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BS 970 (Part 1) 805A20 vs SAE J404 8620

Strong Match — 92.6% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 805A20 (BS 970 (Part 1):1991) and SAE J404 8620 (SAE J404:2000) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 805A20 is typically used for case hardening steel (section four), while SAE J404 8620 is commonly used for chemistry-only alloy steel grade; see the composition notes for product scope. BS 970 (Part 1) 805A20 is defined under British Standards (BS), originating from United Kingdom, while SAE J404 8620 is defined under SAE International, originating from United States.

As per chemical composition, BS 970 (Part 1) 805A20 vs SAE J404 8620 is a 92.6% 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 92.6%.

Frequently Compared With BS 970 (Part 1) 805A20:
IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
92.6%
MECHANICAL MATCH
No shared data
OVERALL
92.6%
Specifications
Property BS 970 (Part 1) 805A20 SAE J404 8620
Standard BS 970 (Part 1):1991 SAE J404:2000
Category Alloy Steel Alloy Steel
C (%) 0.18-0.23 0.18-0.23
Mn (%) 0.70-0.90 0.70-0.90
Cr (%) 0.40-0.60 0.40-0.60
Mo (%) 0.15-0.25 0.15-0.25
Ni (%) 0.40-0.70 0.40-0.70
P (%) Not specified <=0.030
S (%) Not specified <=0.040
Si (%) Not specified 0.15-0.35
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) 805A20 SAE J404 8620
Condition Case hardened, 19 mm test bar Not specified
Tensile Strength 850 MPa min Not specified
Elongation 11 % min Not specified
Typical Applications
BS 970 (Part 1) 805A20
Case hardening steel (section four)
SAE J404 8620
Chemistry-only alloy steel grade; see the composition notes for product scope
Key Differences
Can BS 970 (Part 1) 805A20 Be Substituted With SAE J404 8620?
BS 970 (Part 1) 805A20 and SAE J404 8620 overlap closely enough on chemistry and mechanical properties that SAE J404 8620 is often considered as a substitute for BS 970 (Part 1) 805A20 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) 805A20
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SAE J404 8620
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 805A20 and SAE J404 8620?
SAE J404 8620 specifies P, S, Si which are not specified for BS 970 (Part 1) 805A20.
Can BS 970 (Part 1) 805A20 be substituted with SAE J404 8620?
BS 970 (Part 1) 805A20 and SAE J404 8620 overlap closely enough on chemistry and mechanical properties that SAE J404 8620 is often considered as a substitute for BS 970 (Part 1) 805A20 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.