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IS 1570 (Part 4):1988 40Ni10Cr3Mo6 Steel: Specifications & Listings

IS 1570 (Part 4):1988 40Ni10Cr3Mo6: 40Ni10Cr3Mo6: 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 40Ni10Cr3Mo6
Standard IS 1570 (Part 4):1988
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
BS 970 (Part 3) 826M40 BS 970 (Part 3):1991 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 3) 826M40 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 826M40 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 3) 826M31 BS 970 (Part 3):1991 Close Alternative
BS 970 (Part 1) 826M31 BS 970 (Part 1):1983 Close Alternative
BS 970 (Part 3) 817M40 BS 970 (Part 3):1991 Close Alternative
IS 1570 (Part 4) 20Mo6 IS 1570 (Part 4):1988 Related Material
IS 1570 (Part 4) 33Mo6 IS 1570 (Part 4):1988 Related Material
IS 1570 (Part 4) 15Cr13Mo6 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
0.36-0.44 0.10-0.35 0.40-0.70 2.25-2.75 0.50-0.80 0.40-0.70
Mechanical Properties
Tensile Strength >=1540 MPa
Yield Strength >=1240 MPa (0.2 % proof stress)
Elongation >=8%
Izod Impact >=14 J
Hardness >=444 HBS (guidance only)
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 100 mm

More data from IS 1570 (Part 4):1988

From the standard
Properties, hardened and tempered 4 strength levels
Limiting ruling section (mm)Tensile strength (MPa)0.2 % proof stress, min (MPa)Elongation, min (%)Izod impact, min (J)Brinell hardness (HBS)
150990-11407501248285-341
1501090-12408301141311-363
1501190-13409301035341-401
100>=15401240814>=444
Bars and forgings, oil hardened unless stated; hardness is for guidance only.
Source: IS 1570 (Part 4):1988, Table 4

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