Difference between P295GH and P355GH steel plate

Dec 10, 2025 Laat een bericht achter

P295GH and P355GH are normalized, non-alloy steel plates from the EN 10028-2 standard, primarily used for boilers, pressure vessels, and heat exchangers due to their excellent weldability and properties at elevated temperatures.

The key difference lies in their strength: P295GH offers a minimum yield strength around 295 MPa (depending on thickness), while P355GH is stronger, typically featuring a minimum yield strength of 355 MPa (also varying with thickness), making it suitable for more demanding high-pressure applications.

P295GH Chemical Composition

	C			P	S		N
P295GH	0.08-0.20	0.40	0.80-1.50	0.025	0.015	0.020	0.012
							V
	0.30	0.30	0.08	0.020	0.30	0.03	0.02

Carbon Equivalent: Ceq=【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%

P355GH Chemical Composition

	C			P	S		N
P355GH	0.10-0.22	0.60	1.10-1.70	0.025	0.015	0.020	0.012
							V
	0.30	0.30	0.08	0.040	0.30	0.03	0.02

		P295GH

P295GH					-20℃	0℃	+20℃
	<= 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

		P355GH Mechanical Property

P355GH					-20℃	0℃	+20℃
	<= 16	355	510-650	20	27	34	40
	16> to <=40	345	510-650	20	27	34	40
	40> to <=60	335	510-650	20	27	34	40
	60> to <=100	315	490-630	20	27	34	40
	100> to <=150	295	480-630	20	27	34	40
	150> to <=250	280	470-630	20	27	34	40

Standard: EN 10028-2 (for pressure vessels).

Material Type: Non-alloy steel with specified elevated temperature properties.

Applications: Boilers, pressure vessels, heat exchangers, piping in the oil & gas industry.

Properties: Good weldability, toughness, and resistance to elevated temperatures.

P295GH: Lower strength grade, often with a minimum yield strength around 295 MPa.

P355GH: Higher strength grade, with a minimum yield strength of 355 MPa for thinner plates, decreasing slightly with thickness.

In essence, P355GH offers higher strength for heavier-duty applications compared to P295GH, while both excel in high-temperature, high-pressure environments.