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DIN 17210 18CrNiMo6 vs BS 970 (Part 3) 817M40

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

DIN 17210 18CrNiMo6 (DIN 17210:1986) and BS 970 (Part 3) 817M40 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. DIN 17210 18CrNiMo6 is typically used for heavy duty gears, shafts, cams, axles, case hardened transmission components, while BS 970 (Part 3) 817M40 is commonly used for high tensile shafts, gears, crankshafts. DIN 17210 18CrNiMo6 is defined under Deutsches Institut fur Normung (DIN), originating from Germany, while BS 970 (Part 3) 817M40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, DIN 17210 18CrNiMo6 vs BS 970 (Part 3) 817M40 is a 72.3% 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 DIN 17210 18CrNiMo6:
GB/T 3077 12Cr2Ni4A NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
72.3%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property DIN 17210 18CrNiMo6 BS 970 (Part 3) 817M40
Standard DIN 17210:1986 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.15–0.21 0.36-0.44
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
Si (%) 0.15–0.40 0.10-0.40
S (%) ≤0.035 <=0.040
P (%) ≤0.035 <=0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property DIN 17210 18CrNiMo6 BS 970 (Part 3) 817M40
Tensile Strength 1000–1200 MPa Not specified
Case Hardness HRC 58–63 Not specified
Core Hardness HB 280–340 Not specified
Elongation ≥9% Not specified
Typical Applications
DIN 17210 18CrNiMo6
Heavy duty gears, shafts, cams, axles, case hardened transmission components
BS 970 (Part 3) 817M40
High tensile shafts, gears, crankshafts
Can DIN 17210 18CrNiMo6 Be Substituted With BS 970 (Part 3) 817M40?
DIN 17210 18CrNiMo6 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
DIN 17210 18CrNiMo6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–5400 mm (196.85–212.6 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
DIN 17210 18CrNiMo6
2 active listings and RFQs →
BS 970 (Part 3) 817M40
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between DIN 17210 18CrNiMo6 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 DIN 17210 18CrNiMo6 be substituted with BS 970 (Part 3) 817M40?
DIN 17210 18CrNiMo6 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.