SA572 Qib 50yog 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 yam tsawg kawg nkaus yield zog ntawm 50,000 psi (345 MPa) thiab siv rau nws kim heev, du thiab du. nqi-effectiveness.
SA572 Qib 50 yog siab -lub zog qis- alloy (HSLA) cov qauv hlau txhais los ntawm ASTM. Nws cov khoom sib npaug muaj zog ntau dua li cov hlau me me (A36) nrog zoo weldability thiab formability.
Ntawm no yog nws cov khoom tseem ceeb thiab tshuaj lom neeg raws li tus qauv ASTM A572.
Mechanical Properties (Qhov tsawg kawg nkaus Guaranteed Values)
Yield & Tensile Strength (Vary raws li cov khoom daim ntawv)
Phaj, Bars, thiab Shapes (txog 4 nti./100 mm tuab):
Yield zog (min): 50,000 psi (345 MPa)
Tensile zog (min): 65,000 psi (450 MPa)
Phaj (tshaj 4 nti mus rau 5 nti. / 100-125 mm tuab):
Yield zog (min): 46,000 psi (315 MPa)
Tensile zog (min): 65,000 psi (450 MPa)
Phaj (ntau tshaj 5 nti rau 8 nti. / 125-200 mm tuab):
Yield zog (min): 42,000 psi (290 MPa)
Tensile zog (min): 63,000 psi (435 MPa)
Ductility
Elongation (min): Nws txawv ntawm hom qauv, feem ntau 18-21% nyob rau hauv 2 ntiv tes (50 hli), qhia tias zoo ductility rau txoj kev.
Impact Toughness
Tsis xav tau los ntawm lub hauv paus specification. Kev ntsuam xyuas cuam tshuam (Charpy V-notch) tsuas yog yuav tsum tau yog tias tus neeg yuav khoom tau teev tseg los ntawm Kev Xav Tau Ntxiv S5. Qhov no yog qhov sib txawv tseem ceeb los ntawm ntau qib European qhov uas yuav tsum tau muaj zog.
Lwm yam Standard Physical Properties
Modulus ntawm Elasticity: ~ 29,000 ksi (200 GPa)
Ceev: 0.283 lb/in³ (7850 kg/m³)
Poisson tus piv: ~ 0.29
Ntsiab Khoom Summary & Sib piv
| Khoom | SA572 Qib 50 | Cov hlau me me (A36) | Kev cuam tshuam |
|---|---|---|---|
| Yield zog | 50 ksi (345 MPa) | 36 ksi (250 MPa) | ~ 39% muaj zog duatshaj A36. Ua kom sib zog, ua haujlwm zoo dua. |
| Tensile zog | 65 ksi min (450 MPa) | 58-80 ksi (400-550 MPa) | Ntau yam tsawg kawg nkaus lav lub zog. |
| Toughness | Optional (Ntxiv S5) | Tsis xav tau | Yuav tsum tau teev yog tias xav tau rau qis-kev pabcuam kub. |
| Weldability | Zoo (nrog cov txheej txheem) | Zoo heev | Yuav tsum muaj tsawg -hydrogen xyaum thiab feem ntau preheat. |
| Thawj Qhov Zoo | Siab zog - rau - Qhov hnyav piv | Tus nqi qis, Ib qho yooj yim Fabrication | Qhov zoo tshaj plaws qhov kev txuag qhov hnyav lossis hnyav dua yog qhov tseem ceeb. |
Kev siv ntau:
Cov choj, lub tsev thav duab, cov kav hlau txuas, cov cuab yeej tsim kho, thiab lwm cov qauv uas nws lub zog siab dua tso cai rau kev txo qhov hnyav thiab muaj peev xwm thauj khoom ntau dua A36.
Hauv cov ntsiab lus, SA572 Qib 50 qhov kev txhais cov khoom yog nws cov txiaj ntsig siab ua tiav los ntawm micro-alloying, zoo ductility, thiab xaiv toughness- ua rau nws muaj ntau yam, nqi- kev xaiv zoo rau siab - kev ua haujlwm ntawm cov qauv siv.
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.
