S275J0 yog tus qauv European (EN 10025-}2) tsis yog- alloy structural steel paub rau nws cov weldability zoo, lub zog (tsawg kawg 275 MPa tawm los), thiab cuam tshuam toughness mus rau 0 degree, qhia los ntawm "J0". Nws yog ntau yam khoom siv kub-kub siv hauv kev tsim kho, txuas hniav, tshuab, thiab kev tsim vaj tsev dav dav, muab kev sib npaug ntawm kev ua tau zoo thiab kev yooj yim, feem ntau muab cov khoom siv rau kev tsim kho.
Cov yam ntxwv tseem ceeb
TxujTS EN 10025-2 (Tebchaws Europe tus qauv).
Hom: Tsis yog - alloy structural steel.
Lub zog: Yam tsawg kawg nkaus tawm lub zog ntawm 275 MPa (megapascals).
Impact Test: Yuav tsum muaj Charpy qhov kev ntsuam xyuas yam tsawg kawg 27 Joules ntawm 0℃(zero degrees Celsius).
Weldability: Yooj yim weldable, ua rau nws haum rau ntau yam kev tsim kho.
Daim ntawv thov: Lub tsev, txuas hniav, kev tsim kho dav dav, engineering machinery (excavators, cranes), thiab lwm yam khoom siv.
Cov Qauv & Cov Qauv
Muab khoom raws li daim hlau, ntawv, seem, tuav, thiab rods.
Feem ntau xa tuaj rau hauv cov xwm txheej zoo li qub lossis tsis kho rau kev tsim kho, tab sis kuj tuaj yeem quenched thiab tempered.
Puas yog S275J0 sib npaug rau ASTM A572 Qib 50?
Tsis yog, S275J0 tsis sib npaug rau ASTM A572 Qib 50. Txawm hais tias ob qho tib si yog cov qauv hlau, lawv sib txawv hauv cov khoom tseem ceeb, tshuaj lom neeg muaj pes tsawg leeg, thiab kev tsim qauv. Nov yog qhov kev sib piv ntxaws:
Qhov txawv tseem ceeb:
| Khoom | S275J0 (EN 10025-2) | ASTM A572 Qib 50 (USA) |
|---|---|---|
| Yam tsawg kawg nkaus Yield Strength | 275 MPa (rau thickness Tsawg dua lossis sib npaug li 16 hli) | 345 MPa (50 ksi) |
| Tensile zog | 410-560 MPa | 450 - 550 MPa (≈65 ksi min) |
| Impact Toughness | Yuav tsum tau: 27 J ntawm 0 degree | Tsis xav tau los ntawm lub neej ntawd (tsuas yog hais txog Charpy ntxiv) |
| Kev tswj hwm tus qauv | Teb chaws Europe (EN) | Asmeskas (ASTM) |
| Kev sib xyaw ua ke | Tsis yog- alloy, hlau me me (C Tsawg dua lossis sib npaug rau 0.21%, Mn Tsawg dua lossis sib npaug li 1.50%) | High-lub zog qis- alloy (HSLA) steel, feem ntau nrog micro-alloying (piv txwv li, Nb, V) rau lub zog |
| Thawj Siv Case | Cov qauv dav dav hauv cov huab cua txias (txog 0 degree) | High -cov ntaub ntawv siv lub zog (piv txwv li, txuas hniav, cov tsev) qhov kev txo qhov hnyav yog qhov tseem ceeb |
Yog vim li cas lawv tsis sib npaug:
Lub zog sib txawv:
A572 Qib 50 muaj ≈25% siab dua qhov qis tshaj tawm lub zog (345 MPa vs . 275 MPa). Qhov no txhais tau hais tias A572 Qib 50 tuaj yeem nqa cov khoom hnyav dua lossis tso cai rau cov ntu sib dua rau tib lub thauj khoom piv rau S275J0.
Material Classification:
S275J0 yog cov hlau uas tsis yog- alloy steel nrog lub zog me me, tsim los rau weldability thiab toughness ntawm qhov kub thiab txias.
A572 Qib 50 yog siab -lub zog qis- alloy (HSLA) steel, optimized rau lub zog los ntawm micro-alloying ntsiab.
Toughness yuav tsum tau:
Lub "J0" nyob rau hauv S275J0 lav qhov cuam tshuam toughness ntawm 0 degree, ua rau nws haum rau qhov chaw txias.
Standard A572 Qib 50 tsis muaj qhov yuav tsum tau muaj kev cuam tshuam tshwj tsis yog hais meej meej nrog cov kev xav tau ntxiv (piv txwv li, rau cov choj hauv cheeb tsam txias).
Regional Standards:
Cov qhab nia suav nrog cov kev tswj hwm sib txawv (EN vs. ASTM) thiab feem ntau tau teev tseg raws li cov cai hauv cheeb tsam (Eurocodes vs. AISC/ASCE).
