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IS 4367 21Cr4Mo2 vs GB/T 3077 12Cr2Ni4A

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

IS 4367 21Cr4Mo2 (IS 4367:1991) and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) are both steel grades. Both fall under the Alloy Steel category. IS 4367 21Cr4Mo2 is typically used for gears, shafts, studs, bolts, automotive transmission components, high-strength fasteners., while GB/T 3077 12Cr2Ni4A is commonly used for used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.. IS 4367 21Cr4Mo2 is defined under Bureau of Indian Standards (IS), originating from India, while GB/T 3077 12Cr2Ni4A is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, IS 4367 21Cr4Mo2 vs GB/T 3077 12Cr2Ni4A is a 59.3% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With IS 4367 21Cr4Mo2:
NF A35-565 100C6 UNI 11234 100Cr6 GOST 4543 12HN3A IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
59.3%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property IS 4367 21Cr4Mo2 GB/T 3077 12Cr2Ni4A
Standard IS 4367:1991 GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) <=0.26 0.10-0.15
Si (%) 0.10-0.35 0.17-0.37
Mn (%) 0.50-0.80 0.30-0.60
Cr (%) 0.90-1.20 1.25-1.65
Mo (%) 0.15-0.30 Not specified
S (%) <=0.035 0.025 max
P (%) <=0.035 0.025 max
Ni (%) Not specified 3.25-3.75
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 4367 21Cr4Mo2 GB/T 3077 12Cr2Ni4A
Tensile Strength 650-800 MPa 980-1180 MPa
Yield Strength 420 MPa min 785-980 MPa
Elongation >=16% 10-14%
Izod Impact 60 J min Not specified
Hardness 190-235 HB 58-62 HRC (case)
Hardness (soft annealed) <=210 HB Not specified
Condition Hardened and tempered, ruling section up to 150 mm Not specified
Typical Applications
IS 4367 21Cr4Mo2
Gears, shafts, studs, bolts, automotive transmission components, high-strength fasteners.
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can IS 4367 21Cr4Mo2 Be Substituted With GB/T 3077 12Cr2Ni4A?
IS 4367 21Cr4Mo2 and GB/T 3077 12Cr2Ni4A 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 4367 21Cr4Mo2
Round Bar → (4 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5400–7000 mm (212.6–275.59 in)
GB/T 3077 12Cr2Ni4A
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6600 mm (196.85–259.84 in)
On M-EX Right Now
IS 4367 21Cr4Mo2
4 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 4367 21Cr4Mo2 and GB/T 3077 12Cr2Ni4A?
IS 4367 21Cr4Mo2 specifies Mo which is not specified for GB/T 3077 12Cr2Ni4A. GB/T 3077 12Cr2Ni4A specifies Ni which is not specified for IS 4367 21Cr4Mo2.
Can IS 4367 21Cr4Mo2 be substituted with GB/T 3077 12Cr2Ni4A?
IS 4367 21Cr4Mo2 and GB/T 3077 12Cr2Ni4A 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.