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BS 970 (Part 1) 665M17 vs BS 970 (Part 1) 665H23

Strong Match — 91.4% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 665M17 (BS 970 (Part 1):1991) and BS 970 (Part 1) 665H23 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 665M17 is typically used for case hardening steel (section four), while BS 970 (Part 1) 665H23 is commonly used for case hardening steel (section four). BS 970 (Part 1) 665M17 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 665H23 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 665M17 vs BS 970 (Part 1) 665H23 is a 91.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 91.4%.

Frequently Compared With BS 970 (Part 1) 665M17:
IS 1570 (Part 7) 10Mo6H UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10 IS 11169 (Part 1) 10Ni5Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
91.4%
MECHANICAL MATCH
No shared data
OVERALL
91.4%
Specifications
Property BS 970 (Part 1) 665M17 BS 970 (Part 1) 665H23
Standard BS 970 (Part 1):1991 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.14-0.20 0.20-0.26
Mn (%) 0.35-0.75 0.35-0.75
Mo (%) 0.20-0.30 0.20-0.30
Ni (%) 1.50-2.00 1.50-2.00
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 (Part 1) 665M17 BS 970 (Part 1) 665H23
Condition Case hardened, 19 mm test bar Not specified
Tensile Strength 770 MPa min Not specified
Elongation 12 % min Not specified
Typical Applications
BS 970 (Part 1) 665M17
Case hardening steel (section four)
BS 970 (Part 1) 665H23
Case hardening steel (section four)
Can BS 970 (Part 1) 665M17 Be Substituted With BS 970 (Part 1) 665H23?
BS 970 (Part 1) 665M17 and BS 970 (Part 1) 665H23 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 665H23 is often considered as a substitute for BS 970 (Part 1) 665M17 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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BS 970 (Part 1) 665M17
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BS 970 (Part 1) 665H23
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 665M17 and BS 970 (Part 1) 665H23?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 665M17 be substituted with BS 970 (Part 1) 665H23?
BS 970 (Part 1) 665M17 and BS 970 (Part 1) 665H23 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 665H23 is often considered as a substitute for BS 970 (Part 1) 665M17 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.