P355NH steel vs P460NH steel

Material P355NH steel and P460NH are pressure vessel steel grades under EN10028-3 standard. P355NH steel is a non-alloy quality steel, while P460NH steel is a alloy special steel.
P355NH steel and P460NH steel in chemical composition(cast analysis, %)

Grades	C max	Si max	Mn	P max	S max	Al(min)	N max	Cr max	Cu max	Mo max	Nb max	Ni max	Ti max	V max	Nb+Ti+ V max
P355NH	0.18	0.50	1.10-1.70	0.025	0.010	0.020	0.012	0.30	0.30	0.08	0.05	0.50	0.03	0.10	0.12
P460NH	0.20	0.60	1.10-1.70	0.025	0.010	0.020	0.025	0.30	0.70	0.10	0.05	0.80	0.03	0.20	0.22

 
Mechanical properties:

Grade	Thickness mm	Yield strength ReH MPa min.	Tensile strength MPa	Elongation % min.
P355NH	≤16	355	490~630	22
	16<t≤40	345	490~630	22
	40<t≤60	335	490~630	22
	60<t≤100	315	470~610	21
	100<t≤150	305	460~600	21
	150<t≤250	295	450~590	21
P460NH	≤16	460	570~730	17
	16<t≤40	445	570~720	17
	40<t≤60	430	570~720	17
	60<t≤100	400	540~710	-
	100<t≤250	-	-	-

We can supply P355NH steel and P460NH normalized steel plates thickness up to 250mm. Welcome to contact us if you are interested in our weldable fine grain structural steel.