Post Stock Login Register

IS 1570 (Part 4) 38Cr4BT vs BS 970 EN18

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

IS 1570 (Part 4) 38Cr4BT (IS 1570 (Part 4):1988) and BS 970 EN18 (BS 970:1955) 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 BS 970 EN18 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, IS 1570 (Part 4) 38Cr4BT vs BS 970 EN18 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 BS 970 EN18
Standard IS 1570 (Part 4):1988 BS 970:1955
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 0.60-0.95
Cr (%) 0.95-1.15 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) 38Cr4BT BS 970 EN18
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)
Typical Applications
IS 1570 (Part 4) 38Cr4BT
Not documented
BS 970 EN18
Gears, shafts, high tensile fasteners
Key Differences
Can IS 1570 (Part 4) 38Cr4BT Be Substituted With BS 970 EN18?
IS 1570 (Part 4) 38Cr4BT and BS 970 EN18 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.
Forms & Sizes Available on M-EX
IS 1570 (Part 4) 38Cr4BT
No active listings currently.
BS 970 EN18
Hex Bar → (3 listings)
Across Flats: 50–50 mm (1.97–1.97 in)
Length: 2500–2900 mm (98.43–114.17 in)
Round Bar → (3 listings)
Diameter: 50–50 mm (1.97–1.97 in)
Length: 5000–6800 mm (196.85–267.72 in)
On M-EX Right Now
IS 1570 (Part 4) 38Cr4BT
0 active listings and RFQs →
BS 970 EN18
6 active listings and RFQs →
Frequently Asked Questions
What is the difference between IS 1570 (Part 4) 38Cr4BT and BS 970 EN18?
IS 1570 (Part 4) 38Cr4BT specifies B which is not specified for BS 970 EN18. BS 970 EN18 specifies S, P which are not specified for IS 1570 (Part 4) 38Cr4BT.
Can IS 1570 (Part 4) 38Cr4BT be substituted with BS 970 EN18?
IS 1570 (Part 4) 38Cr4BT and BS 970 EN18 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.