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IS 1570 (Part 4) 38Cr4BT vs IS 11169 (Part 1) 40Cr4

Close Alternative — 79.4% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 38Cr4BT (IS 1570 (Part 4):1988) and IS 11169 (Part 1) 40Cr4 (IS 11169 (Part 1):1984) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 38Cr4BT is defined under Bureau of Indian Standards (IS), originating from India, while IS 11169 (Part 1) 40Cr4 is defined under Bureau of Indian Standards (IS), originating from India.

As per chemical composition, IS 1570 (Part 4) 38Cr4BT vs IS 11169 (Part 1) 40Cr4 is a 79.4% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a close alternative overall at 79.4%.

Frequently Compared With IS 1570 (Part 4) 38Cr4BT:
NF A35-565 100C6 IS 1570 (Part 4) 10Cr20Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Mo6 GOST 4543 12HN3A IS 1570 (Part 4) 07Cr4Mo6 GB/T 3077 12Cr2Ni4A IS 4367 07Cr4Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
79.4%
MECHANICAL MATCH
No shared data
OVERALL
79.4%
Specifications
Property IS 1570 (Part 4) 38Cr4BT IS 11169 (Part 1) 40Cr4
Standard IS 1570 (Part 4):1988 IS 11169 (Part 1):1984
Category Alloy Steel Alloy Steel
C (%) 0.35-0.40 0.35-0.45
Si (%) 0.15-0.30 0.10-0.35
Mn (%) 0.30-0.50 0.60-0.90
Cr (%) 0.95-1.15 0.90-1.20
B (%) 0.0005-0.003 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 IS 1570 (Part 4) 38Cr4BT IS 11169 (Part 1) 40Cr4
Tensile Strength (hardened and tempered) Not specified 1000-1200 MPa (16 mm) / 900-1180 MPa (40 mm) / 800-950 MPa (100 mm)
0.2% Proof Stress Not specified >=800 MPa (16 mm) / >=680 MPa (40 mm) / >=570 MPa (100 mm)
Elongation Not specified >=11% (16 mm) / >=12% (40 mm) / >=14% (100 mm)
Hardness, annealed Not specified <=200 HB
Typical Applications
IS 1570 (Part 4) 38Cr4BT
Not documented
IS 11169 (Part 1) 40Cr4
Cold heading and cold extrusion; the standard covers wires, wire rods and bars of 2 to 100 mm diameter (clause 1.1)
Key Differences
Can IS 1570 (Part 4) 38Cr4BT Be Substituted With IS 11169 (Part 1) 40Cr4?
IS 1570 (Part 4) 38Cr4BT and IS 11169 (Part 1) 40Cr4 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.
On M-EX Right Now
IS 1570 (Part 4) 38Cr4BT
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IS 11169 (Part 1) 40Cr4
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 38Cr4BT and IS 11169 (Part 1) 40Cr4?
IS 1570 (Part 4) 38Cr4BT specifies B which is not specified for IS 11169 (Part 1) 40Cr4.
Can IS 1570 (Part 4) 38Cr4BT be substituted with IS 11169 (Part 1) 40Cr4?
IS 1570 (Part 4) 38Cr4BT and IS 11169 (Part 1) 40Cr4 are a close alternative rather than a direct substitute. Some properties overlap well, but check the specific chemistry and mechanical rows above against your application's requirements before treating them as interchangeable.