S355NL vs S355J2: Weldability
S355NL vs S355J2 weldability yog ib qho tseem ceeb thaum xaiv ntawm cov qauv steels raws li EN 10025 tus qauv. S355NL, tau teev tseg raws li EN 10025-3, yog qhov zoo ib yam zoo-cov hlau ua kom zoo rau qis- qhov kub thiab txias, thaum S355J2, nyob rau hauv EN 10025-2, yog cov kub dov tsis-alloy steel rau kev siv dav dav. Qhov sib txawv ntawm S355J2 thiab S355NL nyob rau hauv weldability stems los ntawm lawv cov tshuaj muaj pes tsawg leeg thiab ua, cuam tshuam fabrication yooj yim thiab kev ua tau zoo nyob rau hauv welded lug.
Kab lus no sib piv lawv cov weldability, tshuaj muaj pes tsawg leeg, txhua yam khoom, thiab kev siv, hais txog cov ntsiab lus tseem ceeb s355nl vs s355j2 thiab qhov sib txawv ntawm s355j2 thiab s355nl. Yog xav paub ntxiv, mus saib peb EN 10025-3 S355NL normalized structural steel phaj.
Txheej txheem cej luam ntawm S355NL thiab S355J2
S355NL (EN 10025-3)
S355NL yog ib qho zoo -cov qauv hlau, zoo li qub lossis zoo li qub, nrog rau:
S: Cov qauv hlau.
355: Tsawg tshaj tawm lub zog ntawm 355 MPa (tsawg dua lossis sib npaug li 16 hli).
NL: Normalized, nrog rau kev cuam tshuam toughness kuaj ntawm -50 degree.
Nws zoo - cov qauv nplej txhim kho weldability thiab toughness nyob rau hauv cov huab cua txias.
S355J2 (EN 10025-2)
S355J2 yog ib qho uas tsis yog- alloy structural steel, feem ntau kub- dov, nrog:
S: Cov qauv hlau.
355: Tsawg tshaj tawm lub zog ntawm 355 MPa (tsawg dua lossis sib npaug li 16 hli).
J2: Impact toughness kuaj ntawm -20 degree.
S355J2 yog tus nqi- zoo rau kev tsim kho hauv huab cua sov.
Kev sib piv Weldability
Qhov txawv ntawm S355J2 thiab S355NL hauv weldability yog tsav los ntawm lawv cov tshuaj muaj pes tsawg leeg thiab kev ua:
S355 NL:
Carbon Equivalent (CEV): Tsawg dua lossis sib npaug li 0.43% (Less dua lossis sib npaug li 63 mm), xam raws li CEV=C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu)/15.
Welding: Supports GMAW (Gas Metal Arc Welding) and SAW (Submerged Arc Welding) per EN 1011-2. Preheating (100-150°C) is recommended for thicknesses >20 hli los tiv thaiv hydrogen-induced cracking; tsis xav tau preheat rau nyias daim hlau.
Consumables: ER70S-6 (GMAW), EM12K flux nrog EH14 hlau (SAW).
Qhov zoo: Cov pa roj carbon tsawg (tsawg dua lossis sib npaug li 0.18%), sulfur (tsawg dua lossis sib npaug li 0.015%), thiab phosphorus (tsawg dua lossis sib npaug li 0.025%), ua ke nrog cov nplej- cov khoom ua kom zoo (Al, Nb), txo cov weld imperfections thiab txhim kho toughness nyob rau hauv cov mob khaub thuas.
Tom qab- Weld Heat Treatment (PWHT): Xaiv tau ntawm 550-650℃rau cov welds tseem ceeb, tsis tshua xav tau vim qis CEV.
S355J2:
CEV: Tsawg dua lossis sib npaug li 0.45% (tsawg dua lossis sib npaug li 40 mm), siab dua me ntsis vim tsis muaj kev tswj hwm tsis zoo.
Welding: Compatible with GMAW and SAW, but requires more preheating (125-175°C for >25 hli) vim muaj cov pa roj carbon ntau dua (tsawg dua lossis sib npaug li 0.20%) thiab impurities (P, S Tsawg dua lossis sib npaug li 0.025%).
Consumables: Ib yam li S355NL (ER70S-6, EM12K flux).
Kev Sib Tw: Cov pa roj carbon ntau dua thiab cov impurities ua rau muaj kev pheej hmoo ntawm kev sib tsoo tsis zoo xws li tawg, yuav tsum tau ceev faj ntau dua cov txheej txheem vuam.
PWHT: Tsis tshua xav tau, tab sis tuaj yeem siv rau cov ntu tuab kom txo tau qhov kev ntxhov siab.
Qhov Tseem Ceeb Weldability Qhov txawv: S355NL muaj qhov zoo tshaj plaws weldability vim nws qis CEV (Less dua los yog sib npaug rau 0.43% vs Tsawg dua los yog sib npaug rau 0.45%) thiab nplua - cov qauv nplej, txo qis preheating xav tau thiab weld imperfections piv rau S355J2. Qhov no ua rau S355NL vs S355J2 vuam tus nqi ntau dua - siv tau thiab txhim khu kev qha rau kev siv huab cua txias -.
Kev sib piv tshuaj lom neeg
Lub S355NL vs S355J2 weldability yog cuam tshuam los ntawm lawv cov compositions:
|
Element |
S355NL (EN 10025-3, Ladle, max %) |
S355J2 (EN 10025-2, max %) |
|---|---|---|
|
Cov pa roj carbon (C) |
0.18 |
0.20 |
|
Silicon (Si) |
0.50 |
0.55 |
|
Manganese (Mn) |
0.90-1.65 |
1.60 |
|
Phosphorus (P) |
0.025 |
0.025 |
|
Sulfur (S) |
0.015 |
0.025 |
|
Nitrogen (N) |
0.015 |
Tsis tau teev tseg |
|
Aluminium (Al) |
0.02 (min, tag nrho) |
Tsis tau teev tseg |
|
Niobium (Nb) |
0.05 |
Tsis tau teev tseg |
|
Vanadium (V) |
0.12 |
Tsis tau teev tseg |
|
Titanium (Ti) |
0.05 |
Tsis tau teev tseg |
|
Chromium (Cr) |
0.30 |
0.30 |
|
Nickel (Ni) |
0.30 |
0.30 |
|
Copper (Cu) |
0.55 |
0.55 |
FAQ:
Q: Koj puas yog lub Hoobkas lossis tuam txhab lag luam?
A: Peb yog cov chaw tsim khoom thiab muaj ntau xyoo kev tsim khoom thiab kev tswj xyuas.
Q: Cov nqe lus shipping yog dab tsi?
A: Peb lees txais FOB, CIF, CFR thiab lwm yam kev xa khoom thoob ntiaj teb. Chaw nres nkoj ntawm kev thauj khoom tuaj yeem teev raws li cov neeg siv khoom xav tau.
Q: Koj puas muaj kev pabcuam tom qab- muag?
A: Tau kawg, koj tuaj yeem tiv tauj peb txhua lub sijhawm.peb cog lus tias peb cov khoom tsim nyog. Yog tias koj pom cov khoom tsis tsim nyog thiab tsis txaus siab rau qhov koj xav tau, thov hu rau peb txhua lub sijhawm.
Cim npe nrov: en s355nl vs s355j2 qauv steel phaj, Tuam Tshoj en s355nl vs s355j2 qauv steel phaj manufacturers, lwm tus neeg, Hoobkas
