav kev tsim kho thiab kev tsim vaj tsev dav dav, tshwm sim raws li phaj, ntu, bar, sawb thiab welded yeeb nkab.
Cov qib yog cov pa roj carbon monoxide -manganese steel uas tsis txhob txwm ua alloying ntxiv. Nws qhov kev nyiam yog kev sib xyaw ua ke ntawm lub zog txaus, zoo ductility thiab zoo heev weldability ntawm tus nqi qis, uas ua rau nws cov khoom siv rau cov qauv tsim, kev txhawb nqa, platforms thiab kev tsim khoom.
Chemical Composition thiab Mechanical Properties
Vim tias Q235A tsis muaj kev cuam tshuam qhov yuav tsum tau ua hauv GB / T 700, cov khoom tseem ceeb tshaj plaws yog lub zog tawm los, lub zog tensile thiab elongation. Yield zog poob raws li thickness nce, yog li tus nqi tswj nyob ntawm cov khoom raug txiav txim.
| Khoom | Kev xav tau |
|---|---|
| Yam tsawg kawg nkaus yield zog, thickness 16 hli thiab qis dua | 235 MPa rau |
| Yam tsawg kawg nkaus yield zog, siab tshaj 16 mus rau 40 mm | 225 MPa |
| Yam tsawg kawg nkaus yield zog, siab tshaj 40 mus txog 60 mm | 215 MPa |
| Yam tsawg kawg yield zog, siab tshaj 60 mus txog 100 mm | 195 MPa ua |
| Tensile zog | 370-500 MPa |
| Tsawg kawg elongation | Txog 26% ntawm 16 hli thiab nyias |
| Cov pa roj carbon | 0.22% siab tshaj |
| Manganese | 1.40% siab tshaj |
| Silicon | 0.35% siab tshaj |
| Phosphorus | 0.045% siab tshaj |
| Sulfur | 0.050% siab tshaj |
| Impact test | Tsis xav tau rau chav kawm A |
Qhov tsis muaj qhov yuav tsum tau kuaj xyuas yog ib qho kev txwv tseem ceeb tshaj plaws ntawm chav kawm A, thiab nws yog vim li cas chav kawm B yog qhov nyiam rau kev thauj khoom dynamically lossis qis -kub siv.
International sib npaug ntawm Q235A
Q235A feem ntau hla- hais txog cov qib txawv teb chaws, tab sis qhov sib npaug yog kwv yees ntau dua li qhov tseeb.
ASTM A36 Txuj:qhov ze tshaj plaws hauv Teb Chaws Asmeskas sib npaug, nrog qhov tsawg kawg nkaus tawm lub zog ntawm 250 MPa thiab tensile ntau ntawm 400-550 MPa. Chemistry txwv txawv, yog li A36 muaj zog me ntsis ntawm daim ntawv.
EN S235JR:qhov ze tshaj plaws nyob sab Europe qib, nrog qhov tsawg kawg nkaus yield zog ntawm 235 MPa ntawm 16 mm thiab hauv qab no, ib tug tensile ntau yam ntawm 360-510 MPa, thiab ib tug yuav tsum Charpy zog ntawm 27 J ntawm 20 degrees C. Qhov kev cuam tshuam yuav tsum tau ua rau S235JR tougher dua Q235A.
JIS SS400:Nyiv cov txheej txheem qib nrog qhov tsawg kawg nkaus tawm lub zog ntawm 245 MPa thiab tensile ntau ntawm 400-510 MPa. SS400 tswj tsuas yog sulfur thiab phosphorus cov ntsiab lus, whereas Q235A kuj qhia txog carbon, silicon thiab manganese txwv.
Vim hais tias cov chemistry thiab kev xeem yuav tsum sib txawv, ib qho kev hloov pauv yuav tsum ib txwm raug ntsuas tawm tsam tus qauv tsim qauv thiab qhov ntsuas kub ntawm qhov kev pabcuam es tsis yog kho raws li kev sib pauv ncaj.
Q235A vs Q235B
Ob chav kawm sib qhia tib lub hauv paus tsim thiab tib lub npe nominal yield zog, thiab qhov sib txawv yog nyob rau hauv toughness thiab muaj pes tsawg leeg.
Q235A tsis muaj qhov cuam tshuam rau kev xeem; Q235B yuav tsum xa qhov tsawg kawg nkaus Charpy cuam tshuam lub zog ntawm 27 J ntawm 20 degrees C.
Q235A tso cai txog 0.22% carbon thiab 0.050% sulfur; Q235B nruj cov no rau 0.20% carbon thiab 0.045% sulfur.
