LR qib A steel yog ib hom kub dov dav dav tensile lub zog steel, thiab zoo li LR Qib B, LR Qib D thiab LR Qib E. LR steels tuaj 4 qib zoo tib yam - lub zog steel rau nkoj tsim thiab qib A yog qhov qis tshaj ntawm lawv. LR A qib steel phaj muaj lub zog ntawm 34,100 psi (235 MPa), thiab lub zog tensile kawg ntawm 58, 000 - 75, 500 psi (400-520 MPa).
LR Qib A shipbuilding Steel Daim Ntawv Thov:
LR A qib ntawm steel phaj yog yuav luag tsuas yog siv nyob rau hauv Shipbuilding Industry rau kev tsim kho ntawm cov qauv ntawm cov nkoj, barges thiab marine khoom. LR A Shipbuilding steel daim hlau kuj tuaj yeem siv rau kev kho nkoj, kev lag luam roj drilling platform, lub platform yeeb nkab txuas thiab lwm yam khoom.
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LR Lub Zog Muaj Zog Tshuaj Muaj Zog |
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Qib |
Cov ntsiab lus Max (%) |
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C |
Si |
Mn |
P |
S |
Al |
N |
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LR A |
0.21 |
0.50 |
2.5×C% |
0.035 |
0.035 |
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Nb |
V |
Ti |
Cu |
Cr |
Ni |
Mo |
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Crack Sensitivity: Pcm=(C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+}Mo/15+V/10+5B)%
Carbon sib npaug: Ceq=【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
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LR Cov cuab yeej muaj zog dav dav |
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Qib |
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Mechanical Property |
Charpy V Impact Test |
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Thickness |
Yield |
Tensile |
Elongation |
Qib |
Zog 1 |
Zog 2 |
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LR A |
mm |
Min Mpa |
Mpa |
Tsawg% |
20 |
J |
J |
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t Tsawg dua lossis sib npaug li 50 |
235 |
400-520 |
22% |
20 |
27 |
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50＜t Tsawg dua lossis sib npaug rau 70 |
235 |
400-520 |
22% |
24 |
34 |
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70＜t Tsawg dua lossis sib npaug rau 100 |
235 |
400-520 |
22% |
27 |
41 |
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Lus Cim: Lub Zog 1 yog qhov kev ntsuas cuam tshuam, Lub Zog 2 yog qhov ntev |
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