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BS 970 EN111 vs BS 970 EN111A

Strong Match — 95.7% match based on chemical composition and mechanical property overlap.

BS 970 EN111 (BS 970:1955) and BS 970 EN111A (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN111 is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN111A is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN111 vs BS 970 EN111A is a 95.7% 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 95.7%.

Frequently Compared With BS 970 EN111:
IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H IS 11169 (Part 1) 10Ni5Cr4 IS 4367 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4
Match Breakdown
CHEMISTRY MATCH
95.7%
MECHANICAL MATCH
No shared data
OVERALL
95.7%
Specifications
Property BS 970 EN111 BS 970 EN111A
Standard BS 970:1955 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.30-0.40 0.33-0.38
Si (%) 0.10-0.35 0.10-0.35
Mn (%) 0.60-0.90 0.60-0.90
Ni (%) 1.00-1.50 1.00-1.50
Cr (%) 0.45-0.75 0.45-0.75
S (%) <=0.050 <=0.050
P (%) <=0.050 <=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 BS 970 EN111 BS 970 EN111A
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 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN111
Bars and billets for forging; forgings and drop-forgings; bars for machining; bright bars. Suitable for 45/55 (R), 50/60 (S), 55/65 (T), 60/70 (U) tons/sq in according to ruling section.
BS 970 EN111A
Not documented
Can BS 970 EN111 Be Substituted With BS 970 EN111A?
BS 970 EN111 and BS 970 EN111A overlap closely enough on chemistry and mechanical properties that BS 970 EN111A is often considered as a substitute for BS 970 EN111 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 EN111
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BS 970 EN111A
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Frequently Asked Questions
What is the difference between BS 970 EN111 and BS 970 EN111A?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 EN111 be substituted with BS 970 EN111A?
BS 970 EN111 and BS 970 EN111A overlap closely enough on chemistry and mechanical properties that BS 970 EN111A is often considered as a substitute for BS 970 EN111 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.