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JIS G4801 SUP6 vs GB/T 1222 55CrMnA

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

JIS G4801 SUP6 (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 SUP6 is typically used for automotive suspension springs, leaf springs, while GB/T 1222 55CrMnA is commonly used for automotive leaf springs, coil springs. JIS G4801 SUP6 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 SUP6 vs GB/T 1222 55CrMnA is a 77.8% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With JIS G4801 SUP6:
EN 10089 55Si7 EN 10089 55Cr3 EN 10089 50CrV4 EN 10083-3 51CrV4 IS 3431 60Si7 IS 1570 (Part 4) 55Si7 IS 1570 (Part 4) 60Si7 IS 1570 (Part 4) 65Si7 IS 3195 113C6 BS 970 EN42C IS 3431 50Cr4V2 BS 970 EN42
Match Breakdown
CHEMISTRY MATCH
77.8%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property JIS G4801 SUP6 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
Si (%) 1.50–1.80 0.17–0.37
Mn (%) 0.70–1.00 0.70–1.00
S (%) ≤0.030 Not specified
P (%) ≤0.030 Not specified
Cr (%) Not specified 0.65–0.95
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 GB/T 1222 55CrMnA
Tensile Strength ≥1130 MPa ≥1225 MPa
Yield Strength ≥980 MPa ≥1080 MPa
Elongation ≥7% ≥6%
Hardness 341–415 HB Not specified
Typical Applications
JIS G4801 SUP6
Automotive suspension springs, leaf springs
GB/T 1222 55CrMnA
Automotive leaf springs, coil springs
Key Differences
Can JIS G4801 SUP6 Be Substituted With GB/T 1222 55CrMnA?
JIS G4801 SUP6 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 SUP6
Round Bar → (2 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 4500–5700 mm (177.17–224.41 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 SUP6
2 active listings and RFQs →
GB/T 1222 55CrMnA
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between JIS G4801 SUP6 and GB/T 1222 55CrMnA?
JIS G4801 SUP6 specifies S, P which are not specified for GB/T 1222 55CrMnA. GB/T 1222 55CrMnA specifies Cr which is not specified for JIS G4801 SUP6.
Can JIS G4801 SUP6 be substituted with GB/T 1222 55CrMnA?
JIS G4801 SUP6 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.