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IS 1570 (Part 4) 31Ni10Cr3Mo6 vs IS 1570 (Part 4) 40Ni6Cr4Mo3

Close Alternative — 77.1% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 31Ni10Cr3Mo6 (IS 1570 (Part 4):1988) and IS 1570 (Part 4) 40Ni6Cr4Mo3 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 31Ni10Cr3Mo6 is defined under Bureau of Indian Standards (IS), originating from India, while IS 1570 (Part 4) 40Ni6Cr4Mo3 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 4) 31Ni10Cr3Mo6 vs IS 1570 (Part 4) 40Ni6Cr4Mo3 is a 65.7% match. As per mechanical properties, the match is 100%. Combined, this makes them a close alternative overall at 77.1%.

Frequently Compared With IS 1570 (Part 4) 31Ni10Cr3Mo6:
IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 GB/T 3077 12Cr2Ni4A IS 1570 (Part 7) 12Cr4Mo5H IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H IS 4367 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
65.7%
MECHANICAL MATCH
100%
OVERALL
77.1%
Specifications
Property IS 1570 (Part 4) 31Ni10Cr3Mo6 IS 1570 (Part 4) 40Ni6Cr4Mo3
Standard IS 1570 (Part 4):1988 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.27-0.35 0.35-0.45
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.40-0.70 0.40-0.70
Ni (%) 2.25-2.75 1.25-1.75
Cr (%) 0.50-0.80 0.90-1.30
Mo (%) 0.40-0.70 0.20-0.35
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 4) 31Ni10Cr3Mo6 IS 1570 (Part 4) 40Ni6Cr4Mo3
Tensile Strength 1190-1340 MPa 1190-1340 MPa
Yield Strength >=930 MPa (0.2 % proof stress) >=930 MPa (0.2 % proof stress)
Elongation >=10% >=10%
Izod Impact >=35 J >=30 J
Hardness 341-401 HBS (guidance only) 341-401 HBS (guidance only)
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 63 mm Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 30 mm
Can IS 1570 (Part 4) 31Ni10Cr3Mo6 Be Substituted With IS 1570 (Part 4) 40Ni6Cr4Mo3?
IS 1570 (Part 4) 31Ni10Cr3Mo6 and IS 1570 (Part 4) 40Ni6Cr4Mo3 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
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IS 1570 (Part 4) 31Ni10Cr3Mo6
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IS 1570 (Part 4) 40Ni6Cr4Mo3
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 31Ni10Cr3Mo6 and IS 1570 (Part 4) 40Ni6Cr4Mo3?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can IS 1570 (Part 4) 31Ni10Cr3Mo6 be substituted with IS 1570 (Part 4) 40Ni6Cr4Mo3?
IS 1570 (Part 4) 31Ni10Cr3Mo6 and IS 1570 (Part 4) 40Ni6Cr4Mo3 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.