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BS 970 (Part 1) 527A17 vs BS 970 (Part 1) 527M17

Strong Match — 95.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 527A17 (BS 970 (Part 1):1991) and BS 970 (Part 1) 527M17 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 527A17 is typically used for case hardening steel (section four), while BS 970 (Part 1) 527M17 is commonly used for case hardening steel (section four). BS 970 (Part 1) 527A17 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 527M17 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 527A17 vs BS 970 (Part 1) 527M17 is a 93.8% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 95.9%.

Frequently Compared With BS 970 (Part 1) 527A17:
NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
93.8%
MECHANICAL MATCH
100%
OVERALL
95.9%
Specifications
Property BS 970 (Part 1) 527A17 BS 970 (Part 1) 527M17
Standard BS 970 (Part 1):1991 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.14-0.19 0.14-0.20
Mn (%) 0.70-0.90 0.70-1.00
Cr (%) 0.70-0.90 0.60-0.90
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) 527A17 BS 970 (Part 1) 527M17
Condition Case hardened, 19 mm test bar Case hardened, 19 mm test bar
Tensile Strength 770 MPa min 770 MPa min
Elongation 12 % min 12 % min
Typical Applications
BS 970 (Part 1) 527A17
Case hardening steel (section four)
BS 970 (Part 1) 527M17
Case hardening steel (section four)
Can BS 970 (Part 1) 527A17 Be Substituted With BS 970 (Part 1) 527M17?
BS 970 (Part 1) 527A17 and BS 970 (Part 1) 527M17 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 527M17 is often considered as a substitute for BS 970 (Part 1) 527A17 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) 527A17
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BS 970 (Part 1) 527M17
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 527A17 and BS 970 (Part 1) 527M17?
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) 527A17 be substituted with BS 970 (Part 1) 527M17?
BS 970 (Part 1) 527A17 and BS 970 (Part 1) 527M17 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 527M17 is often considered as a substitute for BS 970 (Part 1) 527A17 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.