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BS 970 EN56AM vs BS 970 (Part 1) 416S21

Close Alternative — 84.9% match based on chemical composition and mechanical property overlap.

BS 970 EN56AM (BS 970:1955) and BS 970 (Part 1) 416S21 (BS 970 (Part 1):1991) are both steel grades. Both fall under the Stainless Steel category. BS 970 EN56AM is typically used for suitable for 35/45 (p), 45/55 (r), 50/60 (s) tons/sq in., while BS 970 (Part 1) 416S21 is commonly used for ferritic and martensitic stainless and heat resisting steel (section five). BS 970 EN56AM is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 1) 416S21 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 EN56AM vs BS 970 (Part 1) 416S21 is a 84.9% 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 84.9%.

Frequently Compared With BS 970 EN56AM:
EN 10088-1 1.4006 ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 EN 10088-1 1.4301 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12Ni2Mo GOST 5632 06Kh23N28 IS 1570 (Part 7) 12Cr12MoVH
Match Breakdown
CHEMISTRY MATCH
84.9%
MECHANICAL MATCH
No shared data
OVERALL
84.9%
Specifications
Property BS 970 EN56AM BS 970 (Part 1) 416S21
Standard BS 970:1955 BS 970 (Part 1):1991
Category Stainless Steel Stainless Steel
C (%) <=0.12 0.09-0.15
Si (%) <=1.00 <=1.0
Mn (%) <=1.50 <=1.5
Ni (%) <=1.00 <=1.00
Cr (%) 12.0-14.0 11.5-13.5
Mo (%) <=0.60 <=0.60
S (%) <=0.75 0.15-0.35
Se (%) <=0.60 Not specified
Zr (%) <=0.60 Not specified
Pb (%) <=0.35 Not specified
P (%) <=0.045 <=0.060
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 EN56AM BS 970 (Part 1) 416S21
Tensile Strength ≥541 MPa (35 tons/sq in, converted) Not specified
Elongation ≥20% Not specified
Hardness 152-207 HB Not specified
Condition Hardened and tempered P, ruling section 6 in (lowest-strength condition of the standard) Not specified
Typical Applications
BS 970 EN56AM
Suitable for 35/45 (P), 45/55 (R), 50/60 (S) tons/sq in.
BS 970 (Part 1) 416S21
Ferritic and martensitic stainless and heat resisting steel (section five)
Key Differences
Can BS 970 EN56AM Be Substituted With BS 970 (Part 1) 416S21?
BS 970 EN56AM and BS 970 (Part 1) 416S21 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
BS 970 EN56AM
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BS 970 (Part 1) 416S21
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Frequently Asked Questions
What is the difference between BS 970 EN56AM and BS 970 (Part 1) 416S21?
BS 970 EN56AM specifies Se, Zr, Pb which are not specified for BS 970 (Part 1) 416S21.
Can BS 970 EN56AM be substituted with BS 970 (Part 1) 416S21?
BS 970 EN56AM and BS 970 (Part 1) 416S21 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.