S355G5+M yog ib qho thermomechanical dov (TMCP) offshore structural steel ntawv pov thawj raws li EN 10225 rau kev ruaj ntseg offshore lug, cua turbine foundations, thiab roj/gas platforms . Lub ntsiab lus "+M" qhia txog cov txheej txheem thermomechanical dov, uas ua kom cov txheej txheem nplej los ntawm kev tswj dov thiab txias yam tsis muaj kev kho cua sov ntxiv. Nws muaj qhov tsawg kawg nkaus yield zog ntawm 355 MPa (rau thickness Tsawg dua los yog sib npaug rau 16 hli) thiab tensile lub zog ntawm 470 mus rau 610 MPa, nrog rau qhov tsawg kawg nkaus elongation ntawm 22%. Qhov siab tshaj plaws phaj thickness yog 20 hli. Kev cuam tshuam toughness yog kuaj ntawm -20℃nrog qhov tsawg kawg nkaus lub zog yuav tsum tau ntawm 50 Joules, ua rau nws haum rau nruab nrab qhov chaw txias. Cov tshuaj muaj pes tsawg leeg muaj cov pa roj carbon tsawg dua lossis sib npaug li 0.14% thiab manganese Tsawg dua lossis sib npaug li 1.65%.
S355G6+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 355 MPa thiab tensile zog ntau yam ntawm 470-610 MPa li G5 . Txawm li cas los xij, nws muaj kev txhim kho qis zog 4 nrog rau qhov ntsuas qhov tsawg kawg nkaus ntawm 16 ° C kev xav tau ntawm 50 Joules. Qhov siab tshaj plaws phaj thickness yog 40 mm. Zoo li G5, nws cov tshuaj muaj pes tsawg leeg suav nrog carbon Tsawg dua lossis sib npaug rau 0.14% thiab manganese Tsawg dua lossis sib npaug li 1.65%. Kev txhim kho qhov kub thiab txias ntawm S355G6+M tau ua tiav los ntawm kev tswj cov txheej txheem nruj dua thaum lub sij hawm thermomechanical dov, ua rau nws zoo tagnrho rau kev thov ntau dua nyob rau sab ntug dej hiav txwv hauv qhov chaw txias dua.
Ob leeg S355G5+M thiab S355G6+M yog cov thermomechanical dov offshore structural steels raws li EN 10225 nrog cov khoom zoo tib yam (tsawg kawg 355 MPa, tensile 470-610 MPa). Lawv qhov sib txawv tseem ceeb yog nyob rau hauv qhov ntsuas kub thiab qhov siab tshaj plaws: S355G5+M raug kuaj ntawm -20℃thiab txwv rau 20mm thickness, haum rau qhov chaw txias txias thiab nyias daim hlau; thaum S355G6+M raug kuaj ntawm -40℃thiab muaj txog li 40mm thickness, muab superior low-temperature toughness rau ntau tseem ceeb offshore daim ntaub ntawv. Cov txheej txheem thermomechanical dov ntawm ob qib muab cov weldability zoo thiab muaj txiaj ntsig zoo ntawm lub zog thiab ductility.
Cov cuab yeej cuab tam rau S355G5+M steel phaj:
| Thickness (hli) | |||||||
| S355G5+M | Tsawg dua los yog sib npaug li 16 | >16 Tsawg dua lossis sib npaug li 25 | >25 Tsawg dua lossis sib npaug li 40 | >40 Tsawg dua los yog sib npaug rau 63 | >63 Tsawg dua los yog sib npaug rau 100 | > 100 | |
| Yield zog (Ntau dua lossis sib npaug rau Mpa) | 355 | 345 | 345 | 345 | 345 | 345 | |
| Tsawg dua los yog sib npaug li 100 | > 100 | ||||||
| Tensile zog (Mpa) | 470-610 | 470-610 | |||||
Cov cuab yeej cuab tam rau S355G6+M steel phaj:
| Thickness (hli) | |||||||
| S355G6+M | Tsawg dua los yog sib npaug li 16 | >16 Tsawg dua lossis sib npaug li 25 | >25 Tsawg dua lossis sib npaug li 40 | >40 Tsawg dua los yog sib npaug rau 63 | >63 Tsawg dua los yog sib npaug rau 100 | > 100 | |
| Yield zog (Ntau dua lossis sib npaug rau Mpa) | 355 | 345 | 345 | 345 | 345 | 345 | |
| Tsawg dua los yog sib npaug li 100 | > 100 | ||||||
| Tensile zog (Mpa) | 470-610 | 470-610 | |||||
Tshuaj muaj pes tsawg leeg rau S355G5+M steel phaj
| Cov ntsiab lus tseem ceeb ntawm S355G5+M steel phaj | ||||||
| C | Si | Mn | P | S | Cr | Mo |
| 0.14 | 0.50 | 1.60 | 0.035 | 0.030 | - | 0.20 |
| Ni | Alt min. | Cu | N | Nb | Ti | V |
| 0.30 | 0.020 | - | 0.015 | 0.050 | 0.050 | 0.10 |
Tshuaj muaj pes tsawg leeg rau S355G6+M steel phaj
| Cov ntsiab lus tseem ceeb ntawm S355G6+M steel phaj | ||||||
| C | Si | Mn | P | S | Cr | Mo |
| 0.14 | 0.50 | 1.60 | 0.030 | 0.025 | - | 0.20 |
| Ni | Alt min. | Cu | N | Nb | Ti | V |
| 0.30 | 0.020 | - | 0.015 | 0.050 | 0.050 | 0.10 |
