1. Khaus Kub Kub Ranges & Cov Khoom Siv Hloov
(1) Thaum kub qis (-40 Qib rau 0 degree)
Yield / Tensile Lub Zog: Nce me ntsis (5-10%) raws li qhov ntsuas kub. Piv txwv li, kom lub zog (tsawg dua los yog sib npaug rau 16 hli thickness) nce los ntawm 355 MPa (20 qib) rau ~ 370 MPA ntawm -20 degree.
Ductility (elongation): Maj mam txo qis. Ntawm -40 degree, elongation yuav poob rau 15-18% (los ntawm ntau dua lossis sib npaug nrog 20-40 hli thickness), tab sis tseem txaus kom tsis txhob muaj kev tiv thaiv brittlecation.
Kev Cuam Tshuam: Cov khoom rhiab tshaj plaws. S3555J0WP yog ntsuas rau 0℃cuam tshuam tsis kam (ntau dua los yog sib luag rau 27 j), tab sis kev tawv me me kom qis dua qhov no:
Ntawm - 10 degree: kev cuam tshuam lub zog (kv) txo mus rau ~ 20-25 J (ze ntawm qhov kev hloov pauv dav-zom).
Ntawm -20℃rau -40 degree: poob rau<20 J, increasing the risk of brittle fracture under dynamic loads (e.g., impacts, sudden stress).
(2) qhov kub amient (0 Qib rau 100 degree)
Yield / Tensile Lub Zog: Ruaj khov thiab ua raws li cov qauv txiaj ntsig (tawm ntau dua lossis sib npaug nrog 335-355 MPa, tensile 470 MPA). Tsawg heev hloov pauv (<3%) within this range.
Kev ua siab loj: Optimal - Elongation nyob qis dua lossis sib npaug rau 16-22% (los ntawm cov tuab), khoov, vuam tsis zoo.
Kev Cuam Tshuam: Ua tau raws li EN 10025-5 -5 yuav tsum muaj (ntau dua los yog sib npaug ntawm 0-100℃(kV ntau dua lossis sib npaug nrog kev pheej hmoo pheej hmoo.
(3) qhov kub ntxhov siab (100℃rau 300 degree)
Yield / Tensile Lub Zog: Maj mam txo li kub nce. Los ntawm 300 degree:
Tos lub zog zuj zus los ntawm ~ 20-25% (piv txwv li, 35 mpa → ~ 270 mpa kom tsawg dua lossis sib luag rau 16 hli thickness).
Lub zog tensile txo qis los ntawm ~ 10-15% (piv txwv li, 470-630 MPa → ~ 400-540 mpa) MPA).
Kev ua siab loj: Nce me ntsis (elongation +2}}}}}}), ua rau cov hlau ua kom tsis tshua meej tab sis tsis tshua muaj zog tab sis tsis tshua muaj zog.
Kev Cuam Tshuam: Tseem muaj txiaj ntsig zoo (KV loj dua lossis muaj sib npaug rau 25-30 J), raws li qhov siab kub siab rau qhov chaw siab tshaj plaws uas tsis ua rau brittleness tsis yog
(4) High Temperatures (>300 DEGREE)
Yield / Tensile Lub Zog: Poob qis. Saum toj 400 degree, tawm los ua zog poob los ntawm 40-50% (vs. Acient), thiab cov qauv hluav taws xob nruj yog txo qis.
Kev ua siab loj: Continues to rise, but the steel becomes prone to creep (slow plastic deformation under sustained load) - not suitable for long-term service at >300 degree.
Kev Cuam Tshuam: Seem tab sis tsis cuam tshuam rau qhov siab -} qhov kev siv dej txias, raws li nkag yog qhov kev pheej hmoo thawj.
2. Cov feem cuam tshuam rau kev siv
Tsawg - kub txwv: Zam kev siv S355j0wP nyob rau hauv ib puag ncig hauv qab no {10 degree}}}} tus choj txuas ntxiv (piv txwv li, txias machinery). Tau -20℃rau -40 degree, xaiv S355j2WP (ntsuas rau -20℃cuam tshuam) hloov.
Airient / Nruab qhov kub: Qhov zoo tshaj plaws rau cov txheej txheem sab nraum zoov feem ntau (cladfarts, tuav phab ntsa)}}} Cov khoom siv ruaj khov, thiab kev ua tau zoo nrog cov kev cia siab tsim qauv.
High -} kub thiab txias scenarios: Not suitable for long-term service in heat-exposed components (eg, near industrial furnaces, exhaust systems) - use heat-resistant steels (eg, EN 1.4903) if temperatures exceed 300℃.
