BS 970 (Part 1):1983 216M44: 216M44 is a carbon manganese free-cutting steel grade specified in BS 970 Part 1:1983 (Table 6, category 1). Section three of the standard advises that category 1 steels be used for new designs and established designs whenever possible.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Mn
Si
P
S
0.40-0.48
1.20-1.50
<=0.25
<=0.060
0.12-0.20
More data from BS 970 (Part 1):1983
From the standard
Heat treatment and maximum hardness (through hardening)
Hardening temperature
830-860 deg C
Quenching medium
Oil
Tempering temperature
550-660 deg C
Hardenability test
No hardenability data specified
Softened condition
Not usually supplied in the softened condition
Heat treatment to be given to test bars and to material required in the finally heat treated condition. Note 24: O = oil, W = water. Where oil hardening is specified, either a well-agitated conventional oil or a proven synthetic quenchant may be used. Synthetic quenchants shall not be used for the heat treatment of test bars for material not supplied in the finally heat treated condition.
Source: BS 970 (Part 1):1983, Table 7
Mechanical properties by heat treatment condition
Condition
Limiting ruling section (mm)
Rm (N/mm2)
Re min (N/mm2)
A min (%)
Izod min (ft lbf)
KCV min (J)
Rp0.2 min (N/mm2), when specifically ordered
HB
Q
150
625-775
400
16
20
22
370
179-229
R
100
700-850
450
15
15
16
415
201-255
S
29
775-925
525
14
15
16
495
223-277
T (note 13)
13
850-1000
600
12
15
16
585
248-302
Values as printed in Table 6 for the limiting ruling section shown. Rp0.2 applies when specifically ordered (note 10). 1 N/mm2 = 1 MPa. Note 13: may not always be obtained by bulk heat treatment, but the properties can be achieved by the appropriate heat treatment of die forgings and components, and also apply to test bars.
Source: BS 970 (Part 1):1983, Table 6
Comparison with earlier editions
BS 970:1970/72 designation
Not listed
BS 970:1955 En No.
None
Appendix D note 47: where a comparison is made the steels are not necessarily equivalent. 'Not listed' means the earlier edition has no entry under this designation.
Source: BS 970 (Part 1):1983, Appendix D
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