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BS 970 (Part 3) 805M20 vs EN 10084 20NiCrMoS2-2

Strong Match — 91.6% match based on chemical composition and mechanical property overlap.

BS 970 (Part 3) 805M20 (BS 970 (Part 3):1991) and EN 10084 20NiCrMoS2-2 (EN 10084:2008) 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 EN 10084 20NiCrMoS2-2 is commonly used for case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1). BS 970 (Part 3) 805M20 is defined under British Standards (BS), originating from United Kingdom, while EN 10084 20NiCrMoS2-2 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 970 (Part 3) 805M20 vs EN 10084 20NiCrMoS2-2 is a 91.6% 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 91.6%.

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 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
91.6%
MECHANICAL MATCH
No shared data
OVERALL
91.6%
Specifications
Property BS 970 (Part 3) 805M20 EN 10084 20NiCrMoS2-2
Standard BS 970 (Part 3):1991 EN 10084:2008
Category Alloy Steel Alloy Steel
C (%) 0.17-0.23 0.17-0.23
Si (%) 0.10-0.40 <=0.40
Mn (%) 0.60-0.95 0.65-0.95
Cr (%) 0.35-0.65 0.35-0.70
Mo (%) 0.15-0.25 0.15-0.25
Ni (%) 0.35-0.75 0.40-0.70
P (%) <=0.04 <=0.025
S (%) <=0.05 0.020-0.040
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 (Part 3) 805M20 EN 10084 20NiCrMoS2-2
Condition Not specified Soft annealed
Hardenability Not specified +H band at 1.5 mm from the quenched end: 41 to 49 HRC
Hardness Not specified Soft annealed: 212 HB max
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)
EN 10084 20NiCrMoS2-2
Case hardened machine parts: carburized or carbonitrided, then hardened (clause 3.1)
Can BS 970 (Part 3) 805M20 Be Substituted With EN 10084 20NiCrMoS2-2?
BS 970 (Part 3) 805M20 and EN 10084 20NiCrMoS2-2 overlap closely enough on chemistry and mechanical properties that EN 10084 20NiCrMoS2-2 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.
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BS 970 (Part 3) 805M20
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EN 10084 20NiCrMoS2-2
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Frequently Asked Questions
What is the difference between BS 970 (Part 3) 805M20 and EN 10084 20NiCrMoS2-2?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 3) 805M20 be substituted with EN 10084 20NiCrMoS2-2?
BS 970 (Part 3) 805M20 and EN 10084 20NiCrMoS2-2 overlap closely enough on chemistry and mechanical properties that EN 10084 20NiCrMoS2-2 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.