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BS 970 (Part 3) 805M20 vs JIS G4103 SNCM220

Strong Match — 90.3% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 805M20 (BS 970 (Part 3):1991) and JIS G4103 SNCM220 (JIS G4103:1979) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 3) 805M20 is typically used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (table 15), while JIS G4103 SNCM220 is commonly used for case hardened gears, cams, shafts. BS 970 (Part 3) 805M20 is defined under British Standards (BS), originating from United Kingdom, while JIS G4103 SNCM220 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, BS 970 (Part 3) 805M20 vs JIS G4103 SNCM220 is a 90.3% 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 90.3%.

Frequently Compared With BS 970 (Part 3) 805M20:
IS 4367 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 4) 10Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
90.3%
MECHANICAL MATCH
No shared data
OVERALL
90.3%
Specifications
Property BS 970 (Part 3) 805M20 JIS G4103 SNCM220
Standard BS 970 (Part 3):1991 JIS G4103:1979
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.17–0.23
Si (%) 0.10-0.40 0.15–0.35
Mn (%) 0.60-0.95 0.60–0.90
Cr (%) 0.35-0.65 0.40–0.65
Mo (%) 0.15-0.25 0.15–0.30
Ni (%) 0.35-0.75 0.40–0.70
P (%) <=0.04 Not specified
S (%) <=0.05 Not specified
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 3) 805M20 JIS G4103 SNCM220
Tensile Strength Not specified ≥830 MPa
Case Hardness HRC Not specified 58–62
Elongation Not specified ≥13%
Typical Applications
BS 970 (Part 3) 805M20
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (Table 15)
JIS G4103 SNCM220
Case hardened gears, cams, shafts
Key Differences
Can BS 970 (Part 3) 805M20 Be Substituted With JIS G4103 SNCM220?
BS 970 (Part 3) 805M20 and JIS G4103 SNCM220 overlap closely enough on chemistry and mechanical properties that JIS G4103 SNCM220 is often considered as a substitute for BS 970 (Part 3) 805M20 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 3) 805M20
No active listings currently.
JIS G4103 SNCM220
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6200–7000 mm (244.09–275.59 in)
On M-EX Right Now
BS 970 (Part 3) 805M20
0 active listings and RFQs →
JIS G4103 SNCM220
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 3) 805M20 and JIS G4103 SNCM220?
BS 970 (Part 3) 805M20 specifies P, S which are not specified for JIS G4103 SNCM220.
Can BS 970 (Part 3) 805M20 be substituted with JIS G4103 SNCM220?
BS 970 (Part 3) 805M20 and JIS G4103 SNCM220 overlap closely enough on chemistry and mechanical properties that JIS G4103 SNCM220 is often considered as a substitute for BS 970 (Part 3) 805M20 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.