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IS 1570 (Part 4) 35C8BT vs BS 970 EN18B

Close Alternative — 79.6% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 4) 35C8BT (IS 1570 (Part 4):1988) and BS 970 EN18B (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. IS 1570 (Part 4) 35C8BT is defined under Bureau of Indian Standards (IS), originating from India, while BS 970 EN18B is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 35C8BT vs BS 970 EN18B is a 79.6% 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 79.6%.

Frequently Compared With IS 1570 (Part 4) 35C8BT:
IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 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 4367 10Cr9Mo10 EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Mo6
Match Breakdown
CHEMISTRY MATCH
79.6%
MECHANICAL MATCH
No shared data
OVERALL
79.6%
Specifications
Property IS 1570 (Part 4) 35C8BT BS 970 EN18B
Standard IS 1570 (Part 4):1988 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.31-0.36 0.30-0.35
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.60-1.00 0.65-0.80
Cr (%) 0.10-0.30 0.85-1.15
B (%) 0.0005-0.003 Not specified
S (%) Not specified <=0.050
P (%) Not specified <=0.050
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) 35C8BT BS 970 EN18B
Tensile Strength Not specified ≥695 MPa (45 tons/sq in, converted)
Yield Strength Not specified ≥525 MPa (34 tons/sq in, converted)
Elongation Not specified ≥22%
Hardness Not specified 201-255 HB
Condition Not specified Hardened and tempered R, ruling section 4 in (lowest-strength condition of the standard)
Key Differences
Can IS 1570 (Part 4) 35C8BT Be Substituted With BS 970 EN18B?
IS 1570 (Part 4) 35C8BT and BS 970 EN18B 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) 35C8BT
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BS 970 EN18B
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Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 35C8BT and BS 970 EN18B?
IS 1570 (Part 4) 35C8BT specifies B which is not specified for BS 970 EN18B. BS 970 EN18B specifies S, P which are not specified for IS 1570 (Part 4) 35C8BT.
Can IS 1570 (Part 4) 35C8BT be substituted with BS 970 EN18B?
IS 1570 (Part 4) 35C8BT and BS 970 EN18B 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.