Qhov ze tshaj ASTM sib npaug rau S275J0:
Qhov ze tshaj ASTM qib nyob rau hauv cov nqe lus ntawm ob qho tib si yield zog thiab yuav tsum tau qis -kub toughness yog ASTM A709 Qib 36 (250 MPa tawm los nrog Charpy xeem ntawm 0℃los yog qis dua), tab sis lub zog tseem qis dua S275J0.
Xaus:
Thaum ob qho tib si steels siv hauv kev tsim kho, lawv tsis tuaj yeem hloov pauv yam tsis muaj kev ntsuam xyuas engineering. S275J0 tseem ceeb tshaj qhov txias-kub toughness ntawm nruab nrab lub zog, thaum A572 Qib 50 tseem ceeb dua lub zog nrog kev xaiv toughness. Kev hloov pauv yuav tsum tau txais kev pom zoo los ntawm tus kws tsim qauv tsim nyog thiab ua raws li txoj cai tsim nyog.
Tshuaj muaj pes tsawg leeg
| Variant | Ntxig | Weldability | C % | Mn% | P % | S % | Cu% | N % | |
|---|---|---|---|---|---|---|---|---|---|
| SIB 1312 | CC | CEVmax | Min | - | - | - | - | - | - |
| Pcmmax | Max | 0.17 | 1.40 | 0.040 | 0.040 | - | 0.0120 | ||
| S235JR EN10025-2 (ref.) | Std | CEV 0.35max | Min | - | - | - | - | - | - |
| pwm 0.25max | Max | 0.17 | 1.40 | 0.035 | 0.035 | 0.55 | 0.0120 |
S235JR: C max 0.20% rau qhov ntau thiab tsawg tshaj 40 hli. Tsuas yog CEV xav tau hauv tus qauv
1. S275J0 steel yog dab tsi?
S275J0 yog ib qho uas tsis yog- alloy structural steel qib ib EN 10025-2, nrog rau qhov tsawg kawg nkaus lub zog ntawm 275 MPa thiab lav qhov cuam tshuam toughness ntawm 0℃.
2. Qhov 'J0' hauv S275J0 txhais li cas?
Lub 'J0' qhia tias Charpy V- ntsuas qhov cuam tshuam ntawm 0 degree, kom ntseeg tau tias lub zog nqus tsawg kawg ntawm 27 Joules siv rau hauv qhov chaw txias.
3. Qhov txawv ntawm S275JR thiab S275J0 yog dab tsi?
S275JR raug kuaj xyuas ntawm +20 degree, thaum S275J0 raug kuaj ntawm 0 degree, ua J0 haum rau cov qauv raug rau ze - khov kub.
4. Cov ntawv thov tseem ceeb ntawm S275J0 yog dab tsi?
Nws yog siv rau hauv cov khoom siv rau cov txuas hniav, cov tsev, thiab sab nraum zoov infrastructure nyob rau hauv temperate climates qhov twg kub yuav poob mus rau 0 degree.
5. Lub zog tawm ntawm S275J0 yog dab tsi?
Qhov tsawg kawg nkaus yield zog yog 275 MPa rau thicknesses mus txog 16 hli, nrog txo qhov tseem ceeb rau thicker seem raws li tus qauv.
6. S275J0 puas tuaj yeem welded?
Yog lawm, S275J0 muaj weldability zoo. Txawm li cas los xij, preheating lossis tswj cov txheej txheem yuav raug pom zoo rau cov ntu tuab lossis vuam hauv cov xwm txheej txias.
7. Puas yog S275J0 sib npaug rau ASTM A572 Qib 50?
Tsis ncaj. Txawm hais tias ob qho tib si muaj lub zog zoo sib xws (~ 345 MPa rau A572 Gr 50 vs . 275 MPa rau S275J0), A572 Qib 50 muaj lub zog ntau dua thiab cov kev xav tau sib txawv.
8. Cov tshuaj muaj pes tsawg leeg ntawm S275J0 yog dab tsi?
Nws feem ntau muaj max 0.21% Carbon, max 1.50% Manganese, thiab tswj qib ntawm phosphorus thiab sulfur (piv txwv li, P Tsawg dua lossis sib npaug li 0.035%, S Tsawg dua lossis sib npaug li 0.035%).
9. Puas yog S275J0 corrosion resistant?
Tsis yog, S275J0 tsis yog corrosion- tiv taus thiab yuav tsum muaj cov txheej txheem tiv thaiv xws li pleev xim lossis galvanizing rau sab nraum zoov.
10. Qhov txawv ntawm S275J0 thiab S355J0 yog dab tsi?
S355J0 muaj qhov siab tshaj qhov ua tau zoo tshaj plaws (355 MPa) tab sis zoo sib xws cuam tshuam toughness ntawm 0 degree, ua rau nws muaj zog rau txias - huab cua kev siv.
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.
