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GB/T 1222 55CrMnA vs IS 1570 (Part 4) 55Si7

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

GB/T 1222 55CrMnA (GB/T 1222-2016) and IS 1570 (Part 4) 55Si7 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Spring Steel category. GB/T 1222 55CrMnA is defined under Guobiao Standards (GB/T), originating from China, while IS 1570 (Part 4) 55Si7 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, GB/T 1222 55CrMnA vs IS 1570 (Part 4) 55Si7 is a 79.8% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With GB/T 1222 55CrMnA:
EN 10089 55Cr3 EN 10089 55Si7 EN 10089 50CrV4 EN 10083-3 51CrV4 IS 5517 55Cr3 IS 3431 60Cr4V2 IS 3195 60Cr4V2 IS 3195 50Cr4V2 IS 3195 52Cr4Mo2V IS 4367 55Si7 IS 3195 60Si7 BS 970 EN42B
Match Breakdown
CHEMISTRY MATCH
79.8%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property GB/T 1222 55CrMnA IS 1570 (Part 4) 55Si7
Standard GB/T 1222-2016 IS 1570 (Part 4):1988
Category Spring Steel Spring Steel
C (%) 0.52–0.60 0.50-0.60
Si (%) 0.17–0.37 1.50-2.00
Mn (%) 0.70–1.00 0.80-1.00
Cr (%) 0.65–0.95 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 GB/T 1222 55CrMnA IS 1570 (Part 4) 55Si7
Tensile Strength ≥1225 MPa Not specified
Yield Strength ≥1080 MPa Not specified
Elongation ≥6% Not specified
Typical Applications
GB/T 1222 55CrMnA
Automotive leaf springs, coil springs
IS 1570 (Part 4) 55Si7
Not documented
Key Differences
Can GB/T 1222 55CrMnA Be Substituted With IS 1570 (Part 4) 55Si7?
GB/T 1222 55CrMnA and IS 1570 (Part 4) 55Si7 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
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)
IS 1570 (Part 4) 55Si7
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On M-EX Right Now
GB/T 1222 55CrMnA
2 active listings and RFQs →
IS 1570 (Part 4) 55Si7
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Frequently Asked Questions
What is the difference between GB/T 1222 55CrMnA and IS 1570 (Part 4) 55Si7?
GB/T 1222 55CrMnA specifies Cr which is not specified for IS 1570 (Part 4) 55Si7.
Can GB/T 1222 55CrMnA be substituted with IS 1570 (Part 4) 55Si7?
GB/T 1222 55CrMnA and IS 1570 (Part 4) 55Si7 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.