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GB/T 3077 40Cr vs IS 1570 (Part 4) 103Cr4

Related Material — 69.9% match based on chemical composition and mechanical property overlap.

GB/T 3077 40Cr (GB/T 3077:2015) and IS 1570 (Part 4) 103Cr4 (IS 1570 (Part 4):1988) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 40Cr is defined under Guobiao Standards (GB/T), originating from China, while IS 1570 (Part 4) 103Cr4 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, GB/T 3077 40Cr vs IS 1570 (Part 4) 103Cr4 is a 74.9% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a related material overall at 69.9%.

Frequently Compared With GB/T 3077 40Cr:
UNI 11234 100Cr6 NF A35-565 100C6 GB/T 3077 12Cr2Ni4A GOST 4543 12HN3A IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 07Cr4Mo6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Cr20Mo6 IS 4367 07Cr4Mo6 IS 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10
Match Breakdown
CHEMISTRY MATCH
74.9%
MECHANICAL MATCH
No shared data
OVERALL
69.9%
Specifications
Property GB/T 3077 40Cr IS 1570 (Part 4) 103Cr4
Standard GB/T 3077:2015 IS 1570 (Part 4):1988
Category Alloy Steel Alloy Steel
C (%) 0.37-0.44 0.95-1.10
Si (%) 0.17-0.37 0.10-0.35
Mn (%) 0.50-0.80 0.25-0.45
Cr (%) 0.80-1.10 0.90-1.20
P (%) <=0.030 Not specified
S (%) <=0.030 Not specified
Cu (%) <=0.30 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 3077 40Cr IS 1570 (Part 4) 103Cr4
Tensile Strength >=980 MPa Not specified
Yield Strength >=785 MPa Not specified
Elongation >=9% Not specified
Hardness <=207 HB Not specified
Condition Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered Not specified
Typical Applications
GB/T 3077 40Cr
shafts, gears, bolts, spindles, connecting rods, machine parts
IS 1570 (Part 4) 103Cr4
Not documented
Key Differences
Can GB/T 3077 40Cr Be Substituted With IS 1570 (Part 4) 103Cr4?
GB/T 3077 40Cr and IS 1570 (Part 4) 103Cr4 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 3077 40Cr
Round Bar → (2 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5200–5900 mm (204.72–232.28 in)
IS 1570 (Part 4) 103Cr4
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On M-EX Right Now
GB/T 3077 40Cr
2 active listings and RFQs →
IS 1570 (Part 4) 103Cr4
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Frequently Asked Questions
What is the difference between GB/T 3077 40Cr and IS 1570 (Part 4) 103Cr4?
GB/T 3077 40Cr specifies P, S, Cu which are not specified for IS 1570 (Part 4) 103Cr4.
Can GB/T 3077 40Cr be substituted with IS 1570 (Part 4) 103Cr4?
GB/T 3077 40Cr and IS 1570 (Part 4) 103Cr4 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.