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AISI 8620 vs BS 970 (Part 1) 805A20

Strong Match — 94.3% match based on chemical composition and mechanical property overlap.

AISI 8620 and BS 970 (Part 1) 805A20 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. AISI 8620 is typically used for used for gears, shafts, sprockets, pinions, bushings, and transmission components., while BS 970 (Part 1) 805A20 is commonly used for case hardening steel for mechanical and allied engineering purposes (table 11 mechanical properties).. AISI 8620 is defined under AISI, originating from United States, while BS 970 (Part 1) 805A20 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, AISI 8620 vs BS 970 (Part 1) 805A20 is a 94.3% 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 94.3%.

Frequently Compared With AISI 8620:
NF A35-565 100C6 UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6
Match Breakdown
CHEMISTRY MATCH
94.3%
MECHANICAL MATCH
No shared data
OVERALL
94.3%
Specifications
Property AISI 8620 BS 970 (Part 1) 805A20
Standard AISI BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.18-0.23 0.18-0.23
Mn (%) 0.70-0.90 0.70-0.90
Si (%) 0.15-0.35 Not specified
Ni (%) 0.40-0.70 0.40-0.70
Cr (%) 0.40-0.60 0.40-0.60
Mo (%) 0.15-0.25 0.15-0.25
P (%) 0.035 max <=0.035
S (%) 0.040 max <=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 AISI 8620 BS 970 (Part 1) 805A20
Tensile Strength 750-980 MPa Not specified
Yield Strength 550-780 MPa Not specified
Elongation 12-18% Not specified
Hardness 200-280 HB Not specified
Typical Applications
AISI 8620
Used for gears, shafts, sprockets, pinions, bushings, and transmission components.
BS 970 (Part 1) 805A20
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
Key Differences
Can AISI 8620 Be Substituted With BS 970 (Part 1) 805A20?
AISI 8620 and BS 970 (Part 1) 805A20 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 805A20 is often considered as a substitute for AISI 8620 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
AISI 8620
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6600–6900 mm (259.84–271.65 in)
BS 970 (Part 1) 805A20
No active listings currently.
On M-EX Right Now
AISI 8620
2 active listings and RFQs →
BS 970 (Part 1) 805A20
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between AISI 8620 and BS 970 (Part 1) 805A20?
AISI 8620 specifies Si which is not specified for BS 970 (Part 1) 805A20.
Can AISI 8620 be substituted with BS 970 (Part 1) 805A20?
AISI 8620 and BS 970 (Part 1) 805A20 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 805A20 is often considered as a substitute for AISI 8620 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.