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IS 11169 (Part 1) 25C4 vs BS 970 (Part 1) 635H15

Related Material — 65% match based on chemical composition and mechanical property overlap.

IS 11169 (Part 1) 25C4 (IS 11169 (Part 1):2022) and BS 970 (Part 1) 635H15 (BS 970 (Part 1):1991) are both steel grades. IS 11169 (Part 1) 25C4 is classified under Carbon Steel, while BS 970 (Part 1) 635H15 is classified under Alloy Steel — a different category, which is worth noting alongside the chemistry match below. IS 11169 (Part 1) 25C4 is typically used for cold heading and cold extrusion of parts not heat treated after cold forming; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, annex a), while BS 970 (Part 1) 635H15 is commonly used for case hardening steel (section four). IS 11169 (Part 1) 25C4 is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 (Part 1) 635H15 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 11169 (Part 1) 25C4 vs BS 970 (Part 1) 635H15 is a 65% 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 65%.

Frequently Compared With IS 11169 (Part 1) 25C4:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 3) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 040A04
Match Breakdown
CHEMISTRY MATCH
65%
MECHANICAL MATCH
No shared data
OVERALL
65%
Specifications
Property IS 11169 (Part 1) 25C4 BS 970 (Part 1) 635H15
Standard IS 11169 (Part 1):2022 BS 970 (Part 1):1991
Category Carbon Steel Alloy Steel
C (%) 0.20-0.30 0.12-0.18
Cr (%) <=0.15 0.40-0.80
Cu (%) <=0.15 Not specified
Mn (%) 0.30-0.60 0.60-0.90
Mo (%) <=0.05 Not specified
Ni (%) <=0.15 0.70-1.10
P (%) <=0.035 Not specified
S (%) <=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 11169 (Part 1) 25C4 BS 970 (Part 1) 635H15
Hardness, annealed (+AC) <=150 HBW Not specified
Typical Applications
IS 11169 (Part 1) 25C4
Cold heading and cold extrusion of parts not heat treated after cold forming; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex A)
BS 970 (Part 1) 635H15
Case hardening steel (section four)
Key Differences
Can IS 11169 (Part 1) 25C4 Be Substituted With BS 970 (Part 1) 635H15?
IS 11169 (Part 1) 25C4 and BS 970 (Part 1) 635H15 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.
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IS 11169 (Part 1) 25C4
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BS 970 (Part 1) 635H15
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Frequently Asked Questions
What is the difference between IS 11169 (Part 1) 25C4 and BS 970 (Part 1) 635H15?
Different category: IS 11169 (Part 1) 25C4 is Carbon Steel, BS 970 (Part 1) 635H15 is Alloy Steel. IS 11169 (Part 1) 25C4 specifies Cu, Mo, P, S which are not specified for BS 970 (Part 1) 635H15.
Can IS 11169 (Part 1) 25C4 be substituted with BS 970 (Part 1) 635H15?
IS 11169 (Part 1) 25C4 and BS 970 (Part 1) 635H15 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.