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BS 970 EN35B vs BS 970 (Part 1) 665M23

Close Alternative — 85% match based on chemical composition and mechanical property overlap.

BS 970 EN35B (BS 970:1955) and BS 970 (Part 1) 665M23 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN35B is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 665M23 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN35B vs BS 970 (Part 1) 665M23 is a 85% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 85%.

Frequently Compared With BS 970 EN35B:
IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 11169 (Part 1) 10Ni5Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
85%
MECHANICAL MATCH
No shared data
OVERALL
85%
Specifications
Property BS 970 EN35B BS 970 (Part 1) 665M23
Standard BS 970:1955 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.23-0.28 0.20-0.26
Si (%) 0.10-0.35 Not specified
Mn (%) 0.30-0.60 0.35-0.75
Ni (%) 1.50-2.00 1.50-2.00
Mo (%) 0.20-0.30 0.20-0.30
S (%) <=0.050 <=0.040
P (%) <=0.050 <=0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
BS 970 EN35B
Not documented
BS 970 (Part 1) 665M23
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
Key Differences
Can BS 970 EN35B Be Substituted With BS 970 (Part 1) 665M23?
BS 970 EN35B and BS 970 (Part 1) 665M23 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 665M23 is often considered as a substitute for BS 970 EN35B in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
On M-EX Right Now
BS 970 EN35B
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BS 970 (Part 1) 665M23
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Frequently Asked Questions
What is the difference between BS 970 EN35B and BS 970 (Part 1) 665M23?
BS 970 EN35B specifies Si which is not specified for BS 970 (Part 1) 665M23.
Can BS 970 EN35B be substituted with BS 970 (Part 1) 665M23?
BS 970 EN35B and BS 970 (Part 1) 665M23 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 665M23 is often considered as a substitute for BS 970 EN35B in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.