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IS 3431 55Si7 vs EN 10089 50CrV4

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

IS 3431 55Si7 (IS 3431:1982) and EN 10089 50CrV4 (EN 10089:2002) are both steel grades. Both fall under the Spring Steel category. IS 3431 55Si7 is typically used for leaf springs,coil springs,automotive suspension springs,industrial springs,washer springs, while EN 10089 50CrV4 is commonly used for valve springs, high duty coil springs, hand tools. IS 3431 55Si7 is defined under Bureau of Indian Standards (IS), originating from India, while EN 10089 50CrV4 is defined under European Standard (EN), originating from Europe.

As per chemical composition, IS 3431 55Si7 vs EN 10089 50CrV4 is a 69.3% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With IS 3431 55Si7:
IS 3431 60Si7 IS 1570 (Part 4) 65Si7 IS 1570 (Part 4) 60Si7 IS 3195 50Cr4V2 IS 4367 55Si7 IS 3195 55Si7 IS 3195 113C6 IS 1570 (Part 4) 55Si7 IS 3431 65Si7 IS 3431 50Cr4V2 EN 10083-1 51CrV4 EN 10083-3 51CrV4
Match Breakdown
CHEMISTRY MATCH
69.3%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property IS 3431 55Si7 EN 10089 50CrV4
Standard IS 3431:1982 EN 10089:2002
Category Spring Steel Spring Steel
C (%) 0.50-0.60 0.47–0.55
Mn (%) 0.80-1.00 0.70–1.10
P (%) <=0.045 Not specified
S (%) <=0.045 Not specified
Si (%) 1.50-2.00 0.15–0.35
Cr (%) Not specified 0.90–1.20
V (%) Not specified 0.10–0.20
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 3431 55Si7 EN 10089 50CrV4
Core Hardness After Quenching >=54 HRC (oil, up to 20 mm round / 16 mm flat) Not specified
Elongation (quenched and tempered) >=6% Not specified
Hardness, soft annealed <=245 HB Not specified
Hardness, untreated (hot rolled) about 270 HB (reference value) Not specified
Tensile Strength (quenched and tempered) 1320-1570 MPa Not specified
Yield Stress (quenched and tempered) >=1130 MPa Not specified
Tensile Strength Not specified 1100–1300 MPa
Yield Strength Not specified ≥1000 MPa
Elongation Not specified ≥8%
Hardness Not specified 321–375 HB
Typical Applications
IS 3431 55Si7
leaf springs,coil springs,automotive suspension springs,industrial springs,washer springs
EN 10089 50CrV4
Valve springs, high duty coil springs, hand tools
Key Differences
Can IS 3431 55Si7 Be Substituted With EN 10089 50CrV4?
IS 3431 55Si7 and EN 10089 50CrV4 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 3431 55Si7
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 4500–7000 mm (177.17–275.59 in)
EN 10089 50CrV4
Round Bar → (3 listings)
Diameter: 30–30 mm (1.18–1.18 in)
Length: 5000–6500 mm (196.85–255.91 in)
On M-EX Right Now
IS 3431 55Si7
2 active listings and RFQs →
EN 10089 50CrV4
3 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 3431 55Si7 and EN 10089 50CrV4?
IS 3431 55Si7 specifies P, S which are not specified for EN 10089 50CrV4. EN 10089 50CrV4 specifies Cr, V which are not specified for IS 3431 55Si7.
Can IS 3431 55Si7 be substituted with EN 10089 50CrV4?
IS 3431 55Si7 and EN 10089 50CrV4 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.