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IS 1570 (Part 4) 40Cr4 vs SAE J404 5140

Close Alternative — 82.4% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 40Cr4 (IS 1570 (Part 4):1988) and SAE J404 5140 (SAE J404:2009) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 40Cr4 is defined under Bureau of Indian Standards (IS), originating from India, while SAE J404 5140 is defined under SAE International, originating from United States.

As per chemical composition, IS 1570 (Part 4) 40Cr4 vs SAE J404 5140 is a 82.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 82.4%.

Frequently Compared With IS 1570 (Part 4) 40Cr4:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 GB/T 3077 12Cr2Ni4A IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 GOST 4543 12HN3A IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
82.4%
MECHANICAL MATCH
No shared data
OVERALL
82.4%
Specifications
Property IS 1570 (Part 4) 40Cr4 SAE J404 5140
Standard IS 1570 (Part 4):1988 SAE J404:2009
Category Alloy Steel Alloy Steel
C (%) 0.35-0.45 0.38-0.43
Si (%) 0.10-0.35 0.15-0.35
Mn (%) 0.60-0.90 0.70-0.90
Cr (%) 0.90-1.20 0.70-0.90
P (%) Not specified <=0.030
S (%) Not specified <=0.040
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) 40Cr4 SAE J404 5140
Tensile Strength 890-1040 MPa Not specified
Yield Strength >=650 MPa (0.2 % proof stress) Not specified
Elongation >=11% Not specified
Izod Impact >=50 J Not specified
Hardness 255-311 HBS (guidance only) Not specified
Condition Bars and forgings, hardened and tempered (oil hardened unless stated), limiting ruling section 30 mm Not specified
Typical Applications
IS 1570 (Part 4) 40Cr4
Not documented
SAE J404 5140
Used for gears, shafts, spindles, automotive parts, bolts, and machine components.
Key Differences
Can IS 1570 (Part 4) 40Cr4 Be Substituted With SAE J404 5140?
IS 1570 (Part 4) 40Cr4 and SAE J404 5140 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.
Forms & Sizes Available on M-EX
IS 1570 (Part 4) 40Cr4
No active listings currently.
SAE J404 5140
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5400–5900 mm (212.6–232.28 in)
On M-EX Right Now
IS 1570 (Part 4) 40Cr4
0 active listings and RFQs →
SAE J404 5140
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 40Cr4 and SAE J404 5140?
SAE J404 5140 specifies P, S which are not specified for IS 1570 (Part 4) 40Cr4.
Can IS 1570 (Part 4) 40Cr4 be substituted with SAE J404 5140?
IS 1570 (Part 4) 40Cr4 and SAE J404 5140 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.