SA572 qib 50 carbon kub dov steel phaj
SA572 Qib 50yog ib tug workhorse siab-lub zog qis- alloy (HSLA) cov qauv hlau, txawv ntawm ob qho tib si A36 me me thiab ultra-siab- zog A514 qib peb tau tham. Ntawm no yog cov ntaub ntawv qhia ntxaws ntawm SA572 Qib 50 Carbon Kub-Rolled Steel Sheet & Phaj.
SA572 Qib 50: Siab-Lub zog qis-Alloy (HSLA) Cov Qauv Hlau
SA572 Qib 50 yog siab -lub zog, qis-alloy (HSLA), columbium-vanadium (Cb-V) ntxiv dag zog rau steel teev hauv qab ASTM A572 / A572M. Nws yog feem ntau "50 ksi yield" steel phaj nyob rau hauv North America, muab 50% siab zog dua A36 nrog tsuas yog tus nqi qis tus nqi, ua rau nws muaj txiaj ntsig zoo rau qhov hnyav - txuag tsim.
Quick- Daim Ntawv Qhia Cov Ntaub Ntawv
| Qeb | Specification |
|---|---|
| Txuj | ASTM A572 / A572M (ASME SA-572 zoo tib yam) |
| Hom | Siab-Lub zog qis-Alloy (HSLA) |
| Yield zog (ReH) | Ntau dua lossis sib npaug rau 345 MPa (Ntau dua lossis sib npaug rau 50 ksi) |
| Tensile zog (Rm) | Ntau dua lossis sib npaug rau 450 MPa (Ntau dua lossis sib npaug rau 65 ksi) |
| Ntsiab Feature | Ua kom muaj zog los ntawm microalloying (Columbium/Vanadium) thaum kub - dov. |
| Cov Hom Phiaj | Phaj, Sheets, Bars, thiab Structures Shapes (angles, channels, wide{0}}flange beams). |
1. Tshuaj muaj pes tsawg leeg ntawm SA572 Qib 50 (Qhov hnyav %)
Lean chemistry tsom rau kev ntxiv dag zog los ntawm kev ua kom zoo thiab nag lossis daus.
| Element | Maximum % (Tswj rau Qib 50) | Lub luag haujlwm / cuam tshuam |
|---|---|---|
| Cov pa roj carbon (C) | 0.23%max | Muab lub hauv paus zog. Khaws nruab nrab rau weldability. |
| Manganese (Mn) | 1.35%max | Ua kom muaj zog thiab hardenability. |
| Phosphorus (P) | 0.04%max | Impurity (kom qis). |
| Sulfur (S) | 0.05%max | Impurity (kom qis). |
| Silicon (Si) | 0.40%max | Deoxidizer, ntxiv dag zog rau ferrite. |
| Columbium (Cb / Nb) | 0.005 - 0.05% | KEY Microalloy. Refines grain loj thaum dov, ua kom muaj zog thiab toughness. |
| Vanadium (V) | 0.01 - 0.15% | KEY Microalloy. Forms fine precipitates (V(C,N)) rau nag lossis daus hardening. |
| Nitrogen (N) | 0.015%max (yog tias siv V) | Tswj kom zoo dua VN nag lossis daus. |
Cov Lus Cim Tseem Ceeb Metallurgical: Kev sib xyaw ua ke ntawm Cb (Nb) thiab V tso cai rau cov hlau kom ua tiav lub zog siab ncaj qha los ntawm kub- dov zeb, feem ntau tsis tas yuav tsum tau cais cov quenching & tempering kub kho. Qhov no yog qhov sib txawv tseem ceeb ntawm A514.
