Cov lus teb ncaj qha thiab feem ntau lees txais rau "dab tsi yogq 355 uasib npaug rau ASTM" yogASTM A572 Qib 50. Q355B, feem ntau tau teev cov qib zoo raws li tus qauv Suav tam sim no GB / T 1591-2018, sib haum rau ASTM A572 Qib 50 hauv American ASTM cov qauv.
Ntau lub thoob ntiaj teb steel databases thiab ntoo khaub lig-cov ntaub ntawv siv txuas ntxiv kom paub meej qhov sib npaug. Tuam Tshoj steel qauv GB/T 1591-2018 tau hloov kho los hloov cov laus Q345 lub npe nrog Q355, tsim kom muaj qhov tsawg kawg nkaus yield zog ntawm 345 MPa mus rau 355 MPa - tus nqi uas zoo sib xws nrog ASTM A572 Qib 50 qhov tsawg kawg nkaus yield zog ntawm 50si MPa (345k MPa). Hauv kev tsim qauv tsim qauv, feem ntau Q355B steel daim hlau ua tiav qhov txiaj ntsig ntawm lub zog muaj zog uas ua tau raws li lossis tshaj ASTM A572 Qib 50 qhov pib nrog cov npoo zoo.
Qhov sib npaug no tau lees paub dav dav hauv kev coj ua engineering thoob ntiaj teb. Thaum Q355B piv nrog A572 Qib 50, ob qib poob hauv 345-355 MPa lub zog ntau yam, uas yog vim li cas lawv feem ntau suav hais tias hloov pauv hauv cov qauv siv, tshwj xeeb tshaj yog tom qab Tuam Tshoj hloov kho nws cov qauv steel hauv 2018.
Chemical Composition Comparison - Q355 vs. ASTM A572 Qib 50
Nkag siab txog cov tshuaj sib txawv ntawm Q355 thiabASTM A572 Qib 50Nws yog ib qho tseem ceeb rau cov txheej txheem vuam kev tsim nyog thiab cov ntaub ntawv pov thawj. Cov lus hauv qab no nthuav qhia qhov sib piv ncaj qha ntawm cov ntsuas kub ntsuas ntsuas.
| Element | Q355B (GB/T 1591-2018, Tsawg dua lossis sib npaug li 16 hli) | ASTM A572 Qib 50 |
|---|---|---|
| Cov pa roj carbon (C), % max | 0.24 | 0.23 |
| Silicon (Si), max% | 0.55 | 0.40 |
| Manganese (Mn), max % | 1.60 | 1.35 |
| Phosphorus (P), max% | 0.035 | 0.040 |
| Sulfur (S), max % | 0.035 | 0.050 |
Mechanical Properties Comparison - Yield thiab Tensile Strength
Mechanical zog ntawm Q355 thiabASTM A572 Qib 50yog sib piv, ua kev hloov ncaj nraim rau feem ntau cov qauv siv.
| Khoom | Q355B (tsawg dua lossis sib npaug li 16 hli) | ASTM A572 Qib 50 (tsawg dua lossis sib npaug li 40 hli) |
|---|---|---|
| Yield zog, min (MPa) | 355 | 345 |
| Tensile zog (MPa) | 470–630 | 450 min |
| Elongation, min (%) | 22 (hauv 50mm) | 21 (hauv 50mm) |
| Impact Test Temperature (Standard) | +20℃(Qib B) | Raws li kev xav tau ntxiv |
Q355B lav qhov tsawg kawg nkaus lub zog ntawm 355 MPa rau daim hlau txog 16 hli, uas yog10 MPa siab duatshaj 345 MPa yam tsawg kawg nkaus ntawm A572 Qib 50. Tensile lub zog ntau yam zoo sib xws, nrog Q355B xws li 470 txog 630 MPa thiab A572 Qib 50 pib los ntawm qhov tsawg kawg nkaus ntawm 450 MPa. Elongation qhov tseem ceeb - ib qho kev ntsuas ntawm ductility ua ntej tawg - yog xyaum zoo tib yam, kom ntseeg tau tias ob qib muaj peev xwm sib piv deformation nyob rau hauv huab loading.
Rau cov phaj tuab, ob qho tib si Q355 thiab ASTM A572 Qib 50 nthuav tawm thickness - nyob ntawm qhov txo qis. Ib qho kev sib piv ntawm 2025 tau lees paub tias ob qho tib si cov qauv siv cov yam ntxwv zoo sib xws, nrog rau kev tawm dag zog lub zog poob qis thaum phaj thickness nce los ntawm 16 hli mus txog 100 hli thiab tshaj.
