Post Stock Login Register

BS 970 (Part 1) 805A20 vs AISI 8620

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

BS 970 (Part 1) 805A20 (BS 970 (Part 1):1983) and AISI 8620 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 AISI 8620 is commonly used for used for gears, shafts, sprockets, pinions, bushings, and transmission components.. BS 970 (Part 1) 805A20 is defined under British Standards (BS), originating from United Kingdom, while AISI 8620 is defined under AISI, originating from United States.

As per chemical composition, BS 970 (Part 1) 805A20 vs AISI 8620 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 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 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 IS 11169 (Part 1) 10Ni5Cr4
Match Breakdown
CHEMISTRY MATCH
94.3%
MECHANICAL MATCH
No shared data
OVERALL
94.3%
Specifications
Property BS 970 (Part 1) 805A20 AISI 8620
Standard BS 970 (Part 1):1983 AISI
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 0.035 max
S (%) <=0.040 0.040 max
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 AISI 8620
Tensile Strength Not specified 750-980 MPa
Yield Strength Not specified 550-780 MPa
Elongation Not specified 12-18%
Hardness Not specified 200-280 HB
Typical Applications
BS 970 (Part 1) 805A20
Case hardening steel for mechanical and allied engineering purposes (Table 11 mechanical properties).
AISI 8620
Used for gears, shafts, sprockets, pinions, bushings, and transmission components.
Key Differences
Can BS 970 (Part 1) 805A20 Be Substituted With AISI 8620?
BS 970 (Part 1) 805A20 and AISI 8620 overlap closely enough on chemistry and mechanical properties that AISI 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.
AISI 8620
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6600–6900 mm (259.84–271.65 in)
On M-EX Right Now
BS 970 (Part 1) 805A20
0 active listings and RFQs →
AISI 8620
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 805A20 and AISI 8620?
AISI 8620 specifies Si which is not specified for BS 970 (Part 1) 805A20.
Can BS 970 (Part 1) 805A20 be substituted with AISI 8620?
BS 970 (Part 1) 805A20 and AISI 8620 overlap closely enough on chemistry and mechanical properties that AISI 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.