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BS 970 (Part 1) 635M15 vs BS 970 (Part 1) 637M17

Close Alternative — 83.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 635M15 (BS 970 (Part 1):1991) and BS 970 (Part 1) 637M17 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 635M15 is typically used for case hardening steel (section four), while BS 970 (Part 1) 637M17 is commonly used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties).. BS 970 (Part 1) 635M15 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 637M17 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 635M15 vs BS 970 (Part 1) 637M17 is a 83.9% 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 83.9%.

Frequently Compared With BS 970 (Part 1) 635M15:
IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Mo6H IS 11169 (Part 1) 10Ni5Cr4
Match Breakdown
CHEMISTRY MATCH
83.9%
MECHANICAL MATCH
No shared data
OVERALL
83.9%
Specifications
Property BS 970 (Part 1) 635M15 BS 970 (Part 1) 637M17
Standard BS 970 (Part 1):1991 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.12-0.18 0.14-0.20
Mn (%) 0.60-0.90 0.60-0.90
Cr (%) 0.40-0.80 0.60-1.00
Ni (%) 0.70-1.10 0.85-1.25
P (%) Not specified <=0.035
S (%) Not specified <=0.040
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) 635M15 BS 970 (Part 1) 637M17
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) 635M15
Case hardening steel (section four)
BS 970 (Part 1) 637M17
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
Key Differences
Can BS 970 (Part 1) 635M15 Be Substituted With BS 970 (Part 1) 637M17?
BS 970 (Part 1) 635M15 and BS 970 (Part 1) 637M17 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.
On M-EX Right Now
BS 970 (Part 1) 635M15
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BS 970 (Part 1) 637M17
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 635M15 and BS 970 (Part 1) 637M17?
BS 970 (Part 1) 637M17 specifies P, S which are not specified for BS 970 (Part 1) 635M15.
Can BS 970 (Part 1) 635M15 be substituted with BS 970 (Part 1) 637M17?
BS 970 (Part 1) 635M15 and BS 970 (Part 1) 637M17 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.