S420G1+QT yog siab- lub zog offshore qauv steel phaj ntawv pov thawj raws li EN 10225 rau kev ruaj khov offshore qauv, roj / roj platforms, thiab cua turbine foundations. Cov lus "+ QT" qhia tau hais tias tus me nyuam muaj quenched thiab tempered, uas muab ib qho zoo heev ua ke ntawm siab zog thiab toughness los ntawm kev kho cua sov. Nws muaj qhov tsawg kawg nkaus yield zog ntawm 420 MPa (rau thickness Tsawg dua los yog sib npaug rau 16 hli) thiab tensile lub zog ntawm 500 mus rau 660 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 19%. Cov tshuaj muaj pes tsawg leeg yog tswj nruj me ntsis nrog cov pa roj carbon tsawg dua lossis sib npaug li 0.14%, manganese Tsawg dua lossis sib npaug li 1.65%, thiab sulfur Tsawg dua lossis sib npaug li 0.010%. Qhov siab tshaj plaws phaj thickness yog 100 hli. Impact toughness yog kuaj ntawm -40℃nrog qhov tsawg kawg nkaus lub zog yuav tsum tau ntawm 60 Joules.
S420G2+QT kuj yog quenched thiab tempered offshore structural steel ntawv pov thawj raws li EN 10225, sib koom tib yam tsawg kawg nkaus yield zog ntawm 420 MPa thiab tensile zog ntau yam ntawm 500-660 MPa raws li G1 . Txawm li cas los, S420G2+Sulterfection muaj pes tsawg leeg txwv Tsawg dua lossis sib npaug li 0.007% (piv rau Tsawg dua lossis sib npaug rau 0.010% rau G1). Tus lej "G" siab dua (G2 vs. G1) qhia tias yuav tsum nruj dua rau kev coj dawb huv thiab tawv. Zoo li G1, nws raug kuaj xyuas ntawm -40℃nrog lub zog tsawg kawg nkaus ntawm 60 Joules. Qhov siab tshaj plaws phaj thickness kuj yog 100 hli.
Ob leeg S420G1+QT thiab S420G2+QT yog EN 10225- ntawv pov thawj quenched thiab tempered offshore structural steels nrog zoo tib yam khoom siv (tsawg kawg yield 420 MPa, tensile 500-660 MPa) thiab tej yam yuav tsum tau℃(660 MPa) Lawv qhov sib txawv tseem ceeb yog nyob rau hauv cov tshuaj purity: S420G1+QT yog haum rau cov kev siv sab nrauv sab nrauv, thaum S420G2+QT nta cov kev txwv nruj dua ntawm leej faj (tsawg dua lossis sib npaug li 0.007%), muab kev txhim kho qis-kub toughness thiab weldability rau ntau qhov kev xav tau ntawm ntug dej hiav txwv. Ob qib tswj tau zoo heev weldability thiab corrosion kuj, ua rau lawv zoo tagnrho rau offshore platforms, shipbuilding, thiab subsea pipelines. Kev xaiv ntawm lawv nyob ntawm seb qhov project xav tau tus qauv kev ua haujlwm sab nrauv (G1) lossis txhim kho purity thiab toughness rau cov ntawv thov tseem ceeb (G2).
Cov cuab yeej cuab tam rau S420G1+QT steel phaj:
| Thickness (hli) | |||||
| S420G1+QT steel phaj | Tsawg dua los yog sib npaug li 16 | >16 Tsawg dua lossis sib npaug li 40 | >40 Tsawg dua los yog sib npaug rau 63 | >63 Tsawg dua lossis sib npaug li 80 | > 80 |
| Yield zog (Ntau dua lossis sib npaug rau Mpa) | 420 | 400 | 390 | 380 | 380 |
| Tsawg dua los yog sib npaug li 40 | > 40 | ||||
| Tensile zog (Mpa) | 500-660 | 480-640 | |||
Cov cuab yeej cuab tam rau S420G2+QT steel phaj:
| Thickness (hli) | |||||
| S420G2+QT steel phaj | Tsawg dua los yog sib npaug li 16 | >16 Tsawg dua lossis sib npaug li 40 | >40 Tsawg dua los yog sib npaug rau 63 | >63 Tsawg dua lossis sib npaug li 80 | > 80 |
| Yield zog (Ntau dua lossis sib npaug rau Mpa) | 420 | 400 | 390 | 380 | 380 |
| Tsawg dua los yog sib npaug li 40 | > 40 | ||||
| Tensile zog (Mpa) | Ntau dua lossis sib npaug li 500 | Ntau dua lossis sib npaug rau 480 | |||
Cov tshuaj muaj pes tsawg leeg rau S420G1+QT steel phaj
| Cov ntsiab lus tseem ceeb ntawm S420G1+QT steel phaj | ||||||||
| C | Si | Mn | P | S | Cr | Mo | Nb + V | Nb+V+Ti |
| 0.14 | 0.15-0.55 | 1.65 | 0.020 | 0.010 | 0.25 | 0.25 | 0.09 | 0.11 |
| Ni | Alt | Cu | N | Nb | Ti | V | Cr+Mo+Ni+Cu | |
| 0.70 | 0.015-0.055 | 0.30 | 0.010 | 0.040 | 0.025 | 0.080 | 0.90 | |
Cov tshuaj muaj pes tsawg leeg rau S420G2+QT steel phaj
| Cov ntsiab lus tseem ceeb ntawm S420G2+QT steel phaj | ||||||||
| C | Si | Mn | P | S | Cr | Mo | Nb + V | Nb+V+Ti |
| 0.14 | 0.15-0.55 | 1.65 | 0.020 | 0.007 | 0.25 | 0.25 | 0.09 | 0.11 |
| Ni | Alt | Cu | N | Nb | Ti | V | Cr+Mo+Ni+Cu | |
| 0.70 | 0.015-0.055 | 0.30 | 0.010 | 0.040 | 0.025 | 0.080 | 0.90 | |
