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

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

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

As per chemical composition, BS 970 (Part 1) 905M39 vs IS 5517 40Cr7Al10Mo2 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 BS 970 (Part 1) 905M39:
IS 1570 (Part 4) 103Cr6 IS 11169 (Part 1) 10Ni5Cr4 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10
Match Breakdown
CHEMISTRY MATCH
82%
MECHANICAL MATCH
No shared data
OVERALL
82%
Specifications
Property BS 970 (Part 1) 905M39 IS 5517 40Cr7Al10Mo2
Standard BS 970 (Part 1):1991 IS 5517:1993
Category Alloy Steel Alloy Steel
C (%) 0.35-0.43 0.35-0.45
Mn (%) 0.40-0.65 0.40-0.70
Cr (%) 1.40-1.80 1.50-1.80
Mo (%) 0.15-0.25 0.10-0.25
Si (%) Not specified 0.10-0.35
Al (%) Not specified 0.90-1.30
S (%) Not specified <=0.035
P (%) Not specified <=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 BS 970 (Part 1) 905M39 IS 5517 40Cr7Al10Mo2
Tensile Strength Not specified 700-850 MPa
Yield Strength (0.2% proof) Not specified 540 MPa min
Elongation Not specified >=18%
Izod Impact Not specified 55 J min
Hardness (annealed) Not specified <=230 HB
Condition Not specified Hardened and tempered, ruling section up to 150 mm
Typical Applications
BS 970 (Part 1) 905M39
Steel for surface hardening by nitriding (section three)
IS 5517 40Cr7Al10Mo2
Not documented
Key Differences
Can BS 970 (Part 1) 905M39 Be Substituted With IS 5517 40Cr7Al10Mo2?
BS 970 (Part 1) 905M39 and IS 5517 40Cr7Al10Mo2 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.
On M-EX Right Now
BS 970 (Part 1) 905M39
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IS 5517 40Cr7Al10Mo2
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 905M39 and IS 5517 40Cr7Al10Mo2?
IS 5517 40Cr7Al10Mo2 specifies Si, Al, S, P which are not specified for BS 970 (Part 1) 905M39.
Can BS 970 (Part 1) 905M39 be substituted with IS 5517 40Cr7Al10Mo2?
BS 970 (Part 1) 905M39 and IS 5517 40Cr7Al10Mo2 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.