EN 10028-3:2017 P355NH Steel: Specifications & Listings
EN 10028-3:2017 P355NH: P355NH: weldable fine grain normalized steel flat product for pressure purposes, elevated temperature quality (steel number 1.0565). Specified in EN 10028-3:2017.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Si
Mn
P
S
Al
N
Cr
Cu
Mo
Nb
Ni
Ti
V
<=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
Mechanical Properties
Tensile Strength
490-630 MPa
Yield Strength
>=355 MPa
Elongation
>=22%
Condition
Normalized, nominal thickness up to 16 mm
More data from EN 10028-3:2017
From the standard
Yield and tensile strength by thickness6 thickness ranges
Thickness (mm)
Yield strength ReH, min (MPa)
Tensile strength Rm (MPa)
up to 16
355
490 to 630
over 16 to 40
345
490 to 630
over 40 to 60
335
490 to 630
over 60 to 100
315
470 to 610
over 100 to 150
305
460 to 600
over 150 to 250
295
450 to 590
Normalized condition.
Source: EN 10028-3:2017, Table 4
Elongation by thickness6 thickness ranges
Thickness (mm)
Elongation A, min (%)
up to 16
22
over 16 to 40
22
over 40 to 60
22
over 60 to 100
21
over 100 to 150
21
over 150 to 250
21
Source: EN 10028-3:2017, Table 4
Proof strength Rp0.2 at elevated temperatureRp0.2 min in MPa, 6 thickness ranges
Thickness (mm)
50 deg C
100 deg C
150 deg C
200 deg C
250 deg C
300 deg C
350 deg C
400 deg C
up to 16
343
323
299
275
252
232
214
202
over 16 to 40
334
314
291
267
245
225
208
196
over 40 to 60
324
305
282
259
238
219
202
190
over 60 to 100
305
287
265
244
224
206
190
179
over 100 to 150
295
277
257
236
216
199
184
173
over 150 to 250
285
268
249
228
209
192
178
167
Minimum Rp0.2 in MPa for furnace normalized test pieces. If agreed at enquiry, these values may also apply to the NL1 and NL2 grades of the same strength.
Source: EN 10028-3:2017, Table 5
Minimum impact energy KV2KV2 min in J, thickness up to 250 mm
Direction
-50 deg C
-40 deg C
-20 deg C
0 deg C
+20 deg C
Transverse
-
-
30 (a)
40
50
Longitudinal
-
-
45
65
75
Footnote a: a minimum value of 40 J may be agreed at the time of enquiry and order.
Source: EN 10028-3:2017, Table 6
Maximum carbon equivalent value (CEV)3 thickness ranges
Thickness t (mm)
CEV, max
up to 60
0.43
over 60 to 100
0.45
over 100 to 250
0.45
Applies only if agreed at the time of enquiry and order. CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15.
Source: EN 10028-3:2017, Table 3
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