Q235 vs Q345 Hlau: Khoom, Kev Siv & Yuav Xaiv Li Cas
Q235 thiab Q345 yog ob ntawm cov qib carbon steel feem ntau siv nyob rau hauv Tuam Tshoj txoj kev lag luam steel. Lawv tau siv dav hauv kev tsim kho, kev tsim khoom, kev tsim vaj tsev, thiab kev xa tawm steel. Kev nkag siab txog qhov sib txawv ntawm ob qib no yog qhov tseem ceeb rau cov kws tsim khoom, cov kws tshaj lij kev muag khoom, thiab cov thawj tswj xyuas qhov project uas yuav tsum xaiv cov khoom siv zoo rau lawv daim ntawv thov.
Q235 thiab Q345 Steel yog dab tsi?
Nyob rau hauv Suav steel tsim system (GB / T 700 thiab GB / T 1591), "Q" sawv cev rau lub zog tawm los, thiab tus lej qhia qhov tsawg kawg nkaus tawm lub zog hauv megapascals (MPa). Yog li ntawd:
Q235- Yam tsawg kawg nkaus tawm lub zog ntawm 235 MPa
Q345- Yam tsawg kawg nkaus tawm lub zog ntawm 345 MPa
Ob qib yog tsawg- carbon structural steels, tab sis lawv txawv heev nyob rau hauv tshuaj muaj pes tsawg leeg, txhua yam khoom, thiab kev siv.
Kev sib piv tshuaj lom neeg
| Element | Q235 (%) | Q345 (%) |
|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.22 | Tsawg dua los yog sib npaug li 0.20 |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.35 | Tsawg dua los yog sib npaug li 0.55 |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.40 | 1.00-1.60 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.045 | Tsawg dua lossis sib npaug li 0.040 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.045 | Tsawg dua lossis sib npaug li 0.040 |
| Vanadium (V) | - | 0.02-0.15 |
| Niobium (Nb) | - | 0.015-0.060 |
| Titanium (Ti) | - | 0.02-0.20 |
Qhov txawv tseem ceeb:Q345 muaj cov manganese ntau dua thiab tuaj yeem suav nrog micro- alloying cov ntsiab lus (V, Nb, Ti) uas ua rau nws lub zog nce ntxiv. Q235 yog ib qho yooj yim carbon steel nrog tsawg alloying ntsiab.
Mechanical Properties Sib piv
| Khoom | Q235 | Q345 |
|---|---|---|
| Yield zog (MPa) | Ntau dua lossis sib npaug rau 235 | Ntau dua lossis sib npaug rau 345 |
| Tensile zog (MPa) | 375-500 | 470-630 |
| Elongation (%) | Ntau dua lossis sib npaug li 26 | Ntau dua lossis sib npaug 22 |
| Impact Zog (J, 20 degree) | Ntau dua lossis sib npaug 27 | Ntau dua lossis sib npaug li 34 |
| Hardness (HB) | 120-180 | 140-200 |
Raws li cov ntaub ntawv qhia, Q345 muaj kwv yees li47% siab dua yield zogtshaj Q235, ua rau nws muaj zog heev. Txawm li cas los xij, Q235 muaj qhov zoo dua me ntsis ductility (elongation), uas txhais tau tias nws yooj yim dua rau daim ntawv thiab khoov.
Sib npaug International Qib
Thaum nrhiav cov hlau rau cov haujlwm thoob ntiaj teb, nws yog ib qho tseem ceeb kom paub cov qib sib npaug hauv cov qauv sib txawv hauv lub tebchaws:
| Suav (GB) | USA (ASTM) | Teb chaws Europe (EN) | Nyiv (JIS) | Lub teb chaws Yelemees (DIN) |
|---|---|---|---|---|
| Q235 | A36, A283 | S235 JR | SIB 400 | Qhov 37-2 |
| Q345 | A572 Gr.50 | S355 JR | SIB 490 | St52-3 |
Daim Ntawv Thov: Thaum Siv Q235 vs Q345
Q235 Cov ntawv thov
Vim nws lub zog nruab nrab, weldability zoo heev, thiab tus nqi qis, Q235 yog qhov mus- rau qib rau kev siv dav dav - lub hom phiaj:
Kev tsim kho thiab kev tsim vaj tsev dav dav
Ordinary carbon steel kav
Steel seem (lub kaum sab xis steel, channel steel, I-beams)
Machinery qhov chaw uas tsis tshua muaj kev nyuaj siab loads
Automotive thav duab thiab chassis Cheebtsam
Sheet hlau fabrication thiab stamping
Q345 Daim ntawv thov
Nrog nws lub zog siab dua - rau - qhov hnyav piv, Q345 yog qhov nyiam rau kev thauj khoom- cov kabmob thiab siab - kev siv kev ntxhov siab:
High-nce tsev thav duab
Kev tsim kho choj thiab kev tsim kho vaj tse
Hnyav- cov pa roj carbon steel phaj rau cov hlab ntsha siab
Crane booms thiab lifting khoom
Shipbuilding thiab marine structures
Cua turbine yees thiab kev txhawb nqa
Mining thiab tshuab hnyav
Tus nqi sib piv
Q345 feem ntau raug nqi5-15% ntau duatshaj Q235 vim nws cov ntsiab lus ntau dua manganese thiab ntxiv alloying ntsiab. Txawm li cas los xij, vim tias Q345 muaj zog dua, koj tuaj yeem siv cov ntu nyias nyias kom ua tiav tib lub peev xwm, uas tuaj yeem cuam tshuam tus nqi siab dua ib - tuj. Hauv ntau daim ntawv thov kev tsim qauv, siv Q345 es tsis txhob Q235 tuaj yeem txo qhov hnyav tag nrho ntawm 20-30%, uas ua rau tag nrho cov nqi txuag.
