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IS 11169 (Part 1) 15Cr3 vs BS 970 (Part 3) 637M17

Close Alternative — 72.2% match based on chemical composition and mechanical property overlap.

IS 11169 (Part 1) 15Cr3 (IS 11169 (Part 1):2022) and BS 970 (Part 3) 637M17 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Alloy Steel category. IS 11169 (Part 1) 15Cr3 is typically used for cold heading and cold extrusion of parts that are case hardened; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, annex b), while BS 970 (Part 3) 637M17 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (table 15). IS 11169 (Part 1) 15Cr3 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 3) 637M17 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 11169 (Part 1) 15Cr3 vs BS 970 (Part 3) 637M17 is a 72.2% 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 72.2%.

Frequently Compared With IS 11169 (Part 1) 15Cr3:
NF A35-565 100C6 IS 4367 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 11169 (Part 1) 10Ni5Cr4 UNI 11234 100Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Cr20Mo6
Match Breakdown
CHEMISTRY MATCH
72.2%
MECHANICAL MATCH
No shared data
OVERALL
72.2%
Specifications
Property IS 11169 (Part 1) 15Cr3 BS 970 (Part 3) 637M17
Standard IS 11169 (Part 1):2022 BS 970 (Part 3):1991
Category Alloy Steel Alloy Steel
C (%) 0.12-0.18 0.14-0.20
Cr (%) 0.50-0.80 0.60-1.00
Cu (%) <=0.15 Not specified
Mn (%) 0.40-0.60 0.60-0.90
Mo (%) <=0.05 Not specified
Ni (%) <=0.15 0.85-1.25
P (%) <=0.035 <=0.04
S (%) <=0.035 <=0.05
Si (%) 0.10-0.35 0.10-0.40
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 11169 (Part 1) 15Cr3 BS 970 (Part 3) 637M17
Hardness, annealed (+AC) <=140 HBW Not specified
Typical Applications
IS 11169 (Part 1) 15Cr3
Cold heading and cold extrusion of parts that are case hardened; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex B)
BS 970 (Part 3) 637M17
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; alloy case hardening steel (Table 15)
Key Differences
Can IS 11169 (Part 1) 15Cr3 Be Substituted With BS 970 (Part 3) 637M17?
IS 11169 (Part 1) 15Cr3 and BS 970 (Part 3) 637M17 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
IS 11169 (Part 1) 15Cr3
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BS 970 (Part 3) 637M17
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Frequently Asked Questions
What is the difference between IS 11169 (Part 1) 15Cr3 and BS 970 (Part 3) 637M17?
IS 11169 (Part 1) 15Cr3 specifies Cu, Mo which are not specified for BS 970 (Part 3) 637M17.
Can IS 11169 (Part 1) 15Cr3 be substituted with BS 970 (Part 3) 637M17?
IS 11169 (Part 1) 15Cr3 and BS 970 (Part 3) 637M17 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.