SA572 Qib 50 yog High-Strength Low-Alloy (HSLA) structural steel paub txog nws lub zog zoo heev-rau- hnyav piv, weldability zoo, thiab txhim kho atmospheric corrosion kuj, featuring ib tug tsawg kawg nkaus yield zog ntawm 50,000 psi nyob rau hauv hnyav siv, thiab 34 extensive cov cuab yeej nws durability thiab nqi -effectiveness.
Cov yam ntxwv tseem ceeb:
Hom:HSLA Steel (High-Lub zog qis-Alloy).
Lub zog:Yam tsawg kawg nkaus lub zog ntawm 50 ksi (50,000 psi lossis 345 MPa) thiab tensile zog ntawm 65 ksi (65,000 psi).
Alloying:Muaj cov ntsiab lus zoo li columbium (niobium) thiab vanadium, muab nws lub zog zoo dua thiab tiv thaiv corrosion piv rau cov pa roj carbon zoo li A36.
Corrosion Resistance:Muaj kev tiv thaiv zoo rau atmospheric corrosion dua li cov qauv carbon steels.
Weldability:Haum rau welded, riveted, los yog bolted lug, txawm tias nws cov ntsiab lus alloy siab dua ua rau kev sib sau nyuaj dua A36.
SA572 Qib 50 feem ntau suav hais tias yog sib npaug rau European steel qib S355, raws li qhov sib piv cov khoom siv zog. Txawm li cas los xij, qhov sib npaug tsis zoo tag nrho vim qhov sib txawv tseem ceeb hauv qhov yuav tsum tau muaj kev cuam tshuam toughness ntawm cov qauv.
Nov yog cov ncauj lus kom ntxaws thiab qhov sib tw ze tshaj plaws:
1. Lub zog ze tshaj plaws - Raws li qhov sib npaug: S355 (EN 10025-2)
| Qib | Yam tsawg kawg nkaus tawm lub zog (rau t Tsawg dua lossis sib npaug li 16 hli) | Qhov Tseem Ceeb Zoo sib xws |
|---|---|---|
| SA572 Qib 50 | 345 MPa (50 ksi) | Lub zog yog thawj qhov sib tw. Qhov nominal 10 MPa qhov sib txawv ntawm S355's 355 MPa yog negligible nyob rau hauv feem ntau tsim. |
| S355JR / J0 / J2 | 355 MPa rau | Ob leeg yog siab -lub zog steels rau txuas hniav, vaj tse, thiab kev tsim kho. |
2. Qhov txawv ntawm qhov tseem ceeb: cuam tshuam rau kev sib tw
Qhov no yog qhov sib txawv loj uas cuam tshuam qhov sib npaug tiag.
| Khoom | SA572 Qib 50 | European S355JR/J2 |
|---|---|---|
| Charpy Impact Test | Tsis yuav tsum tau nyob rau hauv lub hauv paus specification. Yuav tsum tau thov kom meej raws li Kev Xav Tau Ntxiv (S5). | Yuav tsum tau. Lub ntsiab lus (J0=0℃, J2=-20} degree) txhais qhov ntsuas kub thiab lav lub zog (27 J min). |
Yog li ntawd, kom muaj kev sib npaug tag nrho, SA572 Gr. 50 yuav tsum tau txiav txim nrog Supplementary Requirement S5 rau kev ntsuam xyuas ntawm qhov ntsuas kub.
3. Yuav ua li cas qhia qhov tseeb European sib npaug
Yuav kom phim SA572 Qib 50 nrog qib European, koj yuav tsum txiav txim siab yam khoom twg yog qhov tseem ceeb:
Rau kev sib piv yield zog nkaus xwb (feem ntau kev xyaum):
Siv S355JR (kuaj ntawm +20℃) lossis S355J0 (kuaj ntawm 0℃).
Rau kev sib piv ob lub zog thiab ib txwm qis -kub toughness:
Siv S355J2 (kuaj ntawm -20℃, 27 J min). Qhov no feem ntau yog qhov tsim nyog tshaj plaws "zoo li-zoo li" hloov pauv hauv kev tsim qauv.
Rau siab dua / weldability:
Siv S355K2 (kuaj ntawm -20℃, 40 J min) los yog S355N / NL (normalized, kuaj ntawm qis dua).
4. Lwm Cov Qib European Muaj Peev Xwm (Cov ntsiab lus)
Rau Cov Txheej Txheem Hollow: Siv EN 10210 S355J2H (kub-tiav) lossis EN 10219 S355J2H (txias-tsim).
Tsis muaj qhov sib npaug: S275 (275 MPa tawm los) tsis muaj zog thiab sib npaug rau qis dua - lub zog US qib.
Tsis muaj qhov sib npaug: S450 lossis S690 muaj zog dua thiab sib npaug rau US qib xws li A514.
