S275J0 cov khoom sib npaug yog dab tsi?
Cov ntaub ntawv sib npaug rauS275J0steel sib txawv raws cheeb tsam tus qauv. Nws yog European uas tsis yog{1}} alloy cov qauv hlau txhais los ntawm EN 10025-2: 2019, nrog rau cov yam ntxwv tseem ceeb ntawm 275 MPa yam tsawg kawg nkaus yield zog thiab cuam tshuam toughness kuaj ntawm 0℃.
S275J0 khoom yog dab tsi?
S275J0 yog cov qauv European (EN 10025-2) cov qauv hlau nrog qhov tsawg kawg nkaus tawm lub zog ntawm 275 MPa thiab lav qhov cuam tshuam qhov hnyav ntawm 27 Joules ntawm 0 degree, nrog cov sib npaug xws li DIN St44-3U, ASTM A572 Qib 42, thiab JIS cov khoom muaj pes tsawg leeg, txawm hais tias qee qhov tshwj xeeb SM4. specifications yog qhov tseem ceeb rau kev xaiv zaum kawg.
Ntawm no yog nws thawj qhov sib npaug thoob ntiaj teb, categorized los ntawm tus qauv:
1. Suav sib npaug (Ntau yam nug)
Raws li lub teb chaws Suav tam sim no tus qauv GB / T 1591-2018 ("High zog low alloy structural steels"):
Direct sib npaug: Q275C
Q275: Tsawg tshaj tawm lub zog ntawm 275 MPa.
C: Qib zoo, uas xaiv qhov kev ntsuam xyuas cuam tshuam ntawm 0℃nrog lub zog yam tsawg kawg nkaus ntawm Ntau dua lossis sib npaug rau 34 J (me ntsis siab dua li 27 J xav tau rau S275J0, ua rau nws tsis tshua muaj zog hauv toughness).
Lus Cim Tseem Ceeb: Cov txheej txheem Suav qub GB / T 1591-2008 siv qib Q275C ib yam nkaus, tab sis qhov txiaj ntsig ntawm lub zog muaj zog sib txawv me ntsis. Ib txwm qhia lub xyoo txheem. GB / T 1591-2018 tam sim no yog qhov siv tau.
2. Lwm yam tseem ceeb thoob ntiaj teb sib npaug
| Region/Standard | Qib sib npaug | Qhov Tseem Ceeb Zoo sib xws | Cov Lus Cim Tseem Ceeb |
|---|---|---|---|
| International (ISO) | ISO 630-2: 2021, E275C | Lub zog (275 MPa) & Kev cuam tshuam ntawm 0 degree. | Cov txheej txheem ISO tau zoo sib xws nrog EN cov qauv. Lub npe yog ze li qub. |
| Tebchaws Asmeskas (ASTM) | ASTM A36 / A36M / ASTM A36M / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / A36M / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / A36M / ASTM A36 / ASTM A36 / ASTM A36 / A36M / ASTM A36 / ASTM A36 / A36M / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / ASTM A36 / A36M / ASTM A36 / ASTM A36 / ASTM A36) thiab ASTM A36 | Zoo sib xws lub zog ntau thiab kev siv cov qauv siv. | Tsis muaj qhov sib npaug. A36 muaj qhov tawm los ntawm 250 MPa (min) tab sis tsis muaj qhov kev ntsuas cuam tshuam ntawm 0℃. Rau qis -kev pabcuam kub, ASTM A709 Gr. 36 nrog Charpy yuav tsum tau. |
| United Kingdom (BS) | TS EN 10025-2: S275J0 | Ib yam. | Lub UK tau txais cov European EN cov qauv. Nws yog tib yam khoom. |
| Lub teb chaws Yelemees (DIN) | DIN EN 10025-2: S275J0 | Ib yam. | Ib yam li saum toj no. Lub qub DIN 17100 tus qauv muaj St44-2, tab sis qhov no yog siv tsis tau. |
| Nyiv (JIS) | JIS G3101 SS400 los yog JIS G3106 SM400A/B | Zoo sib xws muaj zog ntau yam. | Tsis yog qhov sib npaug ncaj qha. SS400 / SM400A muaj qhov yuav tsum tau muaj zog tensile (~ 400-510 MPa) tab sis tsis muaj cov ntsiab lus tawm los lossis qhov cuam tshuam qis. Kev sib tw ze dua yuav yog SM490A / B, tab sis lub zog siab dua. Precise equivalence xav tau cov ncauj lus kom ntxaws specification sib piv. |
Cov ntsiab lus tseem ceeb rau kev xaiv cov khoom siv & hloov pauv
1.Qhov "J0" yog qhov tseem ceeb:Thaum tshawb nrhiav qhov sib npaug, qhov cuam tshuam toughness ntawm 0℃tseem ceeb npaum li lub zog. Ib qib uas muaj lub zog raug tab sis tsis muaj ntawv pov thawj toughness (xws li A36 yooj yim) tsis yog ib qho kev nyab xeeb hloov rau cov qauv raug rau hauv huab cua txias.
