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IS 1570 (Part 4):1988 15Ni7Cr4Mo2 Steel: Specifications & Listings

IS 1570 (Part 4):1988 15Ni7Cr4Mo2: 15Ni7Cr4Mo2: alloy steel (constructional or spring group) with specified chemical composition. Specified in IS 1570 (Part 4):1988.

Category: Alloy Steel
Grade Details
GradeIS 1570 (Part 4):1988 15Ni7Cr4Mo2
Standard IS 1570 (Part 4):1988
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 11169 (Part 1) 15Ni7Cr4Mo2 IS 11169 (Part 1):2022 India No activity yet
BS 970 (Part 1) 820H17 BS 970 (Part 1):1991 UK No activity yet
BS 970 (Part 3) 820M17 BS 970 (Part 3):1991 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 11169 (Part 1) 15Ni7Cr4Mo2 IS 11169 (Part 1):2022 Strong Match
BS 970 (Part 3) 820M17 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 820M17 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 820H17 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 820H17 BS 970 (Part 1):1991 Strong Match
BS 970 (Part 3) 815M17 BS 970 (Part 3):1991 Close Alternative
IS 11169 (Part 1) 15Ni7Cr4Mo2 IS 11169 (Part 1):1984 Close Alternative
IS 4432 15Ni7Cr4Mo2 IS 4432:1988 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 Ni Cr Mo
0.12-0.18 0.15-0.35 0.60-1.00 1.50-2.00 0.75-1.25 0.10-0.20
Mechanical Properties
Tensile Strength >=1080 MPa
Elongation >=9%
Izod Impact >=35 J
Condition Case hardening steel, refined and quenched, core properties

More data from IS 1570 (Part 4):1988

From the standard
Core properties, case hardening steel, refined and quenched core properties
Tensile strength, min
1080 MPa
Elongation, min
9%
Izod impact, min
35 J
If core strength exceeds 1 000 MPa the ruling section may equal the test piece diameter.
Source: IS 1570 (Part 4):1988, Table 9

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