S690Q vsS690 qw: Kev txiav txim siab "L" hauv High-Strength Steel
(690 MPa Yield|EN 10025-6 Txuj)
Ob leeg S960QL thiab S960Q yog quenched thiab tempered siab - lub zog structural steels ua raws li European tus qauv EN 10025-6. Lawv qhia cov ntsiab lus tseem ceeb ntawm lub zog zoo sib xws, tab sis S960QL tau ua haujlwm tau zoo- kho kom haum rau qhov ntsuas kub qis -, ua rau muaj qhov sib txawv ntawm qhov kub thiab txias, cov tshuaj muaj pes tsawg leeg, thiab daim ntawv thov scenarios. Cov ncauj lus kom ntxaws sib piv yog raws li hauv qab no:
Qhov txawv ntawm qhov tseem ceeb: Tsawg-Tsub Toughness
S690Q: Yam tsawg kawg nkaus toughness kuaj ntawm -20℃(30J nruab nrab). → Hom Kev Siv: Cranes nyob rau hauv huab cua sov, cov khoom siv hauv av.
S690QL: Muaj ntawv pov thawj rau -40℃thiab qis dua (Ntau dua lossis sib npaug rau 40J cuam tshuam toughness). → Kev siv tseem ceeb: Arctic pipelines, offshore platforms, mining tsheb hauv Siberia. ⚠️ Kev pheej hmoo yuam kev: Siv S690Q hauv qab -20℃pheej hmoo tawg tawg (xws li Canadian drilling rig tawg hauv 2020).
Chemical & Processing txawv
ParameterS690QS690QLMax Sulfur (S) 0.025% 0.010%Z-Kev Ntsuas Kev Taw QhiaOptionalMandatory (Z15-Z35)CET* (Carbon Equivalent) Tsawg dua los yog sib npaug rau 0.47 Tsawg dua lossis sib npaug rau 0.45 (* CET) + CET {txhim kho qhov muaj peev xwm) (Mn+Mo)/10 + (Cr+Cu)/20 + Ni/40
Vim li cas qhov "L" Qhov Tseem Ceeb hauv Cov Haujlwm tiag
Offshore Cua Turbines: S690QL siv nyob rau hauv lub hauv paus ntawm -30℃seas (piv txwv li, Hornsea 2, UK). Cov khoom siv tsis ua haujlwm: 0.2% vs 5% rau S690Q.
Tus nqi cuam tshuam: S690QL tus nqi 15% ntau dua tab sis txuas ntxiv lub neej kev pab cuam los ntawm 8-12 xyoo nyob rau hauv ib puag ncig corrosive.
Vuam: S690QL yuav tsum nruj preheating (150-250 degree) tiv thaiv hydrogen cracking.
Ntiaj teb no Standards & Equivalents
Teb chaws Europe (EN 10025-6): S690Q=S690Q / S690QL=S690QL
Tuam Tshoj (GB/T 16270): S690Q ≈ Q690D / S690QL ≈ Q690E (qhib qis-temp yuav tsum tau)
TEB CHAWS USA (ASTM): Nyob ze - sib npaug rau A514 Qib Q (tab sis tsis tas yuav tsum xeem -40 degree).
Koj Daim Ntawv Txiav Txim Siab
Xaiv S690Q yog:
Ua haujlwm kub> -20 degree
Nyiaj txiag rhiab heev muaj nyob
Thickness <40 mm (tsis muaj Z-stress)
Hloov mus rau S690QL thaum:
Ambient temps Tsawg dua los yog sib npaug rau -40℃(piv txwv li, polar rigs)
Cov phaj tuab (Ntau dua lossis sib npaug li 40mm) tiv taus qhov sib tsoo
Hydrogen raug (pipelines, H₂ cia)
Dab tsi yog cov khoom sib npaug ntawm S960ql?
S960ql yog qib siab - lub zog muaj zog. ASTM S960ql sib npaug yog qhovASTM Q 345 Cov Lus Qhiaexhibiting zoo heev uas tsis muaj kub thiab txias stamping zog.
Dab tsi yog ST sib npaug ntawm S355 steel?
S355 Sib npaug Phaj Qib
ASTM tau txheeb xyuasA572-50Raws li kev hloov pauv tau txais S355. Ob qib muaj cov tshuaj lom neeg zoo sib xws thiab muaj siab -lub zog, qis- alloy structural steels.
Qib twg yog qhov zoo tshaj plaws hauv cov hlau?
1. Carbon Steel (Qib 1018)Cov pa roj carbon steel, tshwj xeeb yog Qib 1018, yog ib qho ntawm feem ntau siv cov qib steel vim nws cov weldability zoo, machinability, thiab pheej yig.
Qhov sib npaug ntawm S960ql yog dab tsi?
S960ql yog qib siab - lub zog muaj zog. ASTM S960ql sib npaug yog qhovASTM Q 345 Cov Lus Qhiaexhibiting zoo heev uas tsis muaj kub thiab txias stamping zog.