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IS 1570 (Part 4):1988 55Cr3 Steel: Specifications & Listings

IS 1570 (Part 4):1988 55Cr3: 55Cr3: 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 55Cr3
Standard IS 1570 (Part 4):1988
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
SAE J404 5150 SAE J404:2009 Close Alternative
SAE J404 5150 SAE J404:2000 Close Alternative
SAE J404 5160 SAE J404:2009 Close Alternative
SAE J404 51B60 SAE J404:2009 Close Alternative
SAE J404 5160 SAE J404:2000 Close Alternative
SAE J404 51B60 SAE J404:2000 Close Alternative
SAE J404 5140 SAE J404:2009 Close Alternative
IS 1570 (Part 4) 40Cr4 IS 1570 (Part 4):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 Cr
0.50-0.60 0.10-0.35 0.60-0.80 0.60-0.80
Mechanical Properties
Tensile Strength 890-1040 MPa
Yield Strength >=650 MPa (0.2 % proof stress)
Elongation >=12%
Izod Impact >=35 J
Hardness 255-311 HBS (guidance only)
Condition Wear resisting steel, hardened and tempered, limiting ruling section 63 mm

More data from IS 1570 (Part 4):1988

From the standard
Properties, wear resisting steel, hardened and tempered 2 strength levels
Limiting ruling section (mm)Tensile strength (MPa)0.2 % proof stress, min (MPa)Elongation, min (%)Izod impact, min (J)Brinell hardness (HBS)
63890-10406501235255-311
63990-11407301017285-341
Hardness is for guidance only.
Source: IS 1570 (Part 4):1988, Table 8

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