EN 10028-2:2017 X10CrMoVNb9-1 Steel: Specifications & Listings
EN 10028-2:2017 X10CrMoVNb9-1: X10CrMoVNb9-1: chromium molybdenum vanadium niobium 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
Al
N
Cr
Cu
Mo
Nb
Ni
V
0.08-0.12
<=0.50
0.30-0.60
<=0.020
<=0.005
<=0.040
0.030-0.070
8.00-9.50
<=0.30
0.85-1.05
0.06-0.10
<=0.30
0.18-0.25
Mechanical Properties
Tensile Strength
580-760 MPa
Yield Strength
>=445 MPa
Elongation
>=18%
Condition
Usual delivery condition normalized and tempered (+NT), nominal thickness up to 60 mm; transverse direction, Yield Strength is ReH, Elongation is A
More data from EN 10028-2:2017
From the standard
Mechanical properties by thickness3 thickness ranges
Delivery condition
Thickness t (mm)
Yield strength ReH, min (MPa)
Tensile strength Rm (MPa)
Elongation A, min (%)
+NT
up to 60
445
580 to 760
18
+NT
over 60 to 150
435
550 to 730
18
+QT
over 150 to 250
435
520 to 700
18
Transverse direction; usual delivery condition as stated per row.
Source: EN 10028-2:2017, Table 3
Impact energy KV2 (Charpy V-notch)1 row
Condition or thickness
KV2 min at -20 deg C (J)
KV2 min at 0 deg C (J)
KV2 min at +20 deg C (J)
all thicknesses
27
34
40
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 temperature2 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 60
432
415
401
392
385
379
373
364
349
324
over 60 to 250
423
406
392
383
376
371
365
356
341
316
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
1040 to 1100 deg C
Quenching temperature
-
Tempering temperature
730 to 780 deg C
Informative guideline (Annex A).
Source: EN 10028-2:2017, Table A.1
Stress relieving guidance (Pcrit)Pcrit and holding time
Pcrit value
20.5
Stress relieving temperature for 1 h holding
750 deg C
Stress relieving temperature for 2 h holding
735 deg C
Selected pairs of stress relieving temperature and holding time for guidance (Annex B).
Source: EN 10028-2:2017, Table B.1
Active EN 10028-2:2017 X10CrMoVNb9-1 Listings on M-EX (For Sale)