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P250GH Flanges | EN 1092-1

EN 1092-1 flanges made from P250GH steel in accordance with EN 10222-1 (forgings) or EN 10273 (bars); Supplied to Hungary.

  • Description

EN 1092-1 flanges can be made from P250GH forgings (EN 10222-2) or bars (EN 10273) with specified elevated temperatures properties. The P250GH steel is classified into material group 3E0 with material number 1.0460. It shall be furnished in normalized condition with normalizing temperature at 890°C~950°C.

Chemical Composition Requirements

ElementComposition, %
for P250GH of
EN 10222-2
Composition, %
for P250GH of
EN 10273
C0.18-0.230.18-0.23
Si≤0.40≤0.40
Mn0.30-0.900.30-0.90
P≤0.025≤0.025
S≤0.015≤0.015
Al≥0.020≥0.020
N≤0.012≤0.012
Cr≤0.30≤0.30
Cu≤0.30≤0.30
Mo≤0.08≤0.08
Nb≤0.010≤0.020
Ni≤0.30≤0.30
Ti≤0.03≤0.03
V≤0.02≤0.02
Cr+Cu+Mo+Ni≤0.70≤0.70
CE0.430.43
*All values shall be based on cast analysis; A ratio Al/N ≥ 2 shall apply; CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15.

Mechanical Properties

Diameter or
Thickness, d
ReH
MPa
Rm
MPa
A
%
d≤50≥250410-540≥25
50<d≤100≥240410-540≥25
100<d≤150≥230410-540≥25
*Table A-1: mechanical properties at room temperature for EN 1092-1 flanges made from EN 10273 P250GH hot rolled bars.
*ReH: yield strength; Rm: tensile strength; A: elongation after fracture (longitudinal); d: diameter or thickness of the bar, mm.
*The minimum impact energy value (longitudinal) for EN 10273 P250GH at temperatures of -20°C, 0°C, and +20°C shall be 27J, 40J, and 47J, respectively.

Temp.
°C
Rp0.2
d≤50
MPa
Rp0.2
50<d≤100
MPa
Rp0.2
100<d≤150
MPa
50242234224
100237230220
150216210200
200190185175
250170165155
300150145135
350130125115
40011010090
450908070
*Table A-2: minimum proof strength values Rp0.2 at elevated temperatures for EN 10273 P250GH.

Temp.
°C
Creep Rupture Strength
in MPa for Time
104h105h2x105h
380229165145
390211148129
400191132115
410174118101
42015810389
4301429178
4401277967
4501136957
4601005948
470865042
480754233
*Table A-3: creep rupture strength values for EN 10273 P250GH at elevated temperatures for a given testing time period.

Tr
mm
ReH
MPa
min
Rm
MPa
A, %
min
KV2
min J
Tr≤60250410-54025 (l)
20 (t)
44 (l)
31 (t)
60<Tr≤105240410-54025 (l)
20 (t)
44 (l)
31 (t)
105<Tr≤225230410-54025 (l)
19 (t)
44 (l)
31 (t)
225<Tr≤375210400-52025 (l)
19 (t)
40 (l)
27 (t)
375<Tr≤750200400-52025 (l)
19 (t)
40 (l)
27 (t)
*Table B-1: mechanical properties at room temperature for EN 1092-1 flanges made from EN 10222-2 P250GH forgings.
*ReH: yield strength; Rm: tensile strength; A: elongation after fracture (longitudinal & transverse); Tr: thickness of the ruling section; KV2: impact energy (longitudinal & transverse).

Temp.
°C
Rp0.2
min. MPa
Tr1
Rp0.2
min. MPa
Tr2
Rp0.2
min. MPa
Tr3
100237230220
150216210200
200190185175
250170165155
300150145135
350130125115
40011010090
450908070
*Table B-2: minimum proof strength values Rp0.2 at elevated temperatures for EN 10222-2 P250GH flanges with thickness of Tr1≤60,  60<Tr2≤105, 105<Tr3≤225.

Temp.
°C
Rp0.2
min. MPa
Tr4
Rp0.2
min. MPa
Tr5
100200190
150180170
200160155
250140135
300125115
350105100
4008580
4506560
*Table B-3: minimum proof strength values Rp0.2 at elevated temperatures for EN 10222-2 P250GH flanges with thickness of 225<Tr4≤375, 375<Tr3≤750.

Temp.
°C
Average Rupture Stress
for Time Period,
MPa
1041052x105
380229165145
390211148129
400191132115
410174118101
42015810389
4301429178
4401277967
4501136957
4601005948
470865040
480754233
*Table B-4: creep rupture strength values for EN 10222-2 P250GH at elevated temperatures for a given testing time period.

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