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JIS G4801 SUP10 vs JIS G4801 SUP9

Strong Match — 88.3% match based on chemical composition and mechanical property overlap.

JIS G4801 SUP10 (JIS G 4801:2005) and JIS G4801 SUP9 (JIS G 4801:2005) are both steel grades. Both fall under the Spring Steel category. JIS G4801 SUP10 is typically used for valve springs, high stress coil springs, torsion springs, while JIS G4801 SUP9 is commonly used for automotive leaf springs, suspension springs. JIS G4801 SUP10 is defined under Japanese Industrial Standards (JIS), originating from Japan, while JIS G4801 SUP9 is defined under Japanese Industrial Standards (JIS), originating from Japan.

As per chemical composition, JIS G4801 SUP10 vs JIS G4801 SUP9 is a 82.5% match. As per mechanical properties, the match is 100%. Combined, this makes them a strong match overall at 88.3%.

Frequently Compared With JIS G4801 SUP10:
IS 3431 50Cr4V2 EN 10089 55Si7 EN 10089 50CrV4 EN 10089 55Cr3 EN 10083-3 51CrV4 GB/T 1222 55CrMnA EN 10083-1 51CrV4 IS 3195 113C6 IS 3195 50Cr4V2 EN 10083-1 51CrV4 IS 3195 52Cr4Mo2V IS 5517 55Cr3
Match Breakdown
CHEMISTRY MATCH
82.5%
MECHANICAL MATCH
100%
OVERALL
88.3%
Specifications
Property JIS G4801 SUP10 JIS G4801 SUP9
Standard JIS G 4801:2005 JIS G 4801:2005
Category Spring Steel Spring Steel
C (%) 0.47–0.55 0.52–0.60
Si (%) 0.15–0.35 0.15–0.35
Mn (%) 0.65–0.95 0.65–0.95
Cr (%) 0.80–1.10 0.65–0.95
V (%) 0.15–0.25 Not specified
P (%) ≤0.030 ≤0.030
S (%) ≤0.030 ≤0.030
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 SUP10 JIS G4801 SUP9
Tensile Strength ≥1180 MPa 1180 MPa min (oil hardened)
Yield Strength ≥1030 MPa ≥1030 MPa
Elongation ≥7% ≥7%
Hardness 363–429 HB 363–429 HB
Typical Applications
JIS G4801 SUP10
Valve springs, high stress coil springs, torsion springs
JIS G4801 SUP9
Automotive leaf springs, suspension springs
Key Differences
Can JIS G4801 SUP10 Be Substituted With JIS G4801 SUP9?
JIS G4801 SUP10 and JIS G4801 SUP9 overlap closely enough on chemistry and mechanical properties that JIS G4801 SUP9 is often considered as a substitute for JIS G4801 SUP10 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 SUP10
Round Bar → (3 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 5100–5900 mm (200.79–232.28 in)
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)
On M-EX Right Now
JIS G4801 SUP10
3 active listings and RFQs →
JIS G4801 SUP9
4 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4801 SUP10 and JIS G4801 SUP9?
JIS G4801 SUP10 specifies V which is not specified for JIS G4801 SUP9.
Can JIS G4801 SUP10 be substituted with JIS G4801 SUP9?
JIS G4801 SUP10 and JIS G4801 SUP9 overlap closely enough on chemistry and mechanical properties that JIS G4801 SUP9 is often considered as a substitute for JIS G4801 SUP10 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.