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

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

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

As per chemical composition, IS 1570 (Part 4) 55Si7 vs GB/T 1222 55CrMnA 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 IS 1570 (Part 4) 55Si7:
IS 1570 (Part 4) 60Si7 IS 3431 60Si7 EN 10089 55Si7 IS 3431 55Si7 IS 3195 55Si7 EN 10089 50CrV4 EN 10083-3 51CrV4 IS 4367 55Si7 IS 1570 (Part 4) 65Si7 EN 10089 55Cr3 IS 3195 113C6 IS 3195 60Si7
Match Breakdown
CHEMISTRY MATCH
79.8%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property IS 1570 (Part 4) 55Si7 GB/T 1222 55CrMnA
Standard IS 1570 (Part 4):1988 GB/T 1222-2016
Category Spring Steel Spring Steel
C (%) 0.50-0.60 0.52–0.60
Si (%) 1.50-2.00 0.17–0.37
Mn (%) 0.80-1.00 0.70–1.00
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 IS 1570 (Part 4) 55Si7 GB/T 1222 55CrMnA
Tensile Strength Not specified ≥1225 MPa
Yield Strength Not specified ≥1080 MPa
Elongation Not specified ≥6%
Typical Applications
IS 1570 (Part 4) 55Si7
Not documented
GB/T 1222 55CrMnA
Automotive leaf springs, coil springs
Key Differences
Can IS 1570 (Part 4) 55Si7 Be Substituted With GB/T 1222 55CrMnA?
IS 1570 (Part 4) 55Si7 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
IS 1570 (Part 4) 55Si7
No active listings currently.
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
IS 1570 (Part 4) 55Si7
0 active listings and RFQs →
GB/T 1222 55CrMnA
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 55Si7 and GB/T 1222 55CrMnA?
GB/T 1222 55CrMnA specifies Cr which is not specified for IS 1570 (Part 4) 55Si7.
Can IS 1570 (Part 4) 55Si7 be substituted with GB/T 1222 55CrMnA?
IS 1570 (Part 4) 55Si7 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.