S420G1+M yog ib qho thermomechanical dov offshore structural steel ntawv pov thawj raws li EN 10225 rau kev ruaj khov offshore qauv, cua turbine foundations, thiab roj/gas platforms . Cov lus "+M" qhia txog cov txheej txheem thermomechanical tswj (TMCP), uas ua kom cov txheej txheem nplej los ntawm kev tswj dov thiab ua kom txias txias yam tsis muaj kev kho cua sov ntxiv. 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%. 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 50 Joules.
S420G2+M kuj yog ib qho thermomechanical dov 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 li G1 . Txawm li cas los xij, S420G2+M muaj cov tshuaj muaj pes tsawg leeg tsawg dua li cov tshuaj sulfur. 0.007% vs . 0.010% rau G1) thiab tswj phosphorus nruj dua (tsawg dua lossis sib npaug rau 0.020%) . Tus lej "G" siab dua (G2 vs. G1) qhia tias yuav tsum nruj dua rau kev ua kom tawv thiab purity. Qhov siab tshaj plaws phaj thickness kuj yog 100 hli.
Ob leeg S420G1+M thiab S420G2+M yog cov thermomechanical dov offshore structural steels raws li EN 10225 nrog cov khoom siv zoo tib yam (yield tsawg kawg 420 MPa, tensile 500-660 MPa) thiab cov kev xav tau cuam tshuam, (-40 degree) Lawv qhov sib txawv tseem ceeb yog nyob rau hauv cov tshuaj purity: S420G1+M yog haum rau cov kev siv sab nrauv sab nrauv, thaum S420G2+M nta cov kev txwv nruj dua ntawm leej faj (tsawg dua lossis sib npaug li 0.007%) thiab phosphorus, 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 weldability thiab muaj txog li 100mm thickness.
Cov cuab yeej cuab tam rau S420G1+M steel phaj:
| Thickness (hli) | |||||
| S420G1+M | 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 | 480 | |||
Cov cuab yeej cuab tam rau S420G2+M steel phaj:
| Thickness (hli) | |||||
| S420G2+M | 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 | |||
Tshuaj muaj pes tsawg leeg rau S420G1+M steel phaj
| Cov ntsiab lus tseem ceeb ntawm S420G1+M 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 | |
Tshuaj muaj pes tsawg leeg rau S420G2+M steel phaj
| Cov ntsiab lus tseem ceeb ntawm S420G2+M 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 | |
