Hlau yog hlau - carbon alloy dav siv hauv kev tsim kho thiab tsim khoom. Q235 thiab Q355 yog ob ntawm cov qib steel nrov tshaj plaws nyob rau hauv Suav teb, feem ntau siv rau cov qauv H beams hauv cov tsev, txuas hniav, thiab cov haujlwm ua lag luam.
Qhov sib txawv tseem ceeb ntawm lawv yog cov ntsiab lus carbon, lub zog tawm los, thiab kev ua haujlwm ntawm cov tshuab, uas txiav txim siab cov ntawv thov tsim nyog rau txhua tus.
1. Cov cuab yeej yooj yim
Q235 H kab:
Tsawg- carbon steel (C Tsawg dua lossis sib npaug li 0.28%)
Zoo plasticity thiab toughness
Weldability zoo heev thiab ua haujlwm txias
Nruab nrab corrosion kuj thiab hnav tsis kam
Tawm zog: 235 MPa
Tensile zog: 370-500 MPa
Elongation: 20-26%
Q355 H Beams:
Tsawg- alloy, siab dua- lub zog steel (C Tsawg dua lossis sib npaug li 0.30%)
Siab zog nrog zoo plasticity thiab toughness
Zoo weldability thiab txias khoov khoom
Nruab nrab corrosion kuj
Tawm zog: 355 MPa
Tensile zog: 470-630 MPa
Elongation: 18-22%
2. Kev sib piv tshuaj lom neeg
| Qib Steel | C (%) | Si (%) | Mn (%) | P (%) | S (%) |
|---|---|---|---|---|---|
| Q235 | Tsawg dua lossis sib npaug li 0.28 | Tsawg dua los yog sib npaug rau 1.0 | Tsawg dua lossis sib npaug li 1.65 | Tsawg dua lossis sib npaug li 0.045 | Tsawg dua lossis sib npaug li 0.045 |
| Q355 | Tsawg dua los yog sib npaug li 0.30 | Tsawg dua los yog sib npaug rau 1.0 | Tsawg dua lossis sib npaug li 1.65 | Tsawg dua lossis sib npaug li 0.045 | Tsawg dua lossis sib npaug li 0.045 |
Q235 muaj cov pa roj carbon tsawg me ntsis thiab cov khoom siv alloying, ua rau cov khoom zoo dua qub thiab kev sib txuas.
Q355 muaj cov pa roj carbon ntau dua me ntsis thiab lub zog, haum rau hnyav- daim ntawv thov.
3. Mechanical Properties Comparison
| Khoom | Q235 H Beam | Q355 H Beam |
|---|---|---|
| Yield zog | 235 MPa rau | 355 MPa rau |
| Tensile zog | 370-500 MPa | 470-630 MPa |
| Elongation | 20–26% | 18–22% |
Q235 H beams yog qhov zoo tagnrho rau cov qauv kev tsim kho nrog cov khoom nruab nrab.
Q355 H kab teeb yog tsim rau siab - cov qauv kev ntxhov siab xws li lub hauv paus tsev, txuas hniav, lossis cov qauv kev lag luam.
4. Cov ntawv thov
Q235 H kab:
Cov vaj tse nyob thiab kev ua lag luam thav ntawv
Cov choj nrog cov kev xav tau nruab nrab
General structural engineering thiab fabrication
Q355 H Beams:
Heavy-load cov tsev lag luam
Cov choj thiab cov yam ntxwv tseem ceeb
Machinery thiab structural qhov chaw yuav tsum tau muaj zog thiab kev nyab xeeb
5. Tus nqi thiab kev xaiv
Q235 H kab teeb yog tus nqi ntau dua - siv tau thiab siv dav rau kev tsim kho.
Q355 H kab teeb yog me ntsis kim dua, tsim nyog los ntawm lub zog siab dua thiab kev ua tau zoo.
Tus nqi sib txawv yog feem ntau nominal (feem ntau tsawg dua $ 100 ib tuj), ua Q235 qhov kev xaiv zoo tshaj plaws rau feem ntau cov haujlwm uas lub zog siab tsis tseem ceeb.
Ob Q235 thiab Q355 H kab teeb yog qhov tseem ceeb rau kev tsim kho niaj hnub. Q235 H kab teeb yog qhov nrov tshaj plaws vim lawv qhov sib npaug ntawm lub zog, ductility, thiab tus nqi -kev ua tau zoo. Q355 H kab teeb muab lub zog ntxiv rau cov ntawv thov, muab cov neeg ua haujlwm yooj yim kom ua tau raws li kev nyab xeeb thiab kev tsim qauv.
