DNV D620 thiab DNV D690 yog qib siab - lub zog, qis- alloy (HSLA) shipbuilding / marine structural steel, nrog rau qhov sib txawv ntawm lawv lub zog: DNV D690 muaj cov txiaj ntsig siab dua thiab lub zog tensile (ib puag ncig 690 MPa) dua li DNV6 620 (d 690 MPa), uas tsim nyog rau DNV D620. ntau xav tau offshore / nkoj cov qauv xav tau lub zog zoo dua, thaum ob qho tib si muaj kev sib zog zoo rau thaj chaw marine.
Tshuaj muaj pes tsawg leeg ntawm Thaum tshav kub kub tsom xam rau Shipbuilding steel phaj NV D620 (Max %):
|
C |
Si |
Mn |
P |
S |
Al |
N |
|
0.20 |
0.10-0.55 |
1.7 |
0.030 |
0.030 |
0.015-0.08 |
0.02 |
|
Ni |
V |
Ti |
Cu |
B |
Nb |
Mo |
|
|
0.04-0.10 |
0.02 |
|
0.005 |
0.02-0.05 |
|
Tshuaj muaj pes tsawg leeg rau DNV Qib D690 nkoj steel (Tshav Kub Ntsuas Max%)
| Cov ntsiab lus tseem ceeb ntawm DNV Qib D690 | |||||
| C | Si | Mn | P | S | N |
| 0.20 | 0.55 | 1.70 | 0.030 | 0.030 | 0.02 |
Mechanical zog rau Shipbuilding steel phaj DNV D620:
|
Yield zog (Mpa) |
Tensile zog (Mpa) |
Hlau Mark |
|
620 |
720-890 |
NV D620 |
Cov cuab yeej cuab tam rau DNV Qib D690 shipbuilding steel qauv:
| Yield zog (Ntau dua lossis sib npaug rau Mpa) | Tensile zog (Mpa) | Impacting xeem |
| 690 | 770-940 | |
| -20 Centigrade |
Lub zog: D690 qhia txog qhov tsawg kawg nkaus lub zog ntawm kwv yees li 690 MPa (megapascals), thaum D620 muaj qhov tsawg kawg nkaus tawm lub zog nyob ib ncig ntawm 620 MPa.
Daim ntaub ntawv: Ob leeg yog siv rau hauv marine engineering, tab sis D690 lub zog siab dua suits hnyav dua -cov haujlwm ua haujlwm rau cov dej hiav txwv platforms, naval ships, thiab pipelines, thaum D620 ua haujlwm zoo sib xws, me ntsis hnyav, cov qauv tsim.
Cov qauv: Lawv poob rau hauv Det Norske Veritas (DNV) kev faib tawm rau marine steel, nrog 'D' qhia txog kev kho cua sov tshwj xeeb (Quenched & Tempered - QT) thiab '620'/'690' denoting lawv cov chav kawm muaj zog.
Hauv qhov tseeb, D690 yog qhov sib txawv ntawm D620, tsim los rau kev siv kev ntxhov siab ntau dua hauv cov dej hiav txwv hnyav.
