Qhov sib txawv ntawm S275NL thiab S355NL steel phaj - Kev Paub

S275NL thiab S355NL yog European tus qauv (EN 10025-3) weldable, nplua-cov khoom siv hlau, ob qho tib si normalized rau zoo heev qis-kub toughness (27 Joules ntawm -50℃), tab sis S355NL muaj zog ntau dua (mina{8} tuab) piv rau cov phaj tuab S275NL (min. 275 MPa yield), ua S355NL zoo dua rau cov khoom siv hnyav xws li txuas hniav thiab tshuab, thaum S275NL yog qhov pheej yig dua rau cov khoom sib zog, ob qho tib si zoo tagnrho rau qhov chaw txias.

Chemical Composition Sib txawv

Element	Cim	S275NL Min (%)	S275NL Max (%)	S355NL Min (%)	S355NL Max (%)
Cov pa roj carbon	C	-	0.16	-	0.18
Silicon	Si	-	0.40	-	0.50
Manganese	Mn	0.50	1.50	0.90	1.65
Nickel	Ni	-	0.30	-	0.50
Phosphorus	P	-	0.025	-	0.025
Sulfur	S	-	0.020	-	0.020
Chromium	Cr	-	0.30	-	0.30
Molybdenum	Mo	-	0.10	-	0.10
Vanadium	V	-	0.05	-	0.12
Nitrogen	N	-	0.015	-	0.015
Niobium	Nb	-	0.05	-	0.05
Titanium	Ti	-	0.05	-	0.05
Aluminium	Al	-	0.020	0.020	-
Tooj	Cu	-	0.55	-	0.55
CEV	-	-	0.40	-	0.43

Mechanical Properties Sib piv

Nominal Thickness (hli)	Yield zog ReH Min (MPa) S275NL	Yield Strength ReH Min (MPa) S355NL	Tensile zog Rm (MPa) S275NL	Tensile zog Rm (MPa) S355NL	Elongation A Min (%) Ob leeg	Charpy KV Longitudinal Min (J) ntawm -50℃Ob leeg
Tsawg dua los yog sib npaug li 16	275	355	370–510	470–630	24	27
16	265	345	370–510	470–630	24	27
40	255	335	370–510	470–630	24	27
63	245	325	370–510	470–630	23	27
80	235	315	370–510	470–630	23	27
100	225	295	350–480	450–600	23	27
150	215	285	350–480	450–600	23	27
200	205	275	350–480	450–600	23	27

Qhov tseem ceeb sib txawv & Zoo sib xws

Lub zog: S355NL muaj qhov tsawg kawg nkaus tawm los (355 MPa) thiab lub zog tensile (470-630 MPa) dua S275NL (275 MPa tawm los, 370-510 MPa tensile), suiting hnyav loads.

Kev Ua Haujlwm Kub Kub: Ob leeg lav 27 Joules cuam tshuam lub zog ntawm -50℃(NL lus kawg), zoo tagnrho rau huab cua txias.

Muaj pes tsawg leeg: S355NL tso cai me ntsis siab dua carbon, silicon, manganese, thiab vanadium kom muaj zog, tab sis ob qho tib si tuav qis phosphorus / sulfur rau toughness.

Cov ntawv thov: S355NL yog rau qhov nyuaj siab (cov tshuab hnyav, txuas hniav), thaum S275NL yog rau sib dua -lub luag haujlwm, tus nqi- cov haujlwm rhiab heev xav tau txias toughness.

Cov qauv: Ob leeg poob rau hauv EN 10025-3 rau cov hlau zoo li qub, txhais tau tias lawv tau ua tiav rau cov qauv zoo thiab cov tawv tawv.

Daim Ntawv Thov thiab Cov Txheej Txheem Xaiv
S275NL: Tus nqi- siv tau rau cov khoom nruab nrab hauv cov huab cua txias (xws li cov choj txheem, cranes). Saib en 10025 3 s275nl normalized structural steel phaj.
S355NL: Txaus siab rau kev xav tau siab - lub zog xav tau hauv cov qauv xav tau xws li offshore platforms, hnyav- cov kav dej, lossis cov cua turbine hauv paus. Saib en 10025 3 s355nl normalized structural steel phaj.