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BS 970 EN18D vs BS 970 (Part 1) 530A40

Strong Match — 89% match based on chemical composition and mechanical property overlap.

BS 970 EN18D (BS 970:1955) and BS 970 (Part 1) 530A40 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN18D is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 530A40 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN18D vs BS 970 (Part 1) 530A40 is a 89% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a strong match overall at 89%.

Frequently Compared With BS 970 EN18D:
IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 7) 10Cr36Mo10H IS 4367 07Cr4Mo6 IS 1570 (Part 4) 07Cr4Mo6 NF A35-565 100C6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 10Cr20Mo6 IS 4367 10Cr9Mo10 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
89%
MECHANICAL MATCH
No shared data
OVERALL
89%
Specifications
Property BS 970 EN18D BS 970 (Part 1) 530A40
Standard BS 970:1955 BS 970 (Part 1):1983
Category Alloy Steel Alloy Steel
C (%) 0.38-0.43 0.38-0.43
Si (%) 0.10-0.35 Not specified
Mn (%) 0.65-0.80 0.60-0.80
Cr (%) 0.85-1.15 0.90-1.20
S (%) <=0.050 <=0.040
P (%) <=0.050 <=0.035
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property BS 970 EN18D BS 970 (Part 1) 530A40
Tensile Strength ≥695 MPa (45 tons/sq in, converted) Not specified
Yield Strength ≥525 MPa (34 tons/sq in, converted) Not specified
Elongation ≥22% Not specified
Hardness 201-255 HB Not specified
Condition Hardened and tempered R, ruling section 4 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN18D
Not documented
BS 970 (Part 1) 530A40
Through hardening steel for mechanical and allied engineering purposes; supplied in the hardened and tempered conditions of Table 6.
Key Differences
Can BS 970 EN18D Be Substituted With BS 970 (Part 1) 530A40?
BS 970 EN18D and BS 970 (Part 1) 530A40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 530A40 is often considered as a substitute for BS 970 EN18D in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
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BS 970 EN18D
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BS 970 (Part 1) 530A40
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Frequently Asked Questions
What is the difference between BS 970 EN18D and BS 970 (Part 1) 530A40?
BS 970 EN18D specifies Si which is not specified for BS 970 (Part 1) 530A40.
Can BS 970 EN18D be substituted with BS 970 (Part 1) 530A40?
BS 970 EN18D and BS 970 (Part 1) 530A40 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 530A40 is often considered as a substitute for BS 970 EN18D in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.