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

Strong Match — 93.9% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 805A20 (BS 970 (Part 1):1983) and SAE J404 8620 (SAE J404:2009) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 805A20 is typically used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties)., while SAE J404 8620 is commonly used for case hardened gears, cams, pins, shafts. 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 93.9% 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 93.9%.

Frequently Compared With BS 970 (Part 1) 805A20:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 11169 (Part 1) 10Ni5Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
93.9%
MECHANICAL MATCH
No shared data
OVERALL
93.9%
Specifications
Property BS 970 (Part 1) 805A20 SAE J404 8620
Standard BS 970 (Part 1):1983 SAE J404:2009
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 (%) <=0.035 <=0.030
S (%) <=0.040 <=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.
Typical Applications
BS 970 (Part 1) 805A20
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
SAE J404 8620
Case hardened gears, cams, pins, shafts
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.
Forms & Sizes Available on M-EX
BS 970 (Part 1) 805A20
No active listings currently.
SAE J404 8620
Round Bar → (8 listings)
Diameter: 50–75 mm (1.97–2.95 in)
Length: 5200–7000 mm (204.72–275.59 in)
Flat Bar → (3 listings)
Thickness: 30–30 mm (1.18–1.18 in)
Width: 150–150 mm (5.91–5.91 in)
Length: 3200–3400 mm (125.98–133.86 in)
On M-EX Right Now
BS 970 (Part 1) 805A20
0 active listings and RFQs →
SAE J404 8620
11 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 805A20 and SAE J404 8620?
SAE J404 8620 specifies Si which is 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.