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IS 1570 (Part 4) 26C10BT vs IS 11169 (Part 1) 27C15

Close Alternative — 83.1% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 26C10BT (IS 1570 (Part 4):1988) and IS 11169 (Part 1) 27C15 (IS 11169 (Part 1):1984) are both steel grades. Both fall under the Carbon Steel category. IS 1570 (Part 4) 26C10BT is defined under Bureau of Indian Standards (IS), originating from India, while IS 11169 (Part 1) 27C15 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 4) 26C10BT vs IS 11169 (Part 1) 27C15 is a 83.1% 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 83.1%.

Frequently Compared With IS 1570 (Part 4) 26C10BT:
BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A10 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 060A32 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 3) 045A10
Match Breakdown
CHEMISTRY MATCH
83.1%
MECHANICAL MATCH
No shared data
OVERALL
83.1%
Specifications
Property IS 1570 (Part 4) 26C10BT IS 11169 (Part 1) 27C15
Standard IS 1570 (Part 4):1988 IS 11169 (Part 1):1984
Category Carbon Steel Carbon Steel
C (%) 0.23-0.29 0.22-0.32
Si (%) 0.15-0.30 0.10-0.35
Mn (%) 0.90-1.2 1.30-1.70
B (%) 0.0005-0.003 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 1570 (Part 4) 26C10BT IS 11169 (Part 1) 27C15
Hardness, annealed Not specified <=190 HB
Typical Applications
IS 1570 (Part 4) 26C10BT
Not documented
IS 11169 (Part 1) 27C15
Manganese case-hardening steel; used for gears, shafts, and machine components requiring case hardening where higher core strength than plain carbon grades is needed
Key Differences
Can IS 1570 (Part 4) 26C10BT Be Substituted With IS 11169 (Part 1) 27C15?
IS 1570 (Part 4) 26C10BT and IS 11169 (Part 1) 27C15 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
IS 1570 (Part 4) 26C10BT
No active listings currently.
IS 11169 (Part 1) 27C15
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 5600–5700 mm (220.47–224.41 in)
On M-EX Right Now
IS 1570 (Part 4) 26C10BT
0 active listings and RFQs →
IS 11169 (Part 1) 27C15
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 26C10BT and IS 11169 (Part 1) 27C15?
IS 1570 (Part 4) 26C10BT specifies B which is not specified for IS 11169 (Part 1) 27C15.
Can IS 1570 (Part 4) 26C10BT be substituted with IS 11169 (Part 1) 27C15?
IS 1570 (Part 4) 26C10BT and IS 11169 (Part 1) 27C15 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.