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IS 1570 (Part 4):1988 35Mn6Mo3 Steel: Specifications & Listings

IS 1570 (Part 4):1988 35Mn6Mo3: 35Mn6Mo3: 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 35Mn6Mo3
Standard IS 1570 (Part 4):1988
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
IS 11169 (Part 1) 35Mn6Mo3 IS 11169 (Part 1):2022 India No activity yet
BS 970 (Part 3) 605M36 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 3) 606M36 BS 970 (Part 3):1991 UK No activity yet
BS 970 (Part 1) 605H37 BS 970 (Part 1):1983 UK No activity yet
Grade ComparisonCompare With a Specific Grade →
Grade Standard Match
BS 970 (Part 3) 605M36 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 3) 606M36 BS 970 (Part 3):1991 Strong Match
BS 970 (Part 1) 606M36 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 605M36 BS 970 (Part 1):1983 Strong Match
IS 1570 (Part 4) 35Mn6Mo4 IS 1570 (Part 4):1988 Strong Match
BS 970 (Part 1) 605H37 BS 970 (Part 1):1983 Strong Match
BS 970 (Part 1) 605A32 BS 970 (Part 1):1983 Close Alternative
BS 970 (Part 1) 605A37 BS 970 (Part 1):1983 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 Mo
0.30-0.40 0.10-0.35 1.30-1.80 0.20-0.35
Mechanical Properties
Tensile Strength 990-1140 MPa
Yield Strength >=750 MPa (0.2 % proof stress)
Elongation >=10%
Izod Impact >=48 J
Hardness 285-341 HBS (guidance only)
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 30 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)
150690-8404901455201-248
100790-9405501250229-277
63890-10406501250255-311
30990-11407501048285-341
Bars and forgings, oil hardened unless stated; hardness is for guidance only.
Source: IS 1570 (Part 4):1988, Table 4

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