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BS 970 (Part 1) 708M20 vs BS 970 (Part 1) 708A30

Close Alternative — 81.8% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 708M20 (BS 970 (Part 1):1991) and BS 970 (Part 1) 708A30 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 708M20 is typically used for case hardening steel (section four), while BS 970 (Part 1) 708A30 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. BS 970 (Part 1) 708M20 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 708A30 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 708M20 vs BS 970 (Part 1) 708A30 is a 81.8% 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 81.8%.

Frequently Compared With BS 970 (Part 1) 708M20:
IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
81.8%
MECHANICAL MATCH
No shared data
OVERALL
81.8%
Specifications
Property BS 970 (Part 1) 708M20 BS 970 (Part 1) 708A30
Standard BS 970 (Part 1):1991 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.28-0.33
Mn (%) 0.60-0.90 0.40-0.60
Cr (%) 0.85-1.15 0.90-1.20
Mo (%) 0.15-0.25 0.15-0.25
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) 708M20 BS 970 (Part 1) 708A30
Condition Case hardened, 19 mm test bar Not specified
Tensile Strength 930 MPa min Not specified
Elongation 10 % min Not specified
Typical Applications
BS 970 (Part 1) 708M20
Case hardening steel (section four)
BS 970 (Part 1) 708A30
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can BS 970 (Part 1) 708M20 Be Substituted With BS 970 (Part 1) 708A30?
BS 970 (Part 1) 708M20 and BS 970 (Part 1) 708A30 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) 708M20
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BS 970 (Part 1) 708A30
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 708M20 and BS 970 (Part 1) 708A30?
BS 970 (Part 1) 708A30 specifies P, S which are not specified for BS 970 (Part 1) 708M20.
Can BS 970 (Part 1) 708M20 be substituted with BS 970 (Part 1) 708A30?
BS 970 (Part 1) 708M20 and BS 970 (Part 1) 708A30 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.