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IS 1570 (Part 4):1988 40Ni14 Steel: Specifications & Listings

IS 1570 (Part 4):1988 40Ni14: 40Ni14: 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 40Ni14
Standard IS 1570 (Part 4):1988
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
IS 1570 (Part 4) 35Ni5Cr2 IS 1570 (Part 4):1988 Related Material
BS 970 (Part 3) 635M15 BS 970 (Part 3):1991 Related Material
BS 970 (Part 3) 637M17 BS 970 (Part 3):1991 Related Material
BS 970 (Part 3) 655M13 BS 970 (Part 3):1991 Related Material
BS 970 EN111A BS 970:1955 Related Material
SAE J404 50B46 SAE J404:2009 Related Material
IS 1570 (Part 4) 15Cr6Ni6 IS 1570 (Part 4):1988 Related Material
BS 970 (Part 1) 655H13 BS 970 (Part 1):1991 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
0.35-0.45 0.10-0.35 0.50-0.80 3.20-3.60 <=0.30
Mechanical Properties
Tensile Strength 890-1040 MPa
Yield Strength >=650 MPa (0.2 % proof stress)
Elongation >=15%
Izod Impact >=55 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 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)
100790-9405501655229-277
63890-10406501555255-311
Bars and forgings, oil hardened unless stated; hardness is for guidance only.
Source: IS 1570 (Part 4):1988, Table 4

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