Q355 Cov Qib Zoo thiab lawv cov ASTM sib npaug - B, C, D, thiab E
Q355B Sib npaug rau ASTM A572 Qib 50 - Qhov Kev Sib Tw Feem Ntau
Q355Byog cov khoom siv dav tshaj plaws thiab cov khoom lag luam zoo hauv qib GB / T 1591-2018, thiab nws qhov sib npaug ASTM yog qhov tseebASTM A572 Qib 50. Q355B yuav tsum tau Charpy V- qhov ntsuas qhov cuam tshuam ntawm +20℃nrog qhov tsawg kawg nkaus absorbed zog ntawm 34 J. ASTM A572 Qib 50 tsis yuam Charpy qhov kev ntsuam xyuas nyob rau hauv nws lub hauv paus specification, tab sis kev ntsuam xyuas ntxiv muaj peev xwm teev tau - feem ntau txuam Q355B's +20℃cov ntaub ntawv xav tau.
Q355B cov tshuaj muaj pes tsawg leeg - carbon siab tshaj 0.24%, manganese mus txog 1.60%, phosphorus thiab sulfur txhua ntawm 0.035% siab tshaj - ze rau iav A572 Qib 50, tsuas yog me me sib txawv ntawm manganese ntau thiab microalloying ntsiab. Rau kev siv cov qauv siv dav dav suav nrog lub tsev thav duab, choj girders, cov khoom siv tshuab, thiab cov tso tsheb hlau luam, Q355B thiab A572 Qib 50 tuaj yeem hloov pauv tau.
Q355C, Q355D, thiab Q355E - ASTM Equivalents nrog Enhanced Toughness
Raws li qhov xav tau kev pabcuam kub txo qis, Q355 cov qhab nia zoo ua rau muaj kev tswj hwm tshuaj nruj dua thiab xav tau ntau dua qhov yuav tsum tau ua. Cov lus hauv qab no qhia txhua Q355 qib zoo rau nws qhov sib npaug ASTM ze tshaj plaws.
| Q355 qib | Impact Test Temperature | Yam tsawg kawg nkaus zog | Qhov ze tshaj ASTM sib npaug | Sau ntawv |
|---|---|---|---|---|
| Q355B | +20 degree | Ntau dua lossis sib npaug li 34 J | A572 Qib 50 | Kev siv cov qauv siv dav dav; tsis muaj kev cuam tshuam kev xeem hauv paus ASTM spec |
| Q355C | 0 degree | Ntau dua lossis sib npaug li 34 J | A572 Qib 50 + CVN ntawm 0 degree | Yuav tsum muaj kev ntsuam xyuas ntxiv rau ntawm ASTM sab |
| Q355D | -20 degree | Ntau dua lossis sib npaug li 34 J | A572 Qib 50 + CVN ntawm -20 degree | Stricter P (tsawg dua lossis sib npaug rau 0.025%) thiab S (tsawg dua lossis sib npaug rau 0.025%) txwv tshaj A572 |
| Q355E | -40 degree | Ntau dua lossis sib npaug li 27 J | A572 Qib 50 feem ntau yogtsis sib npaug | Yuav tsum tau EN S355NL lossis ASTM A709 Qib 50 nrog CVN ntawm -40 degree |
- Rau Q355D, uas tau sim ntawm -20 degree, engineers yuav tsum tau qhia A572 Qib 50 nrog ntxiv Charpy V-notch cuam tshuam kev kuaj ntawm tib qhov kub, nrog rau nruj phosphorus thiab sulfur txwv kom phim cov tshuaj tswj hwm nruj dua hauv Suav tus qauv.
- Rau Q355E (kuaj ntawm -40 degree), qhov sib npaug ASTM ua tsawg ncaj qha. ASTM A572 Qib 50 tsis yog feem ntau muab nrog -40℃cuam tshuam lav. Hauv cov xwm txheej no, European EN 10025-3S355 NLlos yog ASTM A709 Qib 50 nrog ntxiv qis - ntsuas qhov kub thiab txias yog qhov tsim nyog dua - siv.
Q355 vs ASTM A36
Rau cov haujlwm uas tsuas yog xav tau lub zog nruab nrab, qee tus neeg yuav khoom nug seb ASTM A36 tuaj yeem hloov pauv rau Q355. Cov lus teb yogtsis muaj- ASTM A36 lav qhov tsawg kawg nkaus lub zog ntawm tsuas yog 250 MPa (36 ksi), uas yog qis dua Q355's 355 MPa. Siv A36 qhov twg Q355 tau teev tseg yuav ua rau lub zog tsis txaus ntawm kwv yees li 30%, muaj feem cuam tshuam txog kev nyab xeeb ntawm cov qauv. A36 yog qhov tsim nyog dua piv rau Suav tus qauv Q235B. Rau txhua qhov project xav tau Q355-theem lub zog, ASTM A572 Qib 50 tseem yog qhov tsawg kawg nkaus tau txais ASTM sib npaug.
