EN 10083-1:1996 30CrNiMo8 Steel: Specifications & Listings
EN 10083-1:1996 30CrNiMo8: A chromium nickel molybdenum alloy steel for quenching and tempering to EN 10083-1:1991 + A1:1996 (steel number 1.6580). Supplied as semi-finished products, bars, rod, wide flats, sheet, plate and strip, and forgings (clause 1.1). 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
0.30-0.60
0.30-0.50
1.80-2.20
<=0.035
<=0.035
<=0.40
Mechanical Properties
Condition
Quenched and tempered, ruling section d <= 16 mm
Elongation
9% min
Hardness
Soft annealed: 248 HB max
Tensile Strength
1250 to 1450 MPa
Yield Strength
1050 MPa min
More data from EN 10083-1:1996
From the standard
Other composition limitsTable 3 and its notes
Designation as printed
30CrNiMo8
Steel number
1.6580
Improved machinability
Steels with lead or higher sulphur, up to about 0.100% S, may be supplied on request (Table 3, note 3)
Elements not quoted in Table 3 are not intentionally added without the purchaser's agreement, other than for finishing the heat. With hardenability requirements, slight deviations within Table 4 are permitted except for carbon, phosphorus and sulphur.
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 3 and its notes
Mechanical properties, quenched and tempered5 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
30
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 average value. Ruling sections as in Annex A. Sizes not listed are not covered by the standard.
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 9
Maximum hardness by delivery conditionTable 8
Treated to improve shearability (+S), max
Not specified
Soft annealed (+A), max
248 HB
Values also apply to the grades with hardenability requirements (+H, +HH, +HL); not applicable to continuously cast slabs not further worked. Where shearability is important, order this steel soft annealed.
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 8
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 at 850 ± 5 deg C (Table 12).
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 5
Restricted hardenability (+HH, +HL), HRCTable 7
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 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 7
Heat treatmentTable 12
Quenching
830 to 860 deg C
Quenching agent
Oil
Tempering
540 to 660 deg C
End quench test
850 ± 5 deg C
Guidance values except the end quench test temperature, which is binding. Lower quenching temperatures generally for water, upper for oil; austenitizing at least 30 min, tempering at least 60 min (guide values).
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 12
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