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IS 1570 (Part 4):1988 26C10BT Steel: Specifications & Listings

IS 1570 (Part 4):1988 26C10BT: 26C10BT: boron treated alloy steel with specified chemical composition. Specified in IS 1570 (Part 4):1988.

Category: Carbon Steel
Grade Details
GradeIS 1570 (Part 4):1988 26C10BT
Standard IS 1570 (Part 4):1988
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 11169 (Part 1) 26C10BT IS 11169 (Part 1):2022 India No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 1570 (Part 4) 21C10BT IS 1570 (Part 4):1988 Strong Match
IS 1570 (Part 4) 34C14BT IS 1570 (Part 4):1988 Strong Match
IS 11169 (Part 1) 27C15 IS 11169 (Part 1):1984 Close Alternative
IS 1570 (Part 4) 27C15 IS 1570 (Part 4):1988 Close Alternative
SAE J403 1526 SAE J403:2014 Close Alternative
JIS G4051 S25C JIS G4051:2009 Close Alternative
IS 1875 Class 2A IS 1875:1992 Close Alternative
SAE J403 1526 SAE J403:2001 Close Alternative
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C Si Mn B
0.23-0.29 0.15-0.30 0.90-1.2 0.0005-0.003

More data from IS 1570 (Part 4):1988

From the standard
Hardenability band (end quench test) 12 distances
Distance from quenched end (mm)Upper limit (HRC)Lower limit (HRC)
1.585245
3.105144
4.765043
6.354841
7.934634
9.524525
11.1142-
12.735-
14.2932-
15.8728-
17.4626-
19.0522-
Tentative limits for specified hardenability of boron steels.
Source: IS 1570 (Part 4):1988, Table 12

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