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IS 1570 (Part 4):1988 40Cr7Al10Mo2 Steel: Specifications & Listings

IS 1570 (Part 4):1988 40Cr7Al10Mo2: 40Cr7Al10Mo2: 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 40Cr7Al10Mo2
Standard IS 1570 (Part 4):1988
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 1570 (Part 4) 40Cr5Mo6 IS 1570 (Part 4):1988 Close Alternative
IS 1570 (Part 4) 33Mo6 IS 1570 (Part 4):1988 Related Material
BS 970 (Part 3) 822M17 BS 970 (Part 3):1991 Related Material
IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4):1988 Related Material
IS 1570 (Part 4) 20Cr20Mo6 IS 1570 (Part 4):1988 Related Material
IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4):1988 Related Material
IS 1570 (Part 4) 20Mo6 IS 1570 (Part 4):1988 Related Material
IS 1570 (Part 4) 35Cr5Mo6V2 IS 1570 (Part 4):1988 Related Material
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 Al
0.35-0.45 0.10-0.45 0.40-0.70 <=0.30 1.50-1.80 0.10-0.25 0.90-1.30
Mechanical Properties
Tensile Strength 890-1040 MPa
Yield Strength >=650 MPa (0.2 % proof stress)
Elongation >=15%
Izod Impact >=48 J
Hardness 255-311 HBS (guidance only)
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 63 mm

More data from IS 1570 (Part 4):1988

From the standard
Properties, hardened and tempered 3 strength levels
Limiting ruling section (mm)Tensile strength (MPa)0.2 % proof stress, min (MPa)Elongation, min (%)Izod impact, min (J)Brinell hardness (HBS)
150690-8404901855201-248
100790-9405501655229-277
63890-10406501548255-311
Bars and forgings, oil hardened unless stated; hardness is for guidance only.
Source: IS 1570 (Part 4):1988, Table 4

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