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BS 970 (Part 1) 805H17 vs BS 970 (Part 1) 805M20

Strong Match — 92.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 805H17 (BS 970 (Part 1):1983) and BS 970 (Part 1) 805M20 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 805H17 is typically used for case hardening steel supplied to specified hardenability limits (end quench test, table 10)., while BS 970 (Part 1) 805M20 is commonly used for case hardening steel (section four). BS 970 (Part 1) 805H17 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 805M20 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 805H17 vs BS 970 (Part 1) 805M20 is a 92.9% 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 92.9%.

Frequently Compared With BS 970 (Part 1) 805H17:
IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 4367 10Cr9Mo10 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
92.9%
MECHANICAL MATCH
No shared data
OVERALL
92.9%
Specifications
Property BS 970 (Part 1) 805H17 BS 970 (Part 1) 805M20
Standard BS 970 (Part 1):1983 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.14-0.20 0.17-0.23
Mn (%) 0.60-0.95 0.60-0.95
Cr (%) 0.35-0.65 0.35-0.65
Mo (%) 0.15-0.25 0.15-0.25
Ni (%) 0.35-0.75 0.35-0.75
P (%) <=0.035 Not specified
S (%) <=0.040 Not specified
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) 805H17 BS 970 (Part 1) 805M20
Condition Not specified Case hardened, 19 mm test bar
Tensile Strength Not specified 850 MPa min
Elongation Not specified 11 % min
Typical Applications
BS 970 (Part 1) 805H17
Case hardening steel supplied to specified hardenability limits (end quench test, Table 10).
BS 970 (Part 1) 805M20
Case hardening steel (section four)
Key Differences
Can BS 970 (Part 1) 805H17 Be Substituted With BS 970 (Part 1) 805M20?
BS 970 (Part 1) 805H17 and BS 970 (Part 1) 805M20 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 805M20 is often considered as a substitute for BS 970 (Part 1) 805H17 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) 805H17
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BS 970 (Part 1) 805M20
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 805H17 and BS 970 (Part 1) 805M20?
BS 970 (Part 1) 805H17 specifies P, S which are not specified for BS 970 (Part 1) 805M20.
Can BS 970 (Part 1) 805H17 be substituted with BS 970 (Part 1) 805M20?
BS 970 (Part 1) 805H17 and BS 970 (Part 1) 805M20 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 805M20 is often considered as a substitute for BS 970 (Part 1) 805H17 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.