2.Chemical Composition Variances:Thaum cov khoom siv sib xyaw ua ke, qhov tso cai rau cov khoom xws li Carbon (C), Manganese (Mn), Phosphorus (P), thiab Sulfur (S) yuav txawv ntawm cov qauv. Qhov no tuaj yeem cuam tshuam rau weldability thiab fabrication txheej txheem.
3.Certification yog Qhov Tseem Ceeb:Rau cov haujlwm tseem ceeb, kev hloov pauv yuav tsum yog raws li daim ntawv pov thawj Mill Test Reports (MTRs) uas txheeb xyuas cov khoom ua tau raws li qhov xav tau ntawm cov khoom siv kho tshuab thiab tshuaj lom neeg ntawm qib uas tau teev tseg, tsis yog ntawm tus ntoo khaub lig- cov lus qhia.
4.Rau vuam nyob rau hauv txias huab cua:S275J0 / Q275C tau xaiv tshwj xeeb rau nws qhov kev ua tau zoo ntawm 0 degree. Kev siv qhov tsis yog - cuam tshuam - qhov sib npaug ntawm qhov ntsuas tuaj yeem ua rau muaj kev pheej hmoo ntawm kev tawg tawg hauv tshav kub- thaj tsam cuam tshuam thaum lub caij ntuj no kev tsim kho lossis kev pabcuam.
Xaus
Qhov ncaj tshaj thiab txhim khu kev qha sib npaug rau S275J0 yog Q275C raws li GB / T 1591-2018 (Tuam Tshoj) lossis E275C raws li ISO 630-2: 2021 (International).
Rau kev yuav khoom lossis tsim qauv hauv Asmeskas kev ua lag luam, koj yuav tsum qhia txog qhov cuam tshuam - qib xeem xws li ASTM A709 Qib 36 nrog rau Charpy V - qhov xav tau ntawm qhov ntsuas kub ntawm qhov xav tau, raws li cov qauv ASTM A36 tsis yog qhov sib npaug ncaj qha.
Nco ntsoov sab laj tag nrho cov lus qhia tshwj xeeb thiab koom nrog cov khoom siv hluav taws xob thaum hloov cov qhab nia hla cov qauv sib txawv, tshwj xeeb tshaj yog rau kev nyab xeeb - cov qauv tseem ceeb lossis cov khoom siv tsis muaj zog.
1. Lub ntsiab lus ntawm "J0" hauv S275J0 yog dab tsi?
Lub "J0" qhia tias cov hlau raug tua tag nrho (deoxidized) thiab muaj qhov tshwj xeeb cuam tshuam qhov hnyav ntawm tsawg kawg 27 joules thaum kuaj ntawm 0 degree. Lub "J" txhais tau hais tias tua cov hlau nrog lav qhov cuam tshuam tus nqi, thiab "0" qhia qhov ntsuas kub.
2. Dab tsi yog qhov txawv ntawm S275J0 thiab S275J2?
Qhov sib txawv tseem ceeb yog qhov ntsuas kub ntawm qhov ntsuas kub: S275J0 yog kuaj ntawm 0 degree, thaum S275J2 kuaj ntawm -20 degree. Qhov no ua rau S275J2 haum rau cov kev pabcuam txias dua li S275J0.
3. Puas yog S275J0 haum rau kev tsim kho lub caij ntuj no?
S275J0 feem ntau haum rau lub caij ntuj no me me uas qhov kub tsis tshua muaj qis qis qis qis. Rau qhov sib xws sub-zero kub, S275J2 lossis S275J2+N (normalized) yuav yog qhov kev xaiv zoo dua vim lawv qhov kub thiab txias.
4. Lub zog tawm ntawm S275J0 yog dab tsi?
S275J0 muaj qhov tsawg kawg nkaus tawm lub zog ntawm 275 MPa rau tuab txog 16 hli, zoo ib yam rau lwm qib S275. Lub zog txo qis nrog nce cov khoom tuab raws li tau teev tseg hauv EN 10025-2.
5. S275J0 puas tuaj yeem welded yooj yim?
Yog lawm, S275J0 muaj qhov zoo weldability zoo ib yam li lwm yam S275 tua steels, nrog cov ntsiab lus carbon feem ntau qis dua 0.20% thiab homogeneous microstructure uas teb tau zoo rau cov txheej txheem vuam tsis muaj ua ntej - cua sov rau feem ntau daim ntawv thov.
6. S275J0 feem ntau siv qhov twg?
Nws yog feem ntau siv nyob rau hauv kev siv cov qauv siv nyob rau hauv temperate climates, xws li lub tsev thav duab, industrial platforms, thiab machinery kev txhawb nqa qhov twg muaj feem xyuam rau loading ntawm nruab nrab kub yog ib tug xav txog.
Tag nrho cov specification thiab cov ntsiab lus muaj nyob rau ntawm kev thov. Cov ntaub ntawv saum toj no yog muab rau kev taw qhia nkaus xwb. Rau kev tsim tshwj xeeb thov hu rau peb cov neeg ua haujlwm muag khoom.