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EN 10084 17CrNiMo6 vs BS 970 (Part 3) 817M40

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

EN 10084 17CrNiMo6 (EN 10084:1998) and BS 970 (Part 3) 817M40 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. EN 10084 17CrNiMo6 is typically used for used in heavy-duty gears, pinions, drive shafts, transmission parts, and industrial gearboxes., while BS 970 (Part 3) 817M40 is commonly used for high tensile shafts, gears, crankshafts. EN 10084 17CrNiMo6 is defined under European Standard (EN), originating from Europe, while BS 970 (Part 3) 817M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, EN 10084 17CrNiMo6 vs BS 970 (Part 3) 817M40 is a 72.6% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With EN 10084 17CrNiMo6:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A GB/T 3077 12Cr2Ni4A IS 4367 10Cr9Mo10 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
72.6%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property EN 10084 17CrNiMo6 BS 970 (Part 3) 817M40
Standard EN 10084:1998 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.15-0.21 0.36-0.44
Si (%) 0.15-0.40 0.10-0.40
Mn (%) 0.50-0.90 0.45-0.70
Cr (%) 1.50-1.80 1.00-1.40
Ni (%) 1.40-1.70 1.30-1.70
Mo (%) 0.25-0.35 0.20-0.35
P (%) <=0.025 <=0.035
S (%) <=0.035 <=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 EN 10084 17CrNiMo6 BS 970 (Part 3) 817M40
Tensile Strength 900-1200 MPa Not specified
Yield Strength 750 MPa min Not specified
Elongation 9-12% Not specified
Hardness 280-340 HB Not specified
Typical Applications
EN 10084 17CrNiMo6
Used in heavy-duty gears, pinions, drive shafts, transmission parts, and industrial gearboxes.
BS 970 (Part 3) 817M40
High tensile shafts, gears, crankshafts
Can EN 10084 17CrNiMo6 Be Substituted With BS 970 (Part 3) 817M40?
EN 10084 17CrNiMo6 and BS 970 (Part 3) 817M40 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
EN 10084 17CrNiMo6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5900–6200 mm (232.28–244.09 in)
BS 970 (Part 3) 817M40
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6200–6500 mm (244.09–255.91 in)
On M-EX Right Now
EN 10084 17CrNiMo6
2 active listings and RFQs →
BS 970 (Part 3) 817M40
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between EN 10084 17CrNiMo6 and BS 970 (Part 3) 817M40?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can EN 10084 17CrNiMo6 be substituted with BS 970 (Part 3) 817M40?
EN 10084 17CrNiMo6 and BS 970 (Part 3) 817M40 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.