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BS 970 (Part 1) 637A16 vs BS 970 (Part 1) 808M17

Close Alternative — 80.3% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 637A16 (BS 970 (Part 1):1991) and BS 970 (Part 1) 808M17 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 637A16 is typically used for case hardening steel (section four), while BS 970 (Part 1) 808M17 is commonly used for case hardening steel (section four). BS 970 (Part 1) 637A16 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 808M17 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 637A16 vs BS 970 (Part 1) 808M17 is a 70.4% match. As per mechanical properties, the match is 100%. Combined, this makes them a close alternative overall at 80.3%.

Frequently Compared With BS 970 (Part 1) 637A16:
IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
70.4%
MECHANICAL MATCH
100%
OVERALL
80.3%
Specifications
Property BS 970 (Part 1) 637A16 BS 970 (Part 1) 808M17
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 0.70-1.05
Cr (%) 0.70-1.00 0.35-0.65
Mo (%) <=0.10 0.30-0.40
Ni (%) 0.90-1.20 0.35-0.75
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) 637A16 BS 970 (Part 1) 808M17
Condition Case hardened, 19 mm test bar Case hardened, 19 mm test bar
Tensile Strength 930 MPa min 930 MPa min
Elongation 10 % min 10 % min
Typical Applications
BS 970 (Part 1) 637A16
Case hardening steel (section four)
BS 970 (Part 1) 808M17
Case hardening steel (section four)
Can BS 970 (Part 1) 637A16 Be Substituted With BS 970 (Part 1) 808M17?
BS 970 (Part 1) 637A16 and BS 970 (Part 1) 808M17 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 (Part 1) 637A16
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BS 970 (Part 1) 808M17
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 637A16 and BS 970 (Part 1) 808M17?
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) 637A16 be substituted with BS 970 (Part 1) 808M17?
BS 970 (Part 1) 637A16 and BS 970 (Part 1) 808M17 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.