Difference between P295GH and P355GH

Dec 15, 2025 Leave a message

P295GH and P355GH are both non-alloy steels for pressure vessels (EN 10028-2), but the main difference is their strength: P355GH offers a higher minimum yield strength (around 355 MPa for thinner plates) compared to P295GH (around 295 MPa), making P355GH suitable for more demanding, higher-pressure applications, with P355GH often requiring normalization heat treatment for its properties, while both serve in boilers and tanks.

Mechanical Properties of EN 10028 – P295GH

Type	Thickness (mm)	Yield Strength MPa (min)	Tensile Strength MPa	Elongation % (min)	Impact Energy (KV J) (min)
					-20°	0°	+20°
Normalized	≤ 16	295	460 - 580	21	27	34	40
	16> to ≤40	290	460 - 580	21	27	34	40
	40> to ≤60	285	460 - 580	21	27	34	40
	60> to ≤100	260	460 - 580	21	27	34	40
	100> to ≤150	235	440 - 570	21	27	34	40
	150> to ≤250	220	430 - 570	21	27	34	40

Mechanical Properties of EN 10028 – P355GH

Type	Thickness (mm)	Yield Strength MPa (min)	Tensile Strength MPa	Elongation % (min)	Impact Energy (KV J) (min)
					-20°	0°	+20°
Normalized	≤ 16	355	510 - 650	21	27	34	40
	16> to ≤40	345	510 - 650	21	27	34	40
	40> to ≤60	335	460 - 580	21	27	34	40
	60> to ≤100	315	490 - 630	21	27	34	40
	100> to ≤150	295	480 - 630	21	27	34	40
	150> to ≤250	280	470 - 630	21	27	34	40

Chemical Composition of EN 10028 – P295GH

C	0.08 to 0.20
Si	≤0.40
Mn	0.90 to 1.50
P	0.025
S	0.015
Al	≤0.020
N	≤0.012
Cr	≤0.30
Cu	≤0.30
Mo	≤0.08
Nb	≤0.020
Ni	≤0.30
Ti	0.03
Vi	≤0.02

Chemical Composition of EN 10028 – P355GH


C	0.10 to 0.22
Si	≤0.60
Mn	0.10 to 1.70
P	0.025
S	0.015
Al	≤0.020
N	≤0.012
Cr	≤0.30
Cu	≤0.30
Mo	≤0.08
Nb	≤0.020
Ni	≤0.30
Ti	0.03
Vi	≤0.02