S275N thiab S275NL yog qhov zoo-cov khoom siv hlau raws li EN 10025-3, sib faib tawm lub zog (275 MPa) tab sis qhov sib txawv ntawm kev cuam tshuam toughness: S275N raug kuaj ntawm -20℃(47J), thaum S275NL muaj kev ua tau zoo dua, kuaj ntawm -50 degree, ua rau nws txias dua S275NL kuj tseem muaj kev txwv nruj dua ntawm cov pa roj carbon thiab sulfur rau txhim kho weldability.
S275N thiab S275NL ob qho tib si yog qhov zoo li qub -cov khoom siv hlau uas tsim los rau kev tsim kho welded, muab cov weldability zoo thiab lub zog.
Txawm li cas los xij, S275NL muab kev txhim kho qis -kub toughness piv rau S275N, ua rau nws haum rau ib puag ncig hnyav.
Peb daim hlau raug xa mus rau hauv cov xwm txheej zoo li qub lossis ua kom zoo dua qub kom ntseeg tau tias kev ua tau zoo dua.
S275N thiab S275NL yog tsawg- alloy, nplua- cov khoom siv hlau raws li EN 10025-3 (designations 1.0490 thiab 1.0491, feem). Tus "S" qhia txog cov qauv hlau, "275" qhia txog qhov tsawg kawg nkaus tawm lub zog ntawm 275 MPa, "N" txhais tau hais tias kev xa khoom zoo ib yam, thiab "L" hauv S275NL qhia txog kev ntsuas qhov ntsuas kub tsawg.
Thaum lawv sib faib cov txiaj ntsig zoo ib yam thiab cov kev xav tau lub zog tensile, qhov sib txawv tseem ceeb nyob hauv Charpy V-notch cuam tshuam lub zog kuaj: S275N ntawm -20℃piv rau S275NL ntawm -50℃. Qhov no ua rau S275NL zoo tagnrho rau arctic lossis sub-zero daim ntawv thov, whereas S275N txaus rau cov huab cua nruab nrab. Piv nrog rau cov qib siab dua li en 10025 3 s355n normalized structural steel phaj, ob qho tib si muaj kev xaiv zoo rau cov qauv weldable.
Chemical Composition Sib txawv
|
Element |
Cim |
S275N Min (%) |
S275N Max (%) |
S275NL Min (%) |
S275NL Max (%) |
|---|---|---|---|---|---|
|
Cov pa roj carbon |
C |
- |
0.18 |
- |
0.16 |
|
Silicon |
Si |
- |
0.40 |
- |
0.40 |
|
Manganese |
Mn |
0.50 |
1.50 |
0.50 |
1.50 |
|
Nickel |
Ni |
- |
0.30 |
- |
0.30 |
|
Phosphorus |
P |
- |
0.030 |
- |
0.025 |
|
Sulfur |
S |
- |
0.025 |
- |
0.020 |
|
Chromium |
Cr |
- |
0.30 |
- |
0.30 |
|
Molybdenum |
Mo |
- |
0.10 |
- |
0.10 |
|
Vanadium |
V |
- |
0.05 |
- |
0.05 |
|
Nitrogen |
N |
- |
0.015 |
- |
0.015 |
|
Niobium |
Nb |
- |
0.05 |
- |
0.05 |
|
Titanium |
Ti |
- |
0.05 |
- |
0.05 |
|
Aluminium |
Al |
0.02 |
- |
0.02 |
- |
|
Tooj |
Cu |
- |
0.55 |
- |
0.55 |
|
CEV |
- |
- |
0.40 |
- |
0.40 |
Mechanical Properties Sib piv
|
Nominal Thickness (hli) |
Yield Strength ReH Min (MPa) - Ob leeg |
Tensile Strength Rm (MPa) - Ob leeg |
Elongation A Min (%) - Ob leeg |
Charpy KV Longitudinal Min (J) S275N ntawm -20 degree |
Charpy KV Longitudinal Min (J) S275NL ntawm -50 degree |
Charpy KV Transverse Min (J) S275N ntawm -20 degree |
Charpy KV Transverse Min (J) S275NL ntawm -50 degree |
|---|---|---|---|---|---|---|---|
|
Tsawg dua los yog sib npaug li 16 |
275 |
370–510 |
24 |
47 |
27 |
31 |
16 |
|
16 |
265 |
370–510 |
24 |
47 |
27 |
31 |
16 |
|
40 |
255 |
370–510 |
24 |
47 |
27 |
31 |
16 |
|
63 |
245 |
370–510 |
23 |
47 |
27 |
31 |
16 |
|
80 |
235 |
370–510 |
23 |
47 |
27 |
31 |
16 |
|
100 |
225 |
350–480 |
23 |
47 |
27 |
31 |
16 |
|
150 |
215 |
350–480 |
23 |
47 |
27 |
31 |
16 |
|
200 |
205 |
350–480 |
23 |
47 |
27 |
31 |
16 |
S275N thiab S275NL sib npaug zog (205-275 MPa tawm los) thiab weldability nyob rau hauv EN 10025-3 tab sis txawv feem ntau nyob rau hauv tej yam toughness: -20℃rau S275N piv rau -50℃rau S275NL, nrog S275NLmistry 's tighter. Xaiv S275N rau cov xwm txheej nruab nrab thiab S275NL rau qhov txias txias, ua kom pom kev nyab xeeb thiab ua haujlwm tau zoo hauv kev siv cov qauv.
