EN 10083-3:2006 39NiCrMo3 Steel: Specifications & Listings
EN 10083-3:2006 39NiCrMo3: A nickel chromium molybdenum alloy steel for quenching and tempering to EN 10083-3:2006 (steel number 1.6510). Supplied as semi-finished products, bars, rod, wide flats, hot rolled strip, sheet and plate, and forgings. Quenched and tempered tensile strength 980 to 1180 MPa for ruling sections up to 16 mm.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Cr
Mn
Mo
Ni
P
S
Si
0.35-0.43
0.60-1.00
0.50-0.80
0.15-0.25
0.70-1.00
<=0.025
<=0.035
<=0.40
Mechanical Properties
Condition
Quenched and tempered (+QT), ruling section d <= 16 mm
Elongation
11% min
Hardness
Soft annealed (+A): 240 HBW max
Tensile Strength
980 to 1180 MPa
Yield Strength
785 MPa min
More data from EN 10083-3:2006
From the standard
Other composition limitsTable 3 and its notes
Steel number
1.6510
Steel class
Alloy special steel (clause 4.1)
Deoxidation
Killed
Improved machinability
Sulphur up to about 0.10 may be supplied on request; the manganese upper limit may then rise by 0.15 (Table 3, footnote c)
Elements not quoted in Table 3 are not intentionally added without the purchaser's agreement, other than for finishing the heat. With hardenability or quenched and tempered property requirements, slight deviations within Table 4 are permitted except for carbon, phosphorus and sulphur.
Source: EN 10083-3:2006, Table 3 and its notes
Mechanical properties, quenched and tempered (+QT)5 sections
Ruling section
Yield strength Re, min (MPa)
Tensile strength Rm (MPa)
Elongation A, min (%)
Reduction of area Z, min (%)
Impact KV, min (J)
d <= 16 mm, t <= 8 mm
785
980 to 1180
11
40
-
16 mm < d <= 40 mm, 8 mm < t <= 20 mm
735
930 to 1130
11
40
35
40 mm < d <= 100 mm, 20 mm < t <= 60 mm
685
880 to 1080
12
45
40
100 mm < d <= 160 mm, 60 mm < t <= 100 mm
635
830 to 980
12
50
40
160 mm < d <= 250 mm, 100 mm < t <= 160 mm
540
740 to 880
13
50
40
Re is the upper yield strength or, if no yield phenomenon occurs, the 0.2% proof strength; A on gauge length 5.65 times the root of the original cross section; KV on longitudinal Charpy V-notch test pieces, average of 3 values, no single value below 70% of the minimum. Ruling sections as in EN 10083-1:2006, Annex A. Sizes not listed are not covered by the standard.
Source: EN 10083-3:2006, Table 8
Maximum hardness by delivery conditionTable 7
Treated to improve shearability (+S), max
Not specified
Soft annealed (+A), max
240 HBW
Values also apply to the grades with hardenability requirements (+H, +HH, +HL); not applicable to continuously cast slabs not further deformed. Where shearability is important, order this steel soft annealed.
Source: EN 10083-3:2006, Table 7
Hardenability, end quench test (+H)Hardness band
Hardness band (HRC, minimum to maximum) by distance from the quenched end (mm)
1.5
3
5
7
9
11
13
15
20
25
30
35
40
45
50
Distance from quenched end (mm)
1.5
3
5
7
9
11
13
15
20
25
30
35
40
45
50
Maximum, HRC
60
60
59
58
58
57
57
56
55
52
51
49
48
46
45
Minimum, HRC
52
51
50
49
48
46
44
43
39
36
34
33
32
31
30
Applies when ordered with the symbol +H. End quench test to EN ISO 642, quenching from 850 ± 5 deg C (Table 11).
Source: EN 10083-3:2006, Table 5
Restricted hardenability (+HH, +HL), HRCTable 6
Limit
1.5 mm
3 mm
5 mm
7 mm
9 mm
11 mm
13 mm
15 mm
20 mm
25 mm
30 mm
35 mm
40 mm
45 mm
50 mm
+HH max.
60
60
59
58
58
57
57
56
55
52
51
49
48
46
45
+HH min.
55
54
53
52
51
50
48
47
44
41
40
38
37
36
35
+HL max.
57
57
56
55
55
53
53
52
50
47
45
44
43
41
40
+HL min.
52
51
50
49
48
46
44
43
39
36
34
33
32
31
30
Restricted scatter bands by distance from the quenched end.
Source: EN 10083-3:2006, Table 6
Heat treatmentTable 11
Quenching
830 to 850 deg C
Quenching agent
Oil or water
Tempering
550 to 650 deg C
End quench test
850 ± 5 deg C
Guidance values except the end quench test temperature, which is mandatory. Lower quenching temperatures generally for water, upper for oil; austenitizing at least 30 min, tempering at least 60 min (guide values).
Source: EN 10083-3:2006, Table 11
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