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IS 11169 (Part 1) 21C10BT vs IS 1570 (Part 4) 18C10BT

Close Alternative — 82.8% match based on chemical composition and mechanical property overlap.

IS 11169 (Part 1) 21C10BT (IS 11169 (Part 1):2022) and IS 1570 (Part 4) 18C10BT (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. IS 11169 (Part 1) 21C10BT is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 4) 18C10BT is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 11169 (Part 1) 21C10BT vs IS 1570 (Part 4) 18C10BT is a 82.8% 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 82.8%.

Frequently Compared With IS 11169 (Part 1) 21C10BT:
IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 IS 11169 (Part 1) 10Ni5Cr4 IS 1570 (Part 4) 103Cr4 IS 4367 10Cr9Mo10 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
82.8%
MECHANICAL MATCH
No shared data
OVERALL
82.8%
Specifications
Property IS 11169 (Part 1) 21C10BT IS 1570 (Part 4) 18C10BT
Standard IS 11169 (Part 1):2022 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
B (%) 0.0005-0.003 0.0005-0.003
C (%) 0.18-0.23 0.15-0.20
Cr (%) <=0.15 0.10-0.30
Cu (%) <=0.15 Not specified
Mn (%) 0.80-1.10 0.80-1.10
Mo (%) <=0.05 Not specified
P (%) <=0.035 Not specified
S (%) <=0.035 Not specified
Si (%) 0.15-0.30 0.15-0.30
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) 21C10BT IS 1570 (Part 4) 18C10BT
Core Hardness (CH) >=40 HRC up to 12 mm Not specified
Hardness, annealed (+AC) <=160 HBW Not specified
Typical Applications
IS 11169 (Part 1) 21C10BT
Cold heading and cold extrusion of parts that are quenched and tempered; the standard covers bars, wire rods and wires of 2 to 100 mm (clause 1.1, Annex C)
IS 1570 (Part 4) 18C10BT
Not documented
Key Differences
Can IS 11169 (Part 1) 21C10BT Be Substituted With IS 1570 (Part 4) 18C10BT?
IS 11169 (Part 1) 21C10BT and IS 1570 (Part 4) 18C10BT 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) 21C10BT
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IS 1570 (Part 4) 18C10BT
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Frequently Asked Questions
What is the difference between IS 11169 (Part 1) 21C10BT and IS 1570 (Part 4) 18C10BT?
IS 11169 (Part 1) 21C10BT specifies Cu, Mo, P, S which are not specified for IS 1570 (Part 4) 18C10BT.
Can IS 11169 (Part 1) 21C10BT be substituted with IS 1570 (Part 4) 18C10BT?
IS 11169 (Part 1) 21C10BT and IS 1570 (Part 4) 18C10BT 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.