I. Cov yam ntxwv tseem ceeb thiab kev ua tau zoo ntawm S275JR S275JR square thiab cov kab plaub hau tsis yog -alloy structural steel leeg tau teev tseg nyob rau hauv European tus qauv EN 10025-2, belongs rau "J" series (qhia txog kev cuam tshuam tsis zoo saum 27 Joules).
Tej yam khoom muaj xws li:
1. Tensile zog: 410-560 MPa (tus nqi tus qauv), yield zog ntau dua los yog sib npaug rau 275 MPa.
2. Elongation: Ntau dua lossis sib npaug li 23% (thickness Tsawg dua lossis sib npaug ntawm 16mm), nthuav tawm cov yas zoo.
3. Tshuaj lom neeg muaj pes tsawg leeg: Cov ntsiab lus carbon tsawg (C Tsawg dua lossis sib npaug li 0.21%), tsis tshua muaj sulfur thiab phosphorus (S Tsawg dua lossis sib npaug li 0.035%, P Tsawg dua lossis sib npaug li 0.035%), haum rau vuam thiab ua haujlwm txias.
4. Daim ntawv thov scenarios: dav siv nyob rau hauv uas tsis yog - ib puag ncig heev xws li lub tsev thav duab, mechanical Cheebtsam, thiab choj.
II. Kev sib piv ntawm cov ntaub ntawv uas zoo sib xws rau S275JR
Raws li cov qauv thoob ntiaj teb thiab kev siv tau zoo, cov ntaub ntawv hauv qab no zoo ib yam li S275JR hauv lub zog, kev ua tau zoo, thiab kev siv:
1. ASTM A36 (American Standard)
- Zoo sib xws: Yield zog Ntau dua los yog sib npaug rau 250 MPa, tensile zog 400-550 MPa, qis carbon tsim (C Tsawg dua los yog sib npaug rau 0.26%), weldability zoo heev.
- Qhov txawv: A36 muaj cov ntsiab lus sulfur thiab phosphorus siab dua me ntsis (S Tsawg dua lossis sib npaug li 0.05%), tab sis nws qhov kev ua tau zoo tuaj yeem ua kom zoo dua los ntawm kev kho cua sov.
2. EN 10025-2 S235JR (European Standard)
- Zoo sib xws: Ob leeg tsis yog- alloy steels, yield zog Ntau dua lossis sib npaug li 235 MPa, siab dua elongation (Ntau dua lossis sib npaug li 26%).
- Qhov txawv: me ntsis qis zog, haum rau cov ntawv thov nrog cov kev xav tau qis dua, xws li cov qauv hnyav.
3. Q235B (Suav GB / T 700)
- Zoo sib xws: Yield zog Ntau dua los yog sib npaug rau 235 MPa, tensile zog 375-500 MPa, muaj pes tsawg leeg zoo sib xws (C Tsawg dua lossis sib npaug li 0.20%).
- Qhov txawv: Kev cuam tshuam kev ua haujlwm tsis tas yuav tsum tau ua; Cov xwm txheej ntxiv (xws li Q235B·Z) yuav tsum tau xaiv raws li qhov yuav tsum tau ua.
4. SS400 (Nyiv Standard JIS G3101)
- Zoo sib xws: Tensile lub zog 400-510 MPa, elongation Ntau dua lossis sib npaug li 17%, feem ntau siv hauv cov qauv dav dav.
- Qhov txawv: Tsis muaj qhov qhia meej tawm lub zog xav tau; yuav tsum tau ua tib zoo xyuas thaum tsim.
III. Cov lus pom zoo xaiv cov khoom siv thiab kev tshawb xyuas txuas ntxiv
1. Ua ntej tus qauv sib npaug: Hauv EU cov haujlwm, S275JR tuaj yeem hloov ncaj qha los ntawm S235JR (yog tias muaj zog tso cai); Hauv Asmeskas kev lag luam, ASTM A36 yog lwm txoj hauv kev.
2. Kev hloov pauv ib puag ncig: Rau qis- qhov kub thiab txias, hloov mus rau S275J2 (-20℃cuam tshuam kev ua haujlwm) lossis ANSI A572 Gr.50.
3. Tus nqi tseem ceeb: Q235B thiab SS400 feem ntau pheej yig dua, tab sis lawv qhov tsim nyog rau cov kev xav tau tshwj xeeb yuav tsum tau soj ntsuam.
S275JR Hollow Section Hoobkas
