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JIS G4801 SUP6 vs IS 1570 (Part 4) 55Si7

Strong Match — 88.9% match based on chemical composition and mechanical property overlap.

JIS G4801 SUP6 (JIS G 4801:2005) and IS 1570 (Part 4) 55Si7 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Spring Steel category. JIS G4801 SUP6 is defined under Japanese Industrial Standards (JIS), originating from Japan, while IS 1570 (Part 4) 55Si7 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, JIS G4801 SUP6 vs IS 1570 (Part 4) 55Si7 is a 88.9% 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 88.9%.

Frequently Compared With JIS G4801 SUP6:
EN 10089 55Si7 EN 10089 55Cr3 EN 10089 50CrV4 EN 10083-3 51CrV4 GB/T 1222 55CrMnA IS 3431 60Si7 IS 1570 (Part 4) 60Si7 IS 1570 (Part 4) 65Si7 IS 3195 113C6 IS 3431 50Cr4V2 BS 970 EN42C BS 970 EN42
Match Breakdown
CHEMISTRY MATCH
88.9%
MECHANICAL MATCH
No shared data
OVERALL
88.9%
Specifications
Property JIS G4801 SUP6 IS 1570 (Part 4) 55Si7
Standard JIS G 4801:2005 IS 1570 (Part 4):1988
Category Spring Steel Spring Steel
C (%) 0.56–0.64 0.50-0.60
Si (%) 1.50–1.80 1.50-2.00
Mn (%) 0.70–1.00 0.80-1.00
S (%) ≤0.030 Not specified
P (%) ≤0.030 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property JIS G4801 SUP6 IS 1570 (Part 4) 55Si7
Tensile Strength ≥1130 MPa Not specified
Yield Strength ≥980 MPa Not specified
Elongation ≥7% Not specified
Hardness 341–415 HB Not specified
Typical Applications
JIS G4801 SUP6
Automotive suspension springs, leaf springs
IS 1570 (Part 4) 55Si7
Not documented
Key Differences
Can JIS G4801 SUP6 Be Substituted With IS 1570 (Part 4) 55Si7?
JIS G4801 SUP6 and IS 1570 (Part 4) 55Si7 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 55Si7 is often considered as a substitute for JIS G4801 SUP6 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
Forms & Sizes Available on M-EX
JIS G4801 SUP6
Round Bar → (2 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 4500–5700 mm (177.17–224.41 in)
IS 1570 (Part 4) 55Si7
No active listings currently.
On M-EX Right Now
JIS G4801 SUP6
2 active listings and RFQs →
IS 1570 (Part 4) 55Si7
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4801 SUP6 and IS 1570 (Part 4) 55Si7?
JIS G4801 SUP6 specifies S, P which are not specified for IS 1570 (Part 4) 55Si7.
Can JIS G4801 SUP6 be substituted with IS 1570 (Part 4) 55Si7?
JIS G4801 SUP6 and IS 1570 (Part 4) 55Si7 overlap closely enough on chemistry and mechanical properties that IS 1570 (Part 4) 55Si7 is often considered as a substitute for JIS G4801 SUP6 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.