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BS 970 (Part 1) 905M39 vs EN 10085 41CrAlMo7

Strong Match — 91% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 905M39 (BS 970 (Part 1):1983) and EN 10085 41CrAlMo7 (EN 10085:2001) are both steel grades. Both fall under the Alloy Steel category. BS 970 (Part 1) 905M39 is typically used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6., while EN 10085 41CrAlMo7 is commonly used for nitrided precision components, crankshafts, gears. BS 970 (Part 1) 905M39 is defined under British Standards (BS), originating from United Kingdom, while EN 10085 41CrAlMo7 is defined under European Standard (EN), originating from Europe.

As per chemical composition, BS 970 (Part 1) 905M39 vs EN 10085 41CrAlMo7 is a 91% 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%.

Frequently Compared With BS 970 (Part 1) 905M39:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 105Cr5
Match Breakdown
CHEMISTRY MATCH
91%
MECHANICAL MATCH
No shared data
OVERALL
91%
Specifications
Property BS 970 (Part 1) 905M39 EN 10085 41CrAlMo7
Standard BS 970 (Part 1):1983 EN 10085:2001
Category Alloy Steel Alloy Steel
C (%) 0.35-0.43 0.38–0.45
Mn (%) 0.40-0.65 0.40–0.70
P (%) <=0.025 Not specified
S (%) <=0.025 Not specified
Cr (%) 1.40-1.80 1.40–1.80
Mo (%) 0.15-0.25 0.15–0.25
Al (%) 0.90-1.30 0.85–1.20
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) 905M39 EN 10085 41CrAlMo7
Tensile Strength Not specified 850–1000 MPa
Surface Hardness HV Not specified ≥900 (nitrided)
Core Hardness HB Not specified 248–302
Typical Applications
BS 970 (Part 1) 905M39
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
EN 10085 41CrAlMo7
Nitrided precision components, crankshafts, gears
Key Differences
Can BS 970 (Part 1) 905M39 Be Substituted With EN 10085 41CrAlMo7?
BS 970 (Part 1) 905M39 and EN 10085 41CrAlMo7 overlap closely enough on chemistry and mechanical properties that EN 10085 41CrAlMo7 is often considered as a substitute for BS 970 (Part 1) 905M39 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) 905M39
No active listings currently.
EN 10085 41CrAlMo7
Round Bar → (4 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6300–6500 mm (248.03–255.91 in)
On M-EX Right Now
BS 970 (Part 1) 905M39
0 active listings and RFQs →
EN 10085 41CrAlMo7
4 active listings and RFQs →
Frequently Asked Questions
What is the difference between BS 970 (Part 1) 905M39 and EN 10085 41CrAlMo7?
BS 970 (Part 1) 905M39 specifies P, S which are not specified for EN 10085 41CrAlMo7.
Can BS 970 (Part 1) 905M39 be substituted with EN 10085 41CrAlMo7?
BS 970 (Part 1) 905M39 and EN 10085 41CrAlMo7 overlap closely enough on chemistry and mechanical properties that EN 10085 41CrAlMo7 is often considered as a substitute for BS 970 (Part 1) 905M39 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.