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BS 970 EN100D vs BS 970 EN100B

Close Alternative — 84.9% match based on chemical composition and mechanical property overlap.

BS 970 EN100D (BS 970:1955) and BS 970 EN100B (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN100D is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN100B is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN100D vs BS 970 EN100B is a 91.4% match. As per mechanical properties, the match is 100%. Combined, this makes them a close alternative overall at 84.9%.

Frequently Compared With BS 970 EN100D:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
91.4%
MECHANICAL MATCH
100%
OVERALL
84.9%
Specifications
Property BS 970 EN100D BS 970 EN100B
Standard BS 970:1955 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.40-0.45 0.30-0.35
Si (%) 0.10-0.50 0.10-0.50
Mn (%) 1.20-1.50 1.20-1.50
Ni (%) 0.50-1.00 0.50-1.00
Cr (%) 0.30-0.60 0.30-0.60
Mo (%) 0.15-0.25 0.15-0.25
S (%) <=0.050 <=0.050
P (%) <=0.050 <=0.050
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 EN100D BS 970 EN100B
Tensile Strength ≥695 MPa (45 tons/sq in, converted) ≥695 MPa (45 tons/sq in, converted)
Yield Strength ≥525 MPa (34 tons/sq in, converted) ≥525 MPa (34 tons/sq in, converted)
Elongation ≥22% ≥22%
Hardness 201-255 HB 201-255 HB
Condition Hardened and tempered R, ruling section 6 in (lowest-strength condition of the standard) Hardened and tempered R, ruling section 6 in (lowest-strength condition of the standard)
Can BS 970 EN100D Be Substituted With BS 970 EN100B?
BS 970 EN100D and BS 970 EN100B are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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BS 970 EN100D
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BS 970 EN100B
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Frequently Asked Questions
What is the difference between BS 970 EN100D and BS 970 EN100B?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN100D be substituted with BS 970 EN100B?
BS 970 EN100D and BS 970 EN100B are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.