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

Strong Match — 91.9% match based on chemical composition and mechanical property overlap.

EN 10085 41CrAlMo7 (EN 10085:2001) and BS 970 (Part 1) 905M39 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. EN 10085 41CrAlMo7 is typically used for nitrided precision components, crankshafts, gears, while BS 970 (Part 1) 905M39 is commonly used for steel for surface hardening by nitriding (section three). EN 10085 41CrAlMo7 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 1) 905M39 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, EN 10085 41CrAlMo7 vs BS 970 (Part 1) 905M39 is a 91.9% 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 91.9%.

Frequently Compared With EN 10085 41CrAlMo7:
GOST 4543 12HN3A NF A35-565 100C6 UNI 11234 100Cr6 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
91.9%
MECHANICAL MATCH
No shared data
OVERALL
91.9%
Specifications
Property EN 10085 41CrAlMo7 BS 970 (Part 1) 905M39
Standard EN 10085:2001 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.38–0.45 0.35-0.43
Mn (%) 0.40–0.70 0.40-0.65
Cr (%) 1.40–1.80 1.40-1.80
Mo (%) 0.15–0.25 0.15-0.25
Al (%) 0.85–1.20 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 EN 10085 41CrAlMo7 BS 970 (Part 1) 905M39
Tensile Strength 850–1000 MPa Not specified
Surface Hardness HV ≥900 (nitrided) Not specified
Core Hardness HB 248–302 Not specified
Typical Applications
EN 10085 41CrAlMo7
Nitrided precision components, crankshafts, gears
BS 970 (Part 1) 905M39
Steel for surface hardening by nitriding (section three)
Key Differences
Can EN 10085 41CrAlMo7 Be Substituted With BS 970 (Part 1) 905M39?
EN 10085 41CrAlMo7 and BS 970 (Part 1) 905M39 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 905M39 is often considered as a substitute for EN 10085 41CrAlMo7 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
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)
BS 970 (Part 1) 905M39
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On M-EX Right Now
EN 10085 41CrAlMo7
4 active listings and RFQs →
BS 970 (Part 1) 905M39
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Frequently Asked Questions
What is the difference between EN 10085 41CrAlMo7 and BS 970 (Part 1) 905M39?
EN 10085 41CrAlMo7 specifies Al which is not specified for BS 970 (Part 1) 905M39.
Can EN 10085 41CrAlMo7 be substituted with BS 970 (Part 1) 905M39?
EN 10085 41CrAlMo7 and BS 970 (Part 1) 905M39 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 905M39 is often considered as a substitute for EN 10085 41CrAlMo7 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.