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JIS G4801 SUP9A vs GB/T 1222 55CrMnA

Related Material — 60.4% match based on chemical composition and mechanical property overlap.

JIS G4801 SUP9A (JIS G 4801:2005) and GB/T 1222 55CrMnA (GB/T 1222-2016) are both steel grades. Both fall under the Spring Steel category. JIS G4801 SUP9A is typically used for heavy duty leaf springs, torsion bars, while GB/T 1222 55CrMnA is commonly used for automotive leaf springs, coil springs. JIS G4801 SUP9A is defined under Japanese Industrial Standards (JIS), originating from Japan, while GB/T 1222 55CrMnA is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, JIS G4801 SUP9A vs GB/T 1222 55CrMnA is a 90.5% match. As per mechanical properties, the match is 0%. Combined, this makes them a related material overall at 60.4%.

Frequently Compared With JIS G4801 SUP9A:
EN 10089 55Cr3 EN 10089 50CrV4 EN 10089 55Si7 EN 10083-3 51CrV4 IS 3195 50Cr4V2 IS 3195 60Cr4V2 IS 3195 113C6 IS 3431 50Cr4V2 EN 10083-1 51CrV4 EN 10083-1 51CrV4 IS 3195 52Cr4Mo2V IS 5517 55Cr3
Match Breakdown
CHEMISTRY MATCH
90.5%
MECHANICAL MATCH
0%
OVERALL
60.4%
Specifications
Property JIS G4801 SUP9A GB/T 1222 55CrMnA
Standard JIS G 4801:2005 GB/T 1222-2016
Category Spring Steel Spring Steel
C (%) 0.56–0.64 0.52–0.60
Mn (%) 0.70–1.00 0.70–1.00
Cr (%) 0.70–1.00 0.65–0.95
Si (%) 0.15–0.35 0.17–0.37
P (%) ≤0.030 Not specified
S (%) ≤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 SUP9A GB/T 1222 55CrMnA
Tensile Strength ≥1180 MPa ≥1225 MPa
Yield Strength ≥1030 MPa ≥1080 MPa
Elongation ≥7% ≥6%
Typical Applications
JIS G4801 SUP9A
Heavy duty leaf springs, torsion bars
GB/T 1222 55CrMnA
Automotive leaf springs, coil springs
Key Differences
Can JIS G4801 SUP9A Be Substituted With GB/T 1222 55CrMnA?
JIS G4801 SUP9A and GB/T 1222 55CrMnA 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 SUP9A
Round Bar → (2 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 3700–5500 mm (145.67–216.54 in)
GB/T 1222 55CrMnA
Round Bar → (2 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 5600–7000 mm (220.47–275.59 in)
On M-EX Right Now
JIS G4801 SUP9A
2 active listings and RFQs →
GB/T 1222 55CrMnA
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4801 SUP9A and GB/T 1222 55CrMnA?
JIS G4801 SUP9A specifies P, S which are not specified for GB/T 1222 55CrMnA.
Can JIS G4801 SUP9A be substituted with GB/T 1222 55CrMnA?
JIS G4801 SUP9A and GB/T 1222 55CrMnA 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.