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BS 970 EN41A vs BS 970 EN29B

Close Alternative — 77.2% match based on chemical composition and mechanical property overlap.

BS 970 EN41A (BS 970:1955) and BS 970 EN29B (BS 970:1955) are both steel grades. Both fall under the Alloy Steel category. BS 970 EN41A is defined under British Standards (BS), originating from United Kingdom, while BS 970 EN29B is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN41A vs BS 970 EN29B is a 78.4% match. As per mechanical properties, the match is 75%. Combined, this makes them a close alternative overall at 77.2%.

Frequently Compared With BS 970 EN41A:
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 IS 1570 (Part 4) 10Mo6 IS 1570 (Part 7) 10Mo6H
Match Breakdown
CHEMISTRY MATCH
78.4%
MECHANICAL MATCH
75%
OVERALL
77.2%
Specifications
Property BS 970 EN41A BS 970 EN29B
Standard BS 970:1955 BS 970:1955
Category Alloy Steel Alloy Steel
C (%) 0.25-0.35 0.25-0.35
Si (%) 0.10-0.45 0.10-0.35
Mn (%) <=0.65 <=0.65
Ni (%) <=0.40 <=0.40
Cr (%) 1.40-1.80 2.50-3.50
Mo (%) 0.10-0.25 0.30-0.70
Al (%) 0.90-1.30 Not specified
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 EN41A BS 970 EN29B
Tensile Strength ≥695 MPa (45 tons/sq in, converted) ≥695 MPa (45 tons/sq in, converted)
Yield Strength ≥525 MPa (34 tons/sq in, converted) ≥525 MPa (34 tons/sq in, converted)
Elongation ≥20% ≥22%
Hardness 201-255 HB 201-255 HB
Condition Hardened and tempered R, ruling section 6 in (lowest-strength condition of the standard) Hardened and tempered R, ruling section 6 in (lowest-strength condition of the standard)
Typical Applications
BS 970 EN41A
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) tons/sq in; selection of En 41A or 41B governed by tensile range required.
BS 970 EN29B
Not documented
Key Differences
Can BS 970 EN41A Be Substituted With BS 970 EN29B?
BS 970 EN41A and BS 970 EN29B 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.
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BS 970 EN41A
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BS 970 EN29B
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Frequently Asked Questions
What is the difference between BS 970 EN41A and BS 970 EN29B?
BS 970 EN41A specifies Al which is not specified for BS 970 EN29B.
Can BS 970 EN41A be substituted with BS 970 EN29B?
BS 970 EN41A and BS 970 EN29B 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.