SIB 490yog cov txheej txheem kub kub-rolled steel txhais los ntawm Japanese Industrial Standard (JIS G 3101).
Ntawm no yog cov ncauj lus kom ntxaws txog yam khoom siv no, nws cov khoom, thiab nws qhov sib npaug.
1. Decoding lub npe "SS490"
SS:Stands rau "Steel Structure". Qhov no prefix qhia tias nws yog ib tug dav structural dov hlau.
490:Qhia qhov tsawg kawg nkaus tensile lub zog hauv MPa. Yog li, SS490 yuav tsum muaj lub zog tensile (TS lossis Rm) ntawm Ntau dua lossis sib npaug rau 490 MPa.
Lus Cim Tseem Ceeb:Tsis zoo li qee cov qauv (xws li Suav Q-series lossis European S-series), tus lej hauv JIS SS qib hais txog lub zog tensile, TSIS yield zog.
2. Cov khoom tseem ceeb (raws li JIS G 3101)
Tensile zog (Rm): Ntau dua lossis sib npaug li 490 MPa
Yield zog (ReH): Ntau dua lossis sib npaug li 325 MPa(Qhov no yog qhov tseem ceeb tsim lub zog tus nqi).
Elongation:Yam tsawg kawg yuav tsum tau sib txawv nrog tuab (feem ntau nyob ib ncig ntawm 17-21%).
Tshuaj muaj pes tsawg leeg:JIS G 3101 tsis qhia meej cov kev cai tshuaj lom neeg rau SS qib. Lub hom phiaj yog ua kom tau raws li qhov xav tau ntawm cov khoom siv kho tshuab, ua rau nws muaj cov pa roj carbon -manganese steel nrog cov ntsiab lus carbon (C) tsawg dua lossis sib npaug li 0.30%.
Qhov xwm txheej:Muab nyob rau hauv raws li -rolled (kub-rolled) mob.
3. Sib piv rau Cov Hlau Hlau
vs SS400:SS490 yog asiab dua -lub zog versionntawm feem ntau Japanese me me steel, SS400 (TS Ntau dua lossis sib npaug rau 400 MPa, YS Ntau dua lossis sib npaug rau 245 MPa).
vs Suav Q355 (Qub Q345):SS490 yog qhov zoo sib xws hauv qib zog. Q355B muaj lub zog tawm los ntawm ntau dua lossis sib npaug ntawm 355 MPa thiab lub zog tensile ntawm 470-630 MPa. SS490 muaj qhov siab dua me ntsisyam tsawg kawg nkaustensile lub zog (490 MPa) tab sis ib tug me ntsis qis zog yield zog (Ntau tshaj los yog sib npaug rau 325 MPa). Hauv kev xyaum, lawv feem ntau suav tias yog kev lag luam sib npaug rau ntau daim ntawv thov.
vs European S355 (eg, S355JR):S355JR yog txhais los ntawm nws qhov tsawg kawg nkaus yield zog ntawm 355 MPa, nrog tensile zog feem ntau ntawm 470-630 MPa. SS490 yog mechanically ze heev thiab dav siv raws li qhov sib npaug.
ASTM A36 / A572-50 Cov Lus Qhia:SS490 lub zog nyob nruab nrab ntawm cov qib American no.
A36:Lub zog qis (YS Ntau dua lossis sib npaug ntawm 250 MPa, TS 400-550 MPa).
A572 Gr.50:Ntau qhov sib npaug ncaj qha (YS Ntau dua lossis sib npaug rau 345 MPa, TS Ntau dua lossis sib npaug rau 450 MPa).
4. Common International Equivalents
| Standard (Lub teb chaws / cheeb tsam) | Common Equivalent Qib | Qhov tseem ceeb sib txawv/Note |
|---|---|---|
| JIS (Nyiv) | SIB 490(Base Qib) | Txhais los ntawm Tensile Strength (Ntau dua lossis sib npaug rau 490 MPa). |
| GB / T (Tuam Tshoj) | Q355B(GB/T 1591) | Qhov sib tw ze tshaj plaws. Txhais los ntawm Yield Strength (Ntau dua lossis sib npaug rau 355 MPa). |
| EN (Tebchaws Europe) | S355 JR(EN 10025-2) | Qhov sib tw ze tshaj plaws. Txhais los ntawm Yield Strength (Ntau dua lossis sib npaug rau 355 MPa). |
| ASTM (USA) | A572 Qib 50 | Nyob ze heev. A36 tsis muaj zog tab sis qee zaum hloov pauv. |
| DIN (Lub teb chaws Yelemees - Laus) | St52-3 | Cov keeb kwm sib npaug (tam sim no hloov los ntawm S355JR). |
5. Cov ntawv thov tseem ceeb
SS490 yog ntau yam, nruab nrab - lub zog steel siv dav hauv:
Kev tsim vaj tsev thiab choj:Rau thav duab, kab teeb, kab, thiab trusses.
General Machinery thiab Khoom Siv:Ncej, hauv paus, kev txhawb nqa.
Industrial Tsheb:Chassis Cheebtsam, tsheb thav duab, trailer qhov chaw.
Shipbuilding:Rau cov uas tsis yog- cov yam ntxwv tseem ceeb (cov phaj hull feem ntau siv siab dua -spec shipbuilding steel).
Cia Racks thiab Agricultural Equipment.
6. Cov ntsiab lus tseem ceeb
Weldability:Zoo, vim nws cov ntsiab lus carbon tsawg. Cov txheej txheem vuam txheej txheem siv.
Tsis xav tau kev cuam tshuam:Standard SS490 tsis muaj qhov yuav tsum tau ua rau Charpy cuam tshuam toughness. Rau cov ntawv thov uas xav tau qis- qhov kub thiab txias, lwm qib JIS xws li SM490 (JIS G 3106) lossis S355 nrog cov qib zoo (J, K, thiab lwm yam) yuav tsum tau teev tseg.
Formability:Nws muaj qhov nruab nrab formability tab sis tsis tshua muaj zog dua li qis dua - lub zog steels zoo li SS400.
Cov ntsiab lus:
SS490 yog tus qauv Japanese kub- dov cov qauv hlau nrog lub zog tensile yam tsawg kawg nkaus ntawm 490 MPa. Nws yog ib qho dav - lub hom phiaj, nruab nrab - lub zog steel dav siv hauv kev tsim kho thiab tshuab, piv rau cov qib thoob ntiaj teb xws li Tuam Tshoj Q355B thiab Europe S355JR. Nws lub ntsiab kom zoo dua yog qhov sib npaug zoo ntawm lub zog, weldability, thiab tus nqi. Rau qhov tseem ceeb dynamic lossis qis - cov ntawv siv kub, cov qhab nia tshwj xeeb ntau dua nrog kev lav paub yuav tsum tau txiav txim siab.