P275NH steel is a weldable fine-grain steel suitable for the fabrication of pressure vessels for pressurised gases and chemicals, industrial boilers, compressors and heat exchangers.P275NH steel is intended for use in moderate to high temperature service.
Under the standard EN10028_3 , P275NH and P275NH steel plate shall be both under Normalized delivery condition when processing.These steel grade P275NH and P275N mainly used in pressure vessels and boilers differ from other carbon_manganese structural steel plates owning to its high resistance to pressure at all temperatures when usage.
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P275NH Chemical Composition |
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C |
P |
S |
N |
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P275NH |
0.16 |
0.40 |
0.5-1.40 |
0.030 |
0.020 |
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0.02 |
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V |
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0.30 |
0.30 |
0.08 |
0.005 |
0.50 |
0.03 |
0.05 |
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Carbon Equivalent: Ceq=【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%
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P275NH |
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P275NH |
-20℃ |
0℃ |
+20℃ |
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<= 16 |
275 |
390-510 |
24 |
47 |
55 |
63 |
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16> to <=35 |
275 |
390-510 |
24 |
47 |
55 |
63 |
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35> to <=50 |
265 |
390-510 |
24 |
47 |
55 |
63 |
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50> to <=70 |
255 |
390-510 |
24 |
47 |
55 |
63 |
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70> to <=100 |
235 |
370-490 |
23 |
47 |
55 |
63 |
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100> to <=150 |
235 |
350-470 |
23 |
47 |
55 |
63 |
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Equivalent steel grade of P275NH |
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BS 1501 |
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WSt E285 |
224 Gr. 430 |
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A516 Gr. 60 |
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Its primary use is in the fabrication of boilers and pressure vessels that carry pressurized gases and chemicals.
Also suitable for industrial applications like heat exchangers and compressors.
Due to its strength and weldability, it's also used in high-stressed welded constructions in shipbuilding, hydraulic steelwork, and general constructional steelwork.