2. Mechanical Properties ntawm SA572 Qib 50
Cov cuab yeej ua tiav los ntawm kev tswj dov, tsis yog kev kho cua sov.
| Khoom | Yuav tsum tau (rau thickness Tsawg dua los yog sib npaug rau 4 hauv / 100 mm) | Nco tseg |
|---|---|---|
| Yield zog | Ntau dua lossis sib npaug rau 345 MPa (50 ksi) | Kev tsim qauv tseem ceeb tshaj A36. |
| Tensile zog | Ntau dua lossis sib npaug rau 450 MPa (65 ksi) | |
| Elongation (hauv 2 ") | Ntau dua lossis sib npaug li 21% | Zoo ductility. |
| Charpy V-Qhov cuam tshuam | Feem ntau TSIS xav tau los ntawm lub neej ntawd. Muaj peev xwm teev tau raws li Kev Xav Tau Ntxiv (S5) ntawm ntau qhov kub thiab txias. | Qhov sib txawv loj ntawm A514. Toughness feem ntau txaus tab sis tsis muaj ntawv pov thawj tshwj tsis yog tias xaj. |
Thickness Availability: Yooj yim muaj nyob rau hauv ntau yam, feem ntau ntawm cov ntawv nyias (16 ga) mus txog 8 nti (200 mm) phaj rau qee cov neeg tsim khoom. Cov khoom yog tuab- nyob ntawm.
3. Qhov tseem ceeb & Cov yam ntxwv ntawm SA572 Qib 50
Lub zog siab dua, Qhov hnyav dua: 50 ksi yield tso cai rau me me, sib zog seem piv rau A36, txo cov khoom tonnage thiab nqi hauv ntau qhov qauv.
Weldability Zoo: Cov ntsiab lus carbon nruab nrab thiab Carbon sib npaug (CEV feem ntau ~ 0.40-0.45) ua rau nws weldable nrog cov qauv qis- hydrogen xyaum. Pre-heat tej zaum yuav xav tau rau cov seem tuab.
Tus nqi-Qhov muaj zog zoo: Muab lub zog loj dua A36 ntawm tus nqi me me, muab tus nqi zoo heev.
Zoo Atmospheric Corrosion Resistance: ~ 2x zoo dua cov pa roj carbon steel (txawm tias tsawg dua cov huab cua zoo li A588). Qhov no yog nyob rau hauv HSLA steels.
Formability & Toughness: Zoo txias - tsim cov yam ntxwv dua li quenched & tempered steels zoo sib xws.
4. Cov ntawv thov tseem ceeb ntawm SA572 Qib 50
SA572 Gr. 50 yog qhov mus- xaiv thaum A36 tsis muaj zog heev thiab A514 yog overkill.
Kev tsim vaj tsev: kab, trusses, thiab kab teeb uas txo cov tswv cuab loj yog qhov zoo.
Choj Ua Haujlwm: Girders, diaphragms, thiab cov khoom siv (feem ntau teev raws li A709 Qib 50 rau txuas hniav).
Heavy Equipment & Machinery: Tsheb thav duab, crane booms (rau cov qauv sib dua), trailer txaj, khoom siv ua liaj ua teb.
Cia Tank & Cov Nkoj Siab (thaum teev tseg).
Tsheb thauj mus los: Railcar Cheebtsam, barges.
General Fabrication: Txhua tus qauv welded xav tau kev txhawb nqa lub zog yam tsis muaj qhov nyuaj ntawm Q&T steel.
