Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; case hardening steel, carbon and carbon manganese (Table 14)
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Si
Mn
P
S
0.08-0.13
0.10-0.40
0.30-0.60
<=0.05
<=0.05
More data from BS 970 (Part 3):1991
From the standard
Other composition limits
Steel group
Case hardening steel, carbon and carbon manganese (Table 14)
Condition of supply
Bright bars: cold drawn, turned or precision ground, in straight lengths
Maximum unless a range is stated.
Source: BS 970 (Part 3):1991, Table 14
Core properties by test bar diameter (blank carburized)
Test bar diameter (mm)
Tensile strength Rm, min (MPa)
Elongation, min (%)
Impact Izod, min (J)
Impact KCV, min (J)
19 (preferred size)
430
18
47
42
Mechanical tests are in the blank carburized condition (clause 7.3.3). The 19 mm test piece is to be used unless otherwise agreed (clause 10.4). See also option A.3.
Source: BS 970 (Part 3):1991, Table 22
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