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DIN 17200 40NiCrMo6 vs BS 970 (Part 1) 817A42

Close Alternative — 78.5% match based on chemical composition and mechanical property overlap.

DIN 17200 40NiCrMo6 (DIN 17200:1986) and BS 970 (Part 1) 817A42 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. DIN 17200 40NiCrMo6 is typically used for heavy forgings, crankshafts, high strength components, while BS 970 (Part 1) 817A42 is commonly used for through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of table 6.. DIN 17200 40NiCrMo6 is defined under Deutsches Institut fur Normung (DIN), originating from Germany, while BS 970 (Part 1) 817A42 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, DIN 17200 40NiCrMo6 vs BS 970 (Part 1) 817A42 is a 78.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 78.5%.

Frequently Compared With DIN 17200 40NiCrMo6:
UNI 11234 100Cr6 GOST 4543 12HN3A NF A35-565 100C6 GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 10Cr9Mo10 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 103Cr4
Match Breakdown
CHEMISTRY MATCH
78.5%
MECHANICAL MATCH
No shared data
OVERALL
78.5%
Specifications
Property DIN 17200 40NiCrMo6 BS 970 (Part 1) 817A42
Standard DIN 17200:1986 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.36–0.44 0.40-0.45
Mn (%) 0.50–0.80 0.45-0.70
Cr (%) 0.60–1.00 1.00-1.40
Mo (%) 0.15–0.30 0.20-0.35
Ni (%) 1.30–1.70 1.30-1.70
P (%) Not specified <=0.035
S (%) Not specified <=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 DIN 17200 40NiCrMo6 BS 970 (Part 1) 817A42
Tensile Strength 900–1100 MPa Not specified
Yield Strength ≥720 MPa Not specified
Elongation ≥12% Not specified
Typical Applications
DIN 17200 40NiCrMo6
Heavy forgings, crankshafts, high strength components
BS 970 (Part 1) 817A42
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can DIN 17200 40NiCrMo6 Be Substituted With BS 970 (Part 1) 817A42?
DIN 17200 40NiCrMo6 and BS 970 (Part 1) 817A42 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
Forms & Sizes Available on M-EX
DIN 17200 40NiCrMo6
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5500–6900 mm (216.54–271.65 in)
BS 970 (Part 1) 817A42
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On M-EX Right Now
DIN 17200 40NiCrMo6
2 active listings and RFQs →
BS 970 (Part 1) 817A42
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Frequently Asked Questions
What is the difference between DIN 17200 40NiCrMo6 and BS 970 (Part 1) 817A42?
BS 970 (Part 1) 817A42 specifies P, S which are not specified for DIN 17200 40NiCrMo6.
Can DIN 17200 40NiCrMo6 be substituted with BS 970 (Part 1) 817A42?
DIN 17200 40NiCrMo6 and BS 970 (Part 1) 817A42 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.