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DIN 17211 41CrAlMo7-4 vs BS 970 (Part 1) 905M39

Strong Match — 85.2% match based on chemical composition and mechanical property overlap.

DIN 17211 41CrAlMo7-4 (DIN 17211:1987) and BS 970 (Part 1) 905M39 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. DIN 17211 41CrAlMo7-4 is typically used for used for nitrided shafts, gears, crankshafts, spindles, extrusion screws, and wear-resistant machine components., while BS 970 (Part 1) 905M39 is commonly used for steel for surface hardening by nitriding (section three). DIN 17211 41CrAlMo7-4 is defined under Deutsches Institut fur Normung (DIN), originating from Germany, while BS 970 (Part 1) 905M39 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, DIN 17211 41CrAlMo7-4 vs BS 970 (Part 1) 905M39 is a 85.2% 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 85.2%.

Frequently Compared With DIN 17211 41CrAlMo7-4:
NF A35-565 100C6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
85.2%
MECHANICAL MATCH
No shared data
OVERALL
85.2%
Specifications
Property DIN 17211 41CrAlMo7-4 BS 970 (Part 1) 905M39
Standard DIN 17211:1987 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.38–0.48 0.35-0.43
Mn (%) 0.40–0.70 0.40-0.65
Cr (%) 1.40–1.80 1.40-1.80
Mo (%) 0.20–0.30 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 DIN 17211 41CrAlMo7-4 BS 970 (Part 1) 905M39
Tensile Strength 900–1050 MPa Not specified
Surface Hardness HV ≥950 (nitrided) Not specified
Typical Applications
DIN 17211 41CrAlMo7-4
Used for nitrided shafts, gears, crankshafts, spindles, extrusion screws, and wear-resistant machine components.
BS 970 (Part 1) 905M39
Steel for surface hardening by nitriding (section three)
Key Differences
Can DIN 17211 41CrAlMo7-4 Be Substituted With BS 970 (Part 1) 905M39?
DIN 17211 41CrAlMo7-4 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 DIN 17211 41CrAlMo7-4 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
DIN 17211 41CrAlMo7-4
Round Bar → (4 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4800–6900 mm (188.98–271.65 in)
BS 970 (Part 1) 905M39
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On M-EX Right Now
DIN 17211 41CrAlMo7-4
4 active listings and RFQs →
BS 970 (Part 1) 905M39
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Frequently Asked Questions
What is the difference between DIN 17211 41CrAlMo7-4 and BS 970 (Part 1) 905M39?
DIN 17211 41CrAlMo7-4 specifies Al which is not specified for BS 970 (Part 1) 905M39.
Can DIN 17211 41CrAlMo7-4 be substituted with BS 970 (Part 1) 905M39?
DIN 17211 41CrAlMo7-4 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 DIN 17211 41CrAlMo7-4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.