Q355 vs ASTM A709 Qib 50
ASTM A709 yog cov qauv kev qhia tshwj xeeb rau cov qauv hlau siv hauv cov txuas hniav, thiabA709 qib 50qhia tib lub zog uas yuav tsum tau ua raws li A572 Qib 50 - qhov tsawg kawg nkaus lub zog ntawm 345 MPa (50 ksi). Rau cov ntawv thov choj, Q355 tuaj yeem hla- xa mus rau A709 Qib 50, tshwj xeeb tshaj yog thaum ntsuas kev cuam tshuam ntxiv ntawm qhov ntsuas kub yuav tsum tau ua los ntawm qhov project specification. Qhov txiaj ntsig tseem ceeb ntawm A709 yog nws qhov tseeb suav nrog cov kev cai nruj rau kev puas tsuaj - cov tswv cuab tseem ceeb ntawm cov choj, ua rau nws muaj kev xaiv ntau dua li A572 Qib 50 rau cov txheej txheem tseem ceeb.
Q355 vs ASTM A529 Qib 50
ASTM A529 Qib 50 yog cov pa roj carbon -manganese steel nrog qhov tsawg kawg nkaus tawm lub zog ntawm 345 MPa, zoo ib yam li A572 Qib 50. Txawm li cas los xij, A529 ua tiav nws lub zog feem ntau los ntawm cov ntsiab lus carbon thiab manganese ntau dua li microalloying. Thaum Q355 tuaj yeem hla- hais txog A529 Qib 50 rau cov tuab txog li 1 nti (25.4 hli), qhov sib npaug ntawm cov pa roj carbon ntau dua ntawm A529 feem ntau ua rau qis dua weldability. Rau welded structural applications, A572 Qib 50 tseem yog qhov nyiam ASTM match rau Q355.
Npaj rau qhov chaw Q355 steel lossis ASTM sib npaug nrog cov ntaub ntawv ua tiav? Xa koj cov lus qhia tshwj xeeb rau peb hnub no - qib, thickness, ntau, thiab cov kev xav tau ntawm kev ntsuas cuam tshuam - thiab tau txais cov lus hais dawb hauv 24 teev. Hu rau GNEE Steel tam sim no thiab cia peb pab koj tsim kom muaj zog dua, muaj kev nyab xeeb dua, thiab tus nqi ntau dua -cov qauv siv tau zoo.
Nyem kom tau txais cov qauv dawb
FAQ
Q1: Q355 steel sib npaug rau ASTM yog dab tsi?
Thawj ASTM sib npaug ntawm Q355 steel yogASTM A572 Qib 50. Q355B, feem ntau siv cov qib zoo, sib raug ncaj qha rau A572 Qib 50. Ob qib sib piv cov txiaj ntsig zoo (345-355 MPa), lub zog tensile, tshuaj muaj pes tsawg leeg, thiab weldability.
Q2: Puas yog Q355 zoo ib yam li A36?
Tsis yog Q355 muaj qhov tsawg kawg nkaus tawm lub zog ntawm 355 MPa, thaum ASTM A36 lav tsuas yog 250 MPa (36 ksi). A36 yog sib npaug rau Suav Q235B, tsis yog Q355. Hloov A36 rau Q355 yuav ua rau muaj qhov tsis muaj zog txaus.
Q3: Q355D sib npaug li cas hauv ASTM?
Q355D (kev cuam tshuam kuaj ntawm -20 degree) sib haum rau ASTM A572 Qib 50 nrog ntxiv Charpy V-notch cuam tshuam kev kuaj ntawm -20℃. Cov kev txwv phosphorus thiab sulfur nruj dua hauv Q355D kuj tseem yuav tsum tau txheeb xyuas cov ntaub ntawv pov thawj A572.
Q4: Q355E sib npaug li cas hauv ASTM?
Q355E (kev cuam tshuam kuaj ntawm -40 degree) tsis muaj qhov sib npaug ASTM ncaj qha. Qhov sib tw ze tshaj plaws yog ASTM A709 Qib 50 nrog -40℃cuam tshuam kev sim, lossis European EN 10025-3 S355NL.
Q5: Puas yog GNEE Steel muab ntawv pov thawj rau GB / T 1591 Q355 thiab ASTM A572 Qib 50?
Yog lawm. Peb muab daim phiaj nrog daim ntawv pov thawj dual lossis nrog daim ntawv pov thawj tshwj xeeb uas xav tau rau koj qhov project, suav nrog EN 10204 3.1 lossis 3.2 MTC.
Q6: Tus qauv Indian sib npaug ntawm Q355 yog dab tsi?
IS 2062 E350 yog qhov ze tshaj plaws Indian tus qauv sib npaug rau Q355B, feem ntau siv hauv cov qauv siv hauv Is Nrias teb, thiab IS 8500 FE 570 ua lwm yam sib npaug.
Q7: Qhov txawv ntawm Q355 thiab Q345 yog dab tsi?
Q355 hloov Q345 nyob rau hauv GB / T 1591-2018. Qhov tsawg kawg nkaus tawm lub zog tau raug tsa los ntawm 345 MPa mus rau 355 MPa, xav txog qhov tseeb ntawm lub zog tsim khoom ntawm Suav cov qauv hlau. Feem ntau Q345 cov ntaub ntawv twb tau ntsib Q355 qhov pib hauv kev xyaum.
