EN 10083-1:1996 28Mn6 Steel: Specifications & Listings
EN 10083-1:1996 28Mn6: A manganese steel for quenching and tempering to EN 10083-1:1991 + A1:1996 (steel number 1.1170). Supplied as semi-finished products, bars, rod, wide flats, sheet, plate and strip, and forgings (clause 1.1). Quenched and tempered tensile strength 800 to 950 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
Cr+Mo+Ni
Mn
Mo
Ni
P
S
Si
0.25-0.32
<=0.40
<=0.63
1.30-1.65
<=0.10
<=0.40
<=0.035
<=0.035
<=0.40
Mechanical Properties
Condition
Quenched and tempered, ruling section d <= 16 mm
Elongation
13% min
Hardness
Soft annealed: 223 HB max
Tensile Strength
800 to 950 MPa
Yield Strength
590 MPa min
More data from EN 10083-1:1996
From the standard
Other composition limitsTable 3 and its notes
Designation as printed
28Mn6
Steel number
1.1170
Improved machinability
Steels with lead or higher sulphur, up to about 0.100% S, may be supplied on request (Table 3, note 3)
Restricted options
Without hardenability or quenched and tempered or normalized property requirements, the carbon range may be restricted to 0.05% and/or the sum Cr + Mo + Ni to max. 0.45% by agreement (Table 3, note 5)
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 tempered3 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
590
800 to 950
13
40
35
16 mm < d <= 40 mm, 8 mm < t <= 20 mm
490
700 to 850
15
45
40
40 mm < d <= 100 mm, 20 mm < t <= 60 mm
440
650 to 800
16
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 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
Mechanical properties, normalized3 sizes
Size
Yield strength Re, min (MPa)
Tensile strength Rm, min (MPa)
Elongation A, min (%)
d <= 16 mm, t <= 16 mm
345
630
17
16 mm < d <= 100 mm, 16 mm < t <= 100 mm
310
600
18
100 mm < d <= 250 mm, 100 mm < t <= 150 mm
290
590
18
Values also apply to the grades with hardenability requirements (+H, +HH, +HL). Sizes not listed are not covered by the standard.
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 10
Maximum hardness by delivery conditionTable 8
Treated to improve shearability (+S), max
255 HB
Soft annealed (+A), max
223 HB
Values also apply to the grades with hardenability requirements (+H, +HH, +HL); not applicable to continuously cast slabs not further worked.
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
54
53
51
48
44
41
38
35
31
29
27
26
25
25
24
Minimum, HRC
45
42
37
27
21
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.
54
53
51
48
44
41
38
35
31
29
27
26
25
25
24
HH min.
48
46
42
34
30
27
24
21
-
-
-
-
-
-
-
HL max.
51
49
46
41
35
32
29
26
22
20
-
-
-
-
-
HL min.
45
42
37
27
21
-
-
-
-
-
-
-
-
-
-
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 870 deg C
Quenching agent
Water or oil
Tempering
540 to 680 deg C
End quench test
850 ± 5 deg C
Normalizing
850 to 890 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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