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JIS G4801 SUP9 vs IS 3431 50Cr4V2

Minimal Match — 50.6% match based on chemical composition and mechanical property overlap.

JIS G4801 SUP9 (JIS G 4801:2005) and IS 3431 50Cr4V2 (IS 3431:1982) are both steel grades. Both fall under the Spring Steel category. JIS G4801 SUP9 is typically used for automotive leaf springs, suspension springs, while IS 3431 50Cr4V2 is commonly used for valve springs,high performance automotive springs,aerospace springs,coil springs,torsion bars. JIS G4801 SUP9 is defined under Japanese Industrial Standards (JIS), originating from Japan, while IS 3431 50Cr4V2 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, JIS G4801 SUP9 vs IS 3431 50Cr4V2 is a 75.9% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 50.6%.

Frequently Compared With JIS G4801 SUP9:
EN 10089 55Cr3 EN 10089 50CrV4 EN 10089 55Si7 EN 10083-3 51CrV4 GB/T 1222 55CrMnA IS 3195 113C6 IS 3195 50Cr4V2 EN 10083-1 51CrV4 EN 10083-1 51CrV4 IS 3195 52Cr4Mo2V IS 5517 55Cr3 IS 1570 (Part 4) 55Si7
Match Breakdown
CHEMISTRY MATCH
75.9%
MECHANICAL MATCH
0%
OVERALL
50.6%
Specifications
Property JIS G4801 SUP9 IS 3431 50Cr4V2
Standard JIS G 4801:2005 IS 3431:1982
Category Spring Steel Spring Steel
C (%) 0.52–0.60 0.45-0.55
Mn (%) 0.65–0.95 0.50-0.80
Cr (%) 0.65–0.95 0.90-1.20
Si (%) 0.15–0.35 0.15-0.35
P (%) ≤0.030 <=0.045
S (%) ≤0.030 <=0.045
V (%) Not specified 0.15-0.30
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 SUP9 IS 3431 50Cr4V2
Tensile Strength 1180 MPa min (oil hardened) Not specified
Yield Strength ≥1030 MPa Not specified
Elongation ≥7% Not specified
Hardness 363–429 HB Not specified
Core Hardness After Quenching Not specified >=54 HRC (oil, up to 25 mm round / 16 mm flat)
Elongation (quenched and tempered) Not specified >=6%
Hardness, soft annealed Not specified <=245 HB
Hardness, untreated (hot rolled) Not specified above 310 HB (reference value)
Tensile Strength (quenched and tempered) Not specified 1370-1620 MPa
Yield Stress (quenched and tempered) Not specified >=1180 MPa
Typical Applications
JIS G4801 SUP9
Automotive leaf springs, suspension springs
IS 3431 50Cr4V2
valve springs,high performance automotive springs,aerospace springs,coil springs,torsion bars
Key Differences
Can JIS G4801 SUP9 Be Substituted With IS 3431 50Cr4V2?
JIS G4801 SUP9 and IS 3431 50Cr4V2 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
Forms & Sizes Available on M-EX
JIS G4801 SUP9
Round Bar → (4 listings)
Diameter: 30–35 mm (1.18–1.38 in)
Length: 3900–6700 mm (153.54–263.78 in)
IS 3431 50Cr4V2
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 6700–7000 mm (263.78–275.59 in)
On M-EX Right Now
JIS G4801 SUP9
4 active listings and RFQs →
IS 3431 50Cr4V2
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4801 SUP9 and IS 3431 50Cr4V2?
IS 3431 50Cr4V2 specifies V which is not specified for JIS G4801 SUP9.
Can JIS G4801 SUP9 be substituted with IS 3431 50Cr4V2?
JIS G4801 SUP9 and IS 3431 50Cr4V2 share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.