EN 10028-2:2017 13CrMo4-5 Steel: Specifications & Listings
EN 10028-2:2017 13CrMo4-5: 13CrMo4-5: chromium molybdenum alloy special steel for pressure purposes with specified elevated temperature properties. Specified in EN 10028-2:2017.
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
N
Cr
Cu
Mo
0.08-0.18
<=0.35
0.40-1.00
<=0.025
<=0.010
<=0.012
0.70-1.15
<=0.30
0.40-0.60
Mechanical Properties
Tensile Strength
450-600 MPa
Yield Strength
>=300 MPa
Elongation
>=19%
Condition
Usual delivery condition normalized and tempered (+NT), nominal thickness up to 16 mm; transverse direction, Yield Strength is ReH, Elongation is A
More data from EN 10028-2:2017
From the standard
Mechanical properties by thickness5 thickness ranges
Delivery condition
Thickness t (mm)
Yield strength ReH, min (MPa)
Tensile strength Rm (MPa)
Elongation A, min (%)
+NT
up to 16
300
450 to 600
19
+NT
over 16 to 60
290
450 to 600
19
+NT
over 60 to 100
270
440 to 590
19
+NT or +QT
over 100 to 150
255
430 to 580
19
+QT
over 150 to 250
245
420 to 570
19
Transverse direction; usual delivery condition as stated per row.
Source: EN 10028-2:2017, Table 3
Impact energy KV2 (Charpy V-notch)2 rows
Condition or thickness
KV2 min at -20 deg C (J)
KV2 min at 0 deg C (J)
KV2 min at +20 deg C (J)
up to 100 mm
-
-
31
over 100 to 250 mm
-
-
27
A dash means a value may be agreed at the time of enquiry and order; 40 J may be agreed at +20 deg C where 31 or 27 J is listed.
Source: EN 10028-2:2017, Table 3
Proof strength at elevated temperature5 thickness ranges, 50 to 500 deg C
Thickness t (mm)
Rp0.2 min at 50 deg C (MPa)
Rp0.2 min at 100 deg C (MPa)
Rp0.2 min at 150 deg C (MPa)
Rp0.2 min at 200 deg C (MPa)
Rp0.2 min at 250 deg C (MPa)
Rp0.2 min at 300 deg C (MPa)
Rp0.2 min at 350 deg C (MPa)
Rp0.2 min at 400 deg C (MPa)
Rp0.2 min at 450 deg C (MPa)
Rp0.2 min at 500 deg C (MPa)
up to 16
294
285
269
252
234
216
200
186
175
164
over 16 to 60
285
275
260
243
226
209
194
180
169
159
over 60 to 100
265
256
242
227
210
195
180
168
157
148
over 100 to 150
250
242
229
214
199
184
170
159
148
139
over 150 to 250
235
223
215
211
199
184
170
159
148
139
Minimum 0.2 percent proof strength; delivery condition as given in Table 3.
Source: EN 10028-2:2017, Table 4
Heat treatment guidelineguideline temperatures
Normalizing temperature
890 to 950 deg C
Quenching temperature
-
Tempering temperature
630 to 730 deg C
Informative guideline (Annex A).
Source: EN 10028-2:2017, Table A.1
Stress relieving guidance (Pcrit)Pcrit and holding time
Pcrit value
18.5
Stress relieving temperature for 1 h holding
650 deg C
Stress relieving temperature for 2 h holding
635 deg C
Selected pairs of stress relieving temperature and holding time for guidance (Annex B).
Source: EN 10028-2:2017, Table B.1
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