Cov ntsiab lus ntawm cov sulfur qis ntawm Q235B txo qhov kev pheej hmoo ntawm kub shortness thiab txhim kho toughness thiab ductility, uas yog vim li cas cov chav kawm B raug xaiv rau welded qauv uas pom cyclic loading los yog txias kev pab cuam.
Hauv kev xyaum, chav kawm B yog qhov kev nyab xeeb dua qub rau siab - khaws cia lossis qaug zog - cov khoom tsim tawm, thaum chav kawm A yog qhov tsim nyog rau cov ncej zoo li qub, kev txhawb nqa thiab kev ua haujlwm dav dav ntawm qhov kub thiab txias.
Daim ntawv thov, Fabrication thiab Purchasing Notes
Q235A yog siv rau lub tsev thav duab, choj thiab platform txhawb nqa, kis tau tus mob, cia tank shells, yeeb nkab racks, machinery puag thiab dav welded fabrication. Nws yog tsim raws li kub- dov phaj, coil, H- nqaj, lub kaum sab xis, channel, tiaj tiaj bar thiab puag ncig bar, thiab tseem siv los ua cov khoom siv rau cov yeeb nkab welded thiab hollow seem.
Cov hlau welds yooj yim nrog tag nrho cov txheej txheem arc siv me me hlau electrodes los yog muab tub lim, thiab preheat yog ib txwm tsis tsim nyog hauv qab li 40 mm thickness nyob rau hauv ambient tej yam kev mob. Kev sib sau txias thiab nplaim taws ua raws li tus qauv kev coj ua. Qhov twg cov qauv raug cuam tshuam, qaug zog lossis qis- qhov kev pabcuam kub, qhov tshwj xeeb yuav tsum tau nce mus rau Q235B lossis Q235C, lossis raug nplua - cov qhab nia zoo li qub yuav tsum raug xaiv.
Thaum txiav txim, paub meej tias tus qauv khoom, lub thickness ntau yam uas kho lub zog yield, tus me nyuam mob, tus qauv kam rau ua thiab seb puas yuav tsum tau ib tug thib peb - daim ntawv pov thawj soj ntsuam los yog ultrasonic xeem. Kev kos cim thiab traceability yuav tsum tso cai rau tus lej xov tooj cua sov ntawm cov khoom yuav raug muab tso rau hauv daim ntawv pov thawj tshuaj xyuas.
FAQ
Q: Cov khoom siv Q235A yog dab tsi?
Q235A yog cov qauv carbon steel uas tau teev tseg hauv GB / T 700 nrog qhov tsawg kawg nkaus yield zog ntawm 235 MPa rau ntu 16 hli thiab nyias, lub zog tensile ntawm 370-500 MPa thiab tsis muaj qhov yuav tsum tau muaj kev cuam tshuam.
Q: Q235A sib npaug li cas?
Nws yog feem ntau hla- hais txog ASTM A36, EN S235JR thiab JIS SS400, tab sis tsis muaj ib qho ntawm cov no yog qhov sib tw tiag tiag vim tias kev txwv chemistry thiab cov kev ntsuas cuam tshuam sib txawv.
Q: Qhov txawv ntawm Q235A thiab Q235B yog dab tsi?
Q235B yuav tsum muaj qhov tsawg kawg nkaus Charpy cuam tshuam lub zog ntawm 27 J ntawm 20 ° C thiab siv cov kev txwv nruj dua ntawm cov pa roj carbon thiab sulfur, ua rau nws tawv dua thiab tsim nyog rau cov qauv welded thiab dynamically loaded.
Q: Qhov txawv ntawm Q235A thiab SS400 yog dab tsi?
SS400 tshwj xeeb tsuas yog leej faj thiab phosphorus txwv thiab muaj qhov tsawg kawg nkaus tawm lub zog ntawm 245 MPa, thaum Q235A kuj tswj cov pa roj carbon, silicon thiab manganese thiab muaj qhov tsawg kawg nkaus yield zog ntawm 235 MPa.
Q: Puas yog Q235A zoo rau vuam?
Yog lawm. Nws cov ntsiab lus tsis tshua muaj cov pa roj carbon monoxide muab qhov zoo tshaj plaws weldability nrog tag nrho cov txheej txheem arc, thiab preheating feem ntau tsis tsim nyog ntawm cov tuab tuab nyob rau hauv ib puag ncig ib puag ncig.
Q: Qhov txawv ntawm Q235A thiab SPCC yog dab tsi?
SPCC yog ib qho txias - dov cov ntawv lag luam zoo nrog lub ntsej muag du thiab elongation zoo, thaum Q235A ib txwm muab cov kub dov nrog lub ntsej muag rougher thiab ntau dua cov qauv tsim.
