S355NL thiab S420NL yog normalized los yog normalized-rolled nplua grain steel daim hlau tsim los rau European tus qauv EN 10025-3. Qhov "N" qhia txog qhov xwm txheej ntawm tus me nyuam los yog ua kom zoo li qub, thiab "L" tau lees tias muaj kev cuam tshuam rau qhov hnyav ntawm qhov kub qis (txog -50℃lossis -60 degree, nyob ntawm thickness). Cov qib no tau teev tseg rau cov txheej txheem welded ua haujlwm hauv cov huab cua txias lossis xav tau kev txhim kho toughness, xws li txuas hniav, cov qauv sab nrauv, cov hlab ntsha siab, thiab cov cuab yeej siv hnyav.
Qhov txawv tseem ceeb:
Qhov sib txawv ntawm qhov tseem ceeb yog lawv lub zog. S355NL muaj qhov tsawg kawg nkaus lub zog ntawm 355 MPa, thaum S420NL muab lub zog ntau dua ntawm 420 MPa (thiab muaj zog tensile ntau dua). Qhov no ua rau S420NL haum rau cov ntawv thov uas xav tau ntau dua load-cov kabmob muaj peev xwm.
Txhawm rau ua tiav lub zog siab dua thaum tuav cov qauv zoo thiab qis -kub toughness, S420NL siv cov tshuaj ua tib zoo tswj cov tshuaj muaj pes tsawg leeg. Qhov no suav nrog micro-alloying nrog cov ntsiab lus xws li Niobium (Nb) thiab / lossis Vanadium (V), uas muab cov nplej ua kom zoo dua qub thiab nag lossis daus ntxiv thaum lub sijhawm ua haujlwm zoo. Yog li ntawd, S420NL feem ntau muaj cov pa roj carbon ntau dua (Ceq) piv rau S355NL. Qhov no ua rau muaj kev xav tau ntau dua fabrication rau S420NL, tshwj xeeb tshaj yog rau vuam. Vuam S420NL feem ntau yuav tsum tau nruj me ntsis tswj ntawm preheating qhov kub thiab txias, kev siv uas tsim nyog tsawg- hydrogen consumables, thiab ceev faj tswj cov cua sov input kom khaws cov khoom toughness nyob rau hauv weld tshav kub- cuam tshuam cheeb tsam.
Tshuaj muaj pes tsawg leeg ntawm S355NL
|
Lub ntsiab |
Ladle Analysis (max%) |
Product Analysis (Max%) |
|---|---|---|
|
Cov pa roj carbon (C) |
0.18 |
0.20 |
|
Silicon (Si) |
0.50 |
0.55 |
|
Manganese (Mn) |
0.90-1.65 |
0.85-1.75 |
|
Phosphorus (P) |
0.025 |
0.035 |
|
Sulfur (S) |
0.015 |
0.025 |
|
Nitrogen (N) |
0.015 |
0.017 |
|
Aluminium (Al) |
0.020 (min, tag nrho) |
0.015 (min, tag nrho) |
|
Niobium (Nb) |
0.05 |
0.06 |
|
Vanadium (V) |
0.12 |
0.15 |
|
Titanium (Ti) |
0.05 |
0.06 |
|
Chromium (Cr) |
0.30 |
0.35 |
|
Nickel (Ni) |
0.30 |
0.35 |
|
Molybdenum (hli) |
0.10 |
0.13 |
|
Copper (Cu) |
0.55 |
0.60 |
Tshuaj muaj pes tsawg leeg ntawm S420NL
|
Lub ntsiab |
Ladle Analysis (max%) |
Product Analysis (Max%) |
|---|---|---|
|
Cov pa roj carbon (C) |
0.20 |
0.22 |
|
Silicon (Si) |
0.60 |
0.65 |
|
Manganese (Mn) |
1.00-1.70 |
0.95-1.80 |
|
Phosphorus (P) |
0.025 |
0.030 |
|
Sulfur (S) |
0.020 |
0.025 |
|
Nitrogen (N) |
0.025 |
0.027 |
|
Aluminium (Al) |
0.020 (min, tag nrho) |
0.015 (min, tag nrho) |
|
Niobium (Nb) |
0.05 |
0.06 |
|
Vanadium (V) |
0.20 |
0.22 |
|
Titanium (Ti) |
0.05 |
0.06 |
|
Chromium (Cr) |
0.30 |
0.35 |
|
Nickel (Ni) |
0.80 |
0.85 |
|
Molybdenum (hli) |
0.10 |
0.12 |
|
Copper (Cu) |
0.55 |
0.60 |
Mechanical Properties ntawm S355NL
|
Thickness (hli) |
Yield zog (min, MPa) |
Tensile zog (MPa) |
Elongation (min,%) |
Lub zog cuam tshuam (min, J @ -50 degree) |
|---|---|---|---|---|
|
Tsawg dua los yog sib npaug li 16 |
355 |
470-630 |
22 |
27 |
|
16<> |
345 |
470-630 |
22 |
27 |
|
40<> |
335 |
470-630 |
22 |
27 |
|
63<> |
325 |
470-630 |
21 |
27 |
|
80<> |
305 |
470-630 |
21 |
27 |
|
100<> |
285 |
450-610 |
21 |
27 |
|
150<> |
265 |
450-610 |
21 |
27 |
|
200<> |
245 |
450-610 |
21 |
27 |
Mechanical Properties ntawm S420NL
|
Thickness (hli) |
Yield zog (min, MPa) |
Tensile zog (MPa) |
Elongation (min,%) |
Lub zog cuam tshuam (min, J @ -50 degree, Longitudinal) |
|---|---|---|---|---|
|
Tsawg dua los yog sib npaug li 16 |
420 |
520-680 |
19 |
27 |
|
16<> |
400 |
520-680 |
19 |
27 |
|
40<> |
390 |
520-680 |
19 |
27 |
|
63<> |
380 |
520-680 |
19 |
27 |
|
80<> |
360 |
520-680 |
19 |
27 |
|
100<> |
340 |
500-650 |
19 |
27 |
|
150<> |
330 |
500-650 |
19 |
27 |
