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IS 1570 (Part 4) 40Cr4 vs BS 970 (Part 1) 530A40

Strong Match — 86.7% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 40Cr4 (IS 1570 (Part 4):1988) and BS 970 (Part 1) 530A40 (BS 970 (Part 1):1983) 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 BS 970 (Part 1) 530A40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 40Cr4 vs BS 970 (Part 1) 530A40 is a 86.7% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 86.7%.

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
86.7%
MECHANICAL MATCH
No shared data
OVERALL
86.7%
Specifications
Property IS 1570 (Part 4) 40Cr4 BS 970 (Part 1) 530A40
Standard IS 1570 (Part 4):1988 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.35-0.45 0.38-0.43
Si (%) 0.10-0.35 Not specified
Mn (%) 0.60-0.90 0.60-0.80
Cr (%) 0.90-1.20 0.90-1.20
P (%) Not specified <=0.035
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 BS 970 (Part 1) 530A40
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
BS 970 (Part 1) 530A40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can IS 1570 (Part 4) 40Cr4 Be Substituted With BS 970 (Part 1) 530A40?
IS 1570 (Part 4) 40Cr4 and BS 970 (Part 1) 530A40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 530A40 is often considered as a substitute for IS 1570 (Part 4) 40Cr4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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IS 1570 (Part 4) 40Cr4
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BS 970 (Part 1) 530A40
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 40Cr4 and BS 970 (Part 1) 530A40?
IS 1570 (Part 4) 40Cr4 specifies Si which is not specified for BS 970 (Part 1) 530A40. BS 970 (Part 1) 530A40 specifies P, S which are not specified for IS 1570 (Part 4) 40Cr4.
Can IS 1570 (Part 4) 40Cr4 be substituted with BS 970 (Part 1) 530A40?
IS 1570 (Part 4) 40Cr4 and BS 970 (Part 1) 530A40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 530A40 is often considered as a substitute for IS 1570 (Part 4) 40Cr4 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.