Yuav Ua Li Cas Xaiv Ntawm Q235 thiab Q345
| Xaiv Q235 thaum ... | Xaiv Q345 thaum ... |
|---|---|
| Loads yog nruab nrab thiab kwv yees | Cov txheej txheem siab loads tam sim no |
| Tus nqi yog qhov kev txhawj xeeb tseem ceeb | Lub zog-rau- qhov hnyav piv yog qhov tseem ceeb |
| Yuav tsum tau welding los yog tsim | Thinner, sib dua seem yog xav tau |
| Qhov project ua raws li ASTM A36 lossis EN S235 specs | Qhov project ua raws li ASTM A572 lossis EN S355 specs |
| Cov qauv tsis yog - tseem ceeb ( laj kab, rooj vag, txee) | Cov qauv yog qhov tseem ceeb (choj, yees, cov hlab ntsha siab) |
Cov lus nug nquag
Q: Puas yog Q345 zoo dua Q235?
A:Tsis tas yuav "zoo dua" - Q345 muaj zog dua, tab sis Q235 yuav tsim nyog dua rau cov ntawv thov uas tsis xav tau lub zog siab. Q235 yooj yim dua rau vuam, daim ntawv, thiab tus nqi ntau dua - siv tau rau kev siv dav dav -. Qhov kev xaiv yog nyob ntawm koj qhov tshwj xeeb engineering xav tau.
Q: Q235 thiab Q345 puas tuaj yeem txuas ua ke?
A:Yog lawm, Q235 thiab Q345 tuaj yeem welded ua ke siv cov txheej txheem vuam txheej txheem. Txawm li cas los xij, qhov sib koom ua ke lub zog yuav raug txwv los ntawm cov khoom tsis muaj zog (Q235). Siv cov khoom siv vuam tsim nyog (xws li E4303 lossis E5015 electrodes) thiab ua raws li cov txheej txheem vuam tsim nyog.
Q: Dab tsi yog qhov sib npaug ntawm Q345 hauv ASTM cov qauv?
A: Q345 yog kwv yees li ASTM A572 Qib 50 hauv Asmeskas tus qauv. Ob leeg muaj qhov tsawg kawg nkaus lub zog ntawm kwv yees li 345 MPa (50 ksi). Rau cov haujlwm European, qhov sib npaug yog EN 10025 S355JR.
Xaus
Ob qho Q235 thiab Q345 yog cov qauv hlau zoo heev, txhua tus muaj nws tus kheej lub zog. Q235 muab tus nqi- ua haujlwm tau zoo thiab ua haujlwm tau zoo rau cov ntawv thov dav dav, thaum Q345 muab lub zog zoo dua rau kev xav tau cov haujlwm ua haujlwm. Los ntawm kev nkag siab txog qhov sib txawv ntawm qhov sib xyaw, cov khoom siv kho tshuab, thiab kev siv, koj tuaj yeem xaiv cov khoom siv zoo rau koj qhov project.
Ntawm Tianjin Kun Yu Technology, peb muab ob qho tib si Q235 thiab Q345 steel khoom - suav nrog cov kav hlau, steel phaj, steel coils, thiab cov qauv ntu - rau cov neeg siv khoom thoob ntiaj teb. Tiv tauj peb rau cov lus hais dawb raws li koj qhov project specifications.
Xav tau Q235 lossis Q345 Steel Khoom?
Tau txais ib qho kev tsocai pub dawb los ntawm ISO9001 cov chaw tsim khoom muaj ntawv pov thawj . 10+ xyoo ntawm kev xa tawm steel.
Tau txais Daim Ntawv Tso Cai Dawb
