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IS 1570 (Part 4):1988 35C8BT Steel: Specifications & Listings

IS 1570 (Part 4):1988 35C8BT: 35C8BT: boron treated alloy steel with specified chemical composition. Specified in IS 1570 (Part 4):1988.

Category: Alloy Steel
Grade Details
GradeIS 1570 (Part 4):1988 35C8BT
Standard IS 1570 (Part 4):1988
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 11169 (Part 1) 35C8BT IS 11169 (Part 1):2022 India No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 11169 (Part 1) 33C8BT IS 11169 (Part 1):2022 Close Alternative
BS 970 EN18B BS 970:1955 Close Alternative
IS 11169 (Part 1) 35C14BT IS 11169 (Part 1):2022 Close Alternative
IS 11169 (Part 1) 34C14BT IS 11169 (Part 1):2022 Close Alternative
IS 11169 (Part 1) 36C10BT IS 11169 (Part 1):2022 Close Alternative
EN 10083-1 34Cr4 EN 10083-1:1991 Close Alternative
EN 10083-1 34Cr4 EN 10083-1:1996 Close Alternative
EN 10083-3 34Cr4 EN 10083-3:2006 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 Cr B
0.31-0.36 0.10-0.35 0.60-1.00 0.10-0.30 0.0005-0.003

More data from IS 1570 (Part 4):1988

From the standard
Hardenability band (end quench test) 17 distances
Distance from quenched end (mm)Upper limit (HRC)Lower limit (HRC)
1.585851
3.105650
4.765546
6.355443
7.935237
9.524926
11.114622
12.73820
14.293619
15.873018
17.4628-
19.0527-
22.2226-
25.425-
31.7524-
38.1022-
44.4520-
Tentative limits for specified hardenability of boron steels.
Source: IS 1570 (Part 4):1988, Table 12

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