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IS 1570 (Part 4) 65Si7 vs IS 4367 55Si7

Strong Match — 90% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 65Si7 (IS 1570 (Part 4):1988) and IS 4367 55Si7 (IS 4367:1991) are both steel grades. Both fall under the Spring Steel category. IS 1570 (Part 4) 65Si7 is defined under Bureau of Indian Standards (IS), originating from India, while IS 4367 55Si7 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 4) 65Si7 vs IS 4367 55Si7 is a 90% 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 90%.

Frequently Compared With IS 1570 (Part 4) 65Si7:
IS 3431 55Si7 IS 1570 (Part 4) 60Si7 IS 3431 60Si7 IS 3195 113C6 IS 1570 (Part 4) 55Si7 EN 10089 55Si7 IS 3195 55Si7 IS 3195 60Si7 IS 3195 65Si7 EN 10089 55Cr3 IS 3431 65Si7 IS 3195 98C6
Match Breakdown
CHEMISTRY MATCH
90%
MECHANICAL MATCH
No shared data
OVERALL
90%
Specifications
Property IS 1570 (Part 4) 65Si7 IS 4367 55Si7
Standard IS 1570 (Part 4):1988 IS 4367:1991
Category Spring Steel Spring Steel
C (%) 0.60-0.70 0.50-0.60
Si (%) 1.50-2.00 1.50-2.00
Mn (%) 0.80-1.00 0.80-1.00
S (%) Not specified <=0.035
P (%) Not specified <=0.035
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) 65Si7 IS 4367 55Si7
Tensile Strength Not specified 1300-1500 MPa
Hardness Not specified 380-440 HB
Hardness (soft annealed) Not specified <=245 HB
Condition Not specified Hardened and tempered, ruling section up to 100 mm
Key Differences
Can IS 1570 (Part 4) 65Si7 Be Substituted With IS 4367 55Si7?
IS 1570 (Part 4) 65Si7 and IS 4367 55Si7 overlap closely enough on chemistry and mechanical properties that IS 4367 55Si7 is often considered as a substitute for IS 1570 (Part 4) 65Si7 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) 65Si7
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IS 4367 55Si7
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 65Si7 and IS 4367 55Si7?
IS 4367 55Si7 specifies S, P which are not specified for IS 1570 (Part 4) 65Si7.
Can IS 1570 (Part 4) 65Si7 be substituted with IS 4367 55Si7?
IS 1570 (Part 4) 65Si7 and IS 4367 55Si7 overlap closely enough on chemistry and mechanical properties that IS 4367 55Si7 is often considered as a substitute for IS 1570 (Part 4) 65Si7 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.