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IS 1570 (Part 4) 20Mn5Cr5 vs GB/T 3077 12Cr2Ni4A

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

IS 1570 (Part 4) 20Mn5Cr5 (IS 1570 (Part 4):1988) and GB/T 3077 12Cr2Ni4A (GB/T 3077-2015) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 20Mn5Cr5 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 1570 (Part 4) 20Mn5Cr5 vs GB/T 3077 12Cr2Ni4A is a 64.5% match. As per mechanical properties, the match is 0%. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With IS 1570 (Part 4) 20Mn5Cr5:
NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 7) 10Mo6H IS 1570 (Part 7) 12Cr2Mo5V2H IS 1570 (Part 7) 12Cr4Mo5H IS 1570 (Part 4) 07Cr4Mo6
Match Breakdown
CHEMISTRY MATCH
64.5%
MECHANICAL MATCH
0%
OVERALL
35%
Specifications
Property IS 1570 (Part 4) 20Mn5Cr5 GB/T 3077 12Cr2Ni4A
Standard IS 1570 (Part 4):1988 GB/T 3077-2015
Category Alloy Steel Alloy Steel
C (%) 0.17-0.22 0.10-0.15
Si (%) 0.10-0.35 0.17-0.37
Mn (%) 1.00-1.40 0.30-0.60
Cr (%) 1.00-1.30 1.25-1.65
Ni (%) Not specified 3.25-3.75
P (%) Not specified 0.025 max
S (%) Not specified 0.025 max
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) 20Mn5Cr5 GB/T 3077 12Cr2Ni4A
Tensile Strength >=990 MPa 980-1180 MPa
Elongation >=8% 10-14%
Izod Impact >=38 J Not specified
Condition Case hardening steel, refined and quenched, core properties Not specified
Yield Strength Not specified 785-980 MPa
Hardness Not specified 58-62 HRC (case)
Typical Applications
IS 1570 (Part 4) 20Mn5Cr5
Not documented
GB/T 3077 12Cr2Ni4A
Used for gears, shafts, pinions, aircraft parts, heavy-duty bearings, and transmission components.
Key Differences
Can IS 1570 (Part 4) 20Mn5Cr5 Be Substituted With GB/T 3077 12Cr2Ni4A?
IS 1570 (Part 4) 20Mn5Cr5 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 1570 (Part 4) 20Mn5Cr5
No active listings currently.
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 1570 (Part 4) 20Mn5Cr5
0 active listings and RFQs →
GB/T 3077 12Cr2Ni4A
2 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 20Mn5Cr5 and GB/T 3077 12Cr2Ni4A?
GB/T 3077 12Cr2Ni4A specifies Ni, P, S which are not specified for IS 1570 (Part 4) 20Mn5Cr5.
Can IS 1570 (Part 4) 20Mn5Cr5 be substituted with GB/T 3077 12Cr2Ni4A?
IS 1570 (Part 4) 20Mn5Cr5 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.