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IS 5517 40Cr7Al10Mo2 vs BS 970 (Part 1) 905M39

Close Alternative — 82% match based on chemical composition and mechanical property overlap.

IS 5517 40Cr7Al10Mo2 (IS 5517:1993) and BS 970 (Part 1) 905M39 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Alloy Steel category. IS 5517 40Cr7Al10Mo2 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 905M39 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 5517 40Cr7Al10Mo2 vs BS 970 (Part 1) 905M39 is a 82% 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 82%.

Frequently Compared With IS 5517 40Cr7Al10Mo2:
IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
82%
MECHANICAL MATCH
No shared data
OVERALL
82%
Specifications
Property IS 5517 40Cr7Al10Mo2 BS 970 (Part 1) 905M39
Standard IS 5517:1993 BS 970 (Part 1):1991
Category Alloy Steel Alloy Steel
C (%) 0.35-0.45 0.35-0.43
Si (%) 0.10-0.35 Not specified
Mn (%) 0.40-0.70 0.40-0.65
Cr (%) 1.50-1.80 1.40-1.80
Mo (%) 0.10-0.25 0.15-0.25
Al (%) 0.90-1.30 Not specified
S (%) <=0.035 Not specified
P (%) <=0.035 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 IS 5517 40Cr7Al10Mo2 BS 970 (Part 1) 905M39
Tensile Strength 700-850 MPa Not specified
Yield Strength (0.2% proof) 540 MPa min Not specified
Elongation >=18% Not specified
Izod Impact 55 J min Not specified
Hardness (annealed) <=230 HB Not specified
Condition Hardened and tempered, ruling section up to 150 mm Not specified
Typical Applications
IS 5517 40Cr7Al10Mo2
Not documented
BS 970 (Part 1) 905M39
Steel for surface hardening by nitriding (section three)
Key Differences
Can IS 5517 40Cr7Al10Mo2 Be Substituted With BS 970 (Part 1) 905M39?
IS 5517 40Cr7Al10Mo2 and BS 970 (Part 1) 905M39 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.
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IS 5517 40Cr7Al10Mo2
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BS 970 (Part 1) 905M39
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Frequently Asked Questions
What is the difference between IS 5517 40Cr7Al10Mo2 and BS 970 (Part 1) 905M39?
IS 5517 40Cr7Al10Mo2 specifies Si, Al, S, P which are not specified for BS 970 (Part 1) 905M39.
Can IS 5517 40Cr7Al10Mo2 be substituted with BS 970 (Part 1) 905M39?
IS 5517 40Cr7Al10Mo2 and BS 970 (Part 1) 905M39 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.