Cov txheej txheem EuropeanS355J2 (EN 10025-2)muaj ib qho tshwj xeeb hauv tsev sib npaug tshaj S355JR vim nws cov kev xav tau hnyav dua.
Qhov ncaj qha thiab raug hauv tsev (Suav GB tus qauv) sib npaug rau S355J2 yog Q355D raws li tus qauv thawj GB / T 1591-2018 (High lub zog qis alloy qauv steels).
Nov yog cov ncauj lus kom ntxaws:
1. Qhov sib npaug tseem ceeb: Q355D (GB/T 1591-2018)
Qhov no yog qhov ncaj, qib-rau- qib sib tw.
Qhov tseem ceeb sib piv Parameter - Impact Toughness:Qhov no yog qhov tseem ceeb tshaj qhov txawv ntawm "J2" los ntawm lwm qib.
S355J2: Yuav tsum muaj qhov tsawg kawg nkaus Charpy V-qhov cuam tshuam lub zog ntawm 27 Joules ntawm -20 ° C.
Q355D: Yuav tsum muaj qhov tsawg kawg nkaus Charpy V-qhov cuam tshuam lub zog ntawm ≥ 34 Joules ntawm -20 ° C.
Kev tsom xam:Q355D tsis yog qhov sib tw nkaus xwb tab sis tshaj qhov yuav tsum tau muaj zog ntawm S355J2 (ob leeg ntawm -20 ° C, nrog tus nqi qis dua). Qhov no ua rau nws muaj peev xwm ua tau zoo thiab feem ntau hloov pauv zoo dua.
Mechanical Strength: Ob leeg muaj qhov zoo tib yam yam tsawg kawg nkaus tawm los (355 MPa rau thickness ≤16mm) thiab tensile zog (470-630 MPa) ntau yam.
Tshuaj muaj pes tsawg leeg:Cov kev xav tau rau cov ntsiab lus xws li Carbon, Manganese, Phosphorus, thiab Sulfur yog ua raws li kev ua kom tau raws li cov khoom siv thiab lub zog.
Txheej txheem deoxidation:Ob leeg S355J2 thiab Q355D yuav tsum tau tua tag nrho (zoo grain) steels, feem ntau yog siv Aluminium los yog lwm yam nplej -refining ntsiab.
2. Sib piv nrog rau lwm cov qib uas muaj feem xyuam
Txhawm rau kom tsis txhob muaj kev ntxhov siab, nws yog ib qho tseem ceeb kom paub qhov txawv ntawm lwm cov qib:
| Qib European (EN 10025-2) | Impact toughness yuav tsum tau | Direct Suav sib npaug (GB / T 1591) | Impact toughness yuav tsum tau | Saib |
|---|---|---|---|---|
| S355 JR | 27J @ +20°C | Q355B | ≥34J @ +20°C | Rau chav kub kev pab cuam |
| S355J0 | 27 J @ 0°C dej | Q355C | ≥34J @ 0 ° C | Rau qis- qhov kub thiab txias (teeb) |
| S355J2 | 27 J @ -20 ° C | Q355D | ≥34J @ -20 ° C | Nov yog koj qhov kev sib tw. |
| S355K2 | 27J @ -20 ° C (ntxiv rau siab zog tensile) | (Tsis muaj kev sib tw ncaj qha) | Cov chav sib txawv zog. | |
| S355 NL | 27 J @ -50 ° C | Q355E | ≥27J @ -40 ° C | Q355E nyob ze tab sis tsis zoo ib yam. |
3. Cov qauv tsim nyog rau cov khoom sib txawv
Cov Qauv Txheej Txheem / Kev Siv dav dav: GB / T 1591-2018 yog cov qauv khoom tseem ceeb.
Hlau Phaj: Koj tuaj yeem hais qhia Q355D raws li GB / T 3274 (Kub- dov steel phaj, ntawv thiab strips rau cov qauv), uas yuav hais txog cov tshuaj thiab cov khoom siv ntawm GB / T 1591.
Seamless Tubes / Pipes: Rau cov qauv hollow seem, qhov sib npaug yuav raug teev raws li Q355D nyob rau hauv cov qauv xws li GB/T 6728 rau txias - cov seem tsim.
Cov lus qhia txog kev xaiv thiab kev yuav khoom tseem ceeb:
Ib txwm Qhia Q355D: Rau cov khoom tsim los rau S355J2, tshwj xeeb tshaj yog thaum -20 ° C cuam tshuam qhov hnyav yog qhov yuav tsum tau tsim (xws li, rau cov qauv sab nraum zoov hauv huab cua txias, cua yees, qee qhov txuas txuas), koj yuav tsum siv Q355D.
Tsis txhob Downgrade rau Q355B lossis Q355C: Siv Q355B (+20°C cuam tshuam) lossis Q355C (0°C cuam tshuam) los hloov S355J2 yuav tsis raug thiab tsis muaj kev nyab xeeb yog tias qis- qhov kub thiab txias yog qhov tseem ceeb.
Upgrading yog ua tau:Yog tias koj tsuas muaj S355J2 ntawm daim duab tab sis qhov tseeb qhov kev pabcuam kub qis dua (xws li -30 ° C txog -40 ° C), koj yuav qhia Q355E. Txawm li cas los xij, rau qhov sib npaug ncaj qha, Q355D yog qhov kev xaiv raug.
Yam Lus:Qhia meej meej hauv koj daim ntawv xaj / khoom thov:
"Cov ntaub ntawv: Q355D raws li GB / T 1591-2018."
(Rau daim phiaj, koj tuaj yeem ntxiv "los yog GB / T 3274").
Xaus:
Cov khoom siv hauv tsev tag nrho sib npaug rau S355J2 yog Q355D. Nws phim lub zog, sib haum nrog qhov tseem ceeb -20 ° C qhov kev pab cuam qhov kub thiab txias, thiab tshaj qhov tsawg kawg nkaus qhov yuav tsum tau muaj zog. Qhov no yog tus qauv, txais kev hloov pauv hauv Suav tsim thiab kev tsim kho rau European-tsim Cheebtsam uas qhia txog S355J2.