BS 970 (Part 1):1983 210M15: 210M15 is a case hardening free-cutting carbon manganese steel grade specified in BS 970 Part 1:1983 (Table 11, category 1).
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Mn
S
P
0.12-0.18
0.90-1.30
0.10-0.18
<=0.050
More data from BS 970 (Part 1):1983
From the standard
Other composition limits
Phosphorus and sulphur
P 0.050 max where not otherwise printed (clause 1.7.2.1, carbon and carbon manganese steels)
Residual elements: see clause 1.7.3.
Source: BS 970 (Part 1):1983, clause 1.7.2.1
Mechanical properties, test bar
Test bar diameter (mm)
Rm min (N/mm2)
A min (%)
Izod min (ft lbf)
KCV min (J)
13
490
16
30
35
19 (note 28, preferred size)
460
16
30
35
29
430
18
30
35
Values as printed in Table 11 for the test bar diameter shown. 1 N/mm2 = 1 MPa.
Source: BS 970 (Part 1):1983, Table 11
Heat treatment and maximum hardness
Hardening temperature
900-930 deg C
Table 12 gives no maximum hardness for this steel.
Source: BS 970 (Part 1):1983, Table 12
Comparison with earlier editions
BS 970:1970/72 designation
210M15
BS 970:1955 En No.
32M
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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