Summary Table of Primary Equivalents
| Yog tias koj xav tau SA572 Gr. 50 nrog ... | Qhia txog qib European no (EN 10025-2) |
|---|---|
| Zoo sib xws zog nkaus xwb | S355JR or S355J0 |
| Zoo sib xws zog + Txheem Tsawg-Tsub Toughness | S355J2 (Qhov no yog qhov ncaj tshaj plawsua haujlwmsib npaug) |
| Zoo sib xws muaj zog + siab dua toughness | S355K2 los yog S355N |
1. Dab tsi yog SA572 Qib 50 Hlau?
SA572 Qib 50 yog qhov siab -lub zog qis- alloy (HSLA) cov qauv hlau tau teev tseg los ntawm ASTM, nrog rau qhov tsawg kawg nkaus lub zog ntawm 50 ksi (345 MPa), muab lub zog zoo dua - rau - qhov hnyav piv dua li cov qauv carbon steel zoo li A36.
2. Dab tsi yog qhov Yield Strength ntawm SA572 Qib 50?
Qhov tsawg kawg nkaus lub zog ntawm SA572 Qib 50 yog 50,000 psi (345 MPa), uas siv rau cov khoom thicknesses txog li 4 ntiv tes (100 hli). Rau cov phaj tuab, qhov tsawg kawg nkaus tawm lub zog txo mus rau 46 ksi (315 MPa).
3. Puas yog SA572 Qib 50 Weldable?
Yog lawm, SA572 Qib 50 muaj qhov zoo weldability. Nws yuav tsum muaj cov qauv qis- hydrogen vuam cov kev coj ua thiab tej zaum yuav xav tau preheating rau cov seem tuab los yog nyob rau hauv huab cua txias los tiv thaiv hydrogen-induced cracking thiab tswj cov khoom nyob rau hauv lub tshav kub- cheeb tsam cuam tshuam.
4. Qhov txawv ntawm A572 thiab A992 Hlau yog dab tsi?
A572 Gr. 50 yog cov khoom siv tshwj xeeb rau daim hlau, tuav, thiab cov duab. A992 yog qhov tshwj xeeb tshiab tshwj xeeb rau dav - flange qauvcov duab(W-beams), nrog lub zog siab tshaj plaws (65 ksi) thiab qhov yuav tsum tau muaj Charpy toughness, ua rau nws yog qhov kev xaiv zoo tshaj plaws rau niaj hnub tsev thav ntawv.
5. Dab tsi yog SA572 Qib 50 sib npaug rau Tebchaws Europe?
Qhov sib npaug nyob sab Europe zoo tshaj plaws yog S355JR/J0/J2 (EN 10025-2), nrog rau lub zog nominal ntawm 355 MPa. Txawm li cas los xij, qhov yuav tsum tau muaj kev cuam tshuam hnyav ntawm S355 qib qis (piv txwv li, J2 rau -20 degree) yuav tsum tau sib npaug rau qhov sib npaug.
6. Qhov twg yog SA572 Qib 50 nquag siv?
Nws yog dav siv nyob rau hauv txuas hniav, lub tsev thav duab, kis tau tus mob, cov cuab yeej siv, thiab lwm yam kev siv cov txheej txheem uas muaj zog dua thiab hnyav npaum li cas ntawm A36 steel.
7. Cov tshuaj muaj pes tsawg leeg ntawm SA572 Qib 50 yog dab tsi?
Nws cov chemistry suav nrog txwv rau Carbon (max 0.23%), Manganese (1.35% max), Phosphorus (0.04% max), Sulfur (0.05% max), thiab tej zaum yuav muaj micro-alloys xws li Columbium (Nb) lossis Vanadium (V) rau lub zog.
8. Puas yog SA572 Qib 50 puas muaj kev cuam tshuam rau kev ua kom tawv nqaij?
Tsis nyob rau hauv lub hauv paus specification. Impact toughness (Charpy test) tsuas yog yuav tsum tau teev tseg los ntawm tus neeg yuav khoom siv cov kev xav tau ntxiv, tsis zoo li ntau qib European uas nws yuav tsum tau ua.
9. SA572 Qib 50 puas tuaj yeem Galvanized?
Yog, nws haum rau kub -dip galvanizing. Tsim nyog steel chemistry (tshwj xeeb yog silicon thiab phosphorus cov ntsiab lus) thiab kev tswj cov txheej txheem yog tsim nyog los xyuas kom meej ib tug uniform, adherent txheej.
10. Qhov txawv ntawm SA572 thiab A572 Qib 50 yog dab tsi?
Tsis muaj kev sib txawv. A572 yog tus qauv ASTM. SA572 yog cov lus qhia zoo ib yam uas tau txais los ntawm ASME Boiler thiab Pressure Vessel Code rau kev siv hauv lub nkoj siab thiab boiler kev tsim kho, xav tau ASME- ntawv pov thawj raws.
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.
