EN 10083-3:2006 30CrNiMo8 Steel: Specifications & Listings
EN 10083-3:2006 30CrNiMo8: A nickel chromium molybdenum alloy steel for quenching and tempering to EN 10083-3:2006 (steel number 1.6580). Supplied as semi-finished products, bars, rod, wide flats, hot rolled strip, sheet and plate, and forgings. Quenched and tempered tensile strength 1250 to 1450 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
0.26-0.34
1.80-2.20
0.50-0.80
0.30-0.50
1.80-2.20
<=0.025
<=0.035
<=0.40
Mechanical Properties
Condition
Quenched and tempered (+QT), ruling section d <= 16 mm
Elongation
9% min
Hardness
Soft annealed (+A): 248 HBW max
Tensile Strength
1250 to 1450 MPa
Yield Strength
1050 MPa min
Typical Available Sizes
Round Bar
50mm–600mm dia
Sizes are indicative. Contact seller for exact availability.
More data from EN 10083-3:2006
From the standard
Other composition limitsTable 3 and its notes
Steel number
1.6580
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
1050
1250 to 1450
9
40
-
16 mm < d <= 40 mm, 8 mm < t <= 20 mm
1050
1250 to 1450
9
40
30
40 mm < d <= 100 mm, 20 mm < t <= 60 mm
900
1100 to 1300
10
45
35
100 mm < d <= 160 mm, 60 mm < t <= 100 mm
800
1000 to 1200
11
50
45
160 mm < d <= 250 mm, 100 mm < t <= 160 mm
700
900 to 1100
12
50
45
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. Tensile strength for 40 mm < d <= 100 mm as corrected by EN 10083-3:2006/AC:2008 (printed 1000 to 1300 MPa in the original edition).
Source: EN 10083-3:2006, Table 8 with AC:2008
Maximum hardness by delivery conditionTable 7
Treated to improve shearability (+S), max
Not specified
Soft annealed (+A), max
248 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
56
56
56
56
55
55
55
55
55
54
54
54
54
54
54
Minimum, HRC
48
48
48
48
47
47
47
46
46
45
45
44
44
43
43
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.
56
56
56
56
55
55
55
55
55
54
54
54
54
54
54
+HH min.
51
51
51
51
50
50
50
49
49
48
48
47
47
47
47
+HL max.
53
53
53
53
52
52
52
52
52
51
51
51
51
50
50
+HL min.
48
48
48
48
47
47
47
46
46
45
45
44
44
43
43
Restricted scatter bands by distance from the quenched end.
Source: EN 10083-3:2006, Table 6
Heat treatmentTable 11
Quenching
830 to 860 deg C
Quenching agent
Oil or water
Tempering
540 to 660 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).