5. Fabrication Considerations ntawm SA572 Qib 50
| Txheej txheem | Cov ntsiab lus tseem ceeb |
|---|---|
| Vuam | Siv cov txheej txheem hydrogen tsawg (SMAW, FCAW, thiab lwm yam). Pre-heat: Recommended for thicker material (>1 in.) thiab cov pob qij txha nruj heev. Ua raws li cov lus qhia AWS D1.1. Filler Hlau: Feem ntau siv E70XX series electrodes rau lub zog sib xws. |
| Txiav | Txhua txoj kev txiav thermal (plasma, oxy- roj, laser) ua haujlwm zoo. |
| tsim | Txias zoo heev - muaj peev xwm tsim tau piv rau Q&T steels. Nws tuaj yeem khoov thiab xuas nrig ntaus zoo. |
| Tshuab dhos | Cov tshuab zoo ib yam li lwm yam qis- alloy steels; me ntsis tawv dua A36. |
6. Nws txawv npaum li cas ntawm cov qhab nia sib piv tseem ceeb
| Qib Steel | Qhov txawv tseem ceeb ntawm SA572 Gr. 50 |
|---|---|
| ASTM A36 | 50 ksi vs . 36 ksi yield. A572 Gr.50 muaj zog dua, kim dua me ntsis, thiab muaj kev tiv thaiv corrosion zoo dua. |
| ASTM A514 Gr. F | 50 ksi vs . 100 ksi yield. A514 yog Q&T alloy steel, muaj zog dua, kim dua, nyuaj rau vuam / daim ntawv, thiab yuav tsum muaj zog. A572 yog HSLA raws li - dov. |
| ASTM A588 Cov Lus Qhia Tshwj Xeeb | Zoo ib yam li 50 ksi tawm los, tab sis A588 yog cov hlau huab cua (~ 4-6x zoo dua corrosion kuj) rau cov khoom raug, tsis pleev xim. Chemistry txawv (Cu, Ni, Cr). |
| ASTM A709 Gr 1. | Cov khoom siv tib yam, tab sis A709 yog tus choj version nrog qhov yuav tsum tau ua kom nruj thiab kev pom zoo rau txoj kev loj choj. |
7. Qib sib npaug ntawm SA572 Qib 50
| Region/Standard | Qhov sib npaug ze tshaj plaws | Sau ntawv |
|---|---|---|
| Teb chaws Europe (EN) | S355JR / J2 / J0 (EN 10025-2) | Ze tshaj plaws hauv daim ntawv thov . 355 MPa tawm los (51 ksi) yog ze li qub. A572 Gr.50 muaj zog me ntsis. |
| Thoob ntiaj teb | ASTM A529 Cov Khoom Siv Hluav Taws Xob | Zoo sib xws 50 ksi tawm los, tab sis chemistry txwv txawv (tsis muaj Cb / V yuav tsum tau). Tsawg dua. |
| Suav (GB) | Q355B / Q345B | 345 MPa tawm los (50 ksi). Feem ntau HSLA cov qauv hlau nyob hauv Suav teb. |
| Japanese (JIS) | SWB 490YA | Zoo sib xws lub zog thiab kev siv. |
Cov Lus Qhia
Thaum ordering, qhia:
Daim Ntawv Qhia Tag Nrho: ASTM A572 Qib 50
Qhov xwm txheej: Feem ntau muab raws li kub- dov.
Cov Kev Xav Tau Ntxiv: Yog xav tau kev ntsuam xyuas qhov cuam tshuam (xws li, rau kev pabcuam txias), koj yuav tsum qhia meej meej txog Kev Xav Tau S5 thiab ntsuas qhov ntsuas kub (xws li "Charpy V-Notch, 40 ft-lb ntawm 0℃F").
Cov ntsiab lus
SA572 Qib 50 yog qhov zoo tshaj plaws, tus nqi- cov khoom siv tau zoo rau cov kws ua haujlwm nrhiav kom txo qhov hnyav thiab qhov loj me hauv cov qauv tsim yam tsis muaj venturing rau hauv siab - nqi, siab -fabrication- complexity realm ntawm quenched & tempered steels. Nws sawv cev rau qhov chaw qab zib nyob rau hauv cov qauv steel lub zog spectrum rau ib tug loj array ntawm daim ntaub ntawv, bridging qhov sib txawv ntawm me ntsis steel thiab ultra-siab-lub zog alloy steel. Nws raws li - dov HSLA xwm ua rau nws paub thiab kuj yooj yim rau kev ua hauj lwm nrog rau cov khw siv rau A36.
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.
