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BS 970 EN56DM vs BS 970 (Part 1) 416S21

Close Alternative — 83.2% match based on chemical composition and mechanical property overlap.

BS 970 EN56DM (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 EN56DM 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 EN56DM vs BS 970 (Part 1) 416S21 is a 83.2% 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 83.2%.

Frequently Compared With BS 970 EN56DM:
GOST 5632 08X18H10 EN 10088-1 1.4301 IS 1570 (Part 7) 11Cr17Ni13W3TiH GB/T 3280 06Cr19Ni10 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo ASTM A959 .- GOST 5632 06Kh23N28 EN 10088-1 1.4006 EN 10088-1 1.4401 EN 10088-1 1.4845
Match Breakdown
CHEMISTRY MATCH
83.2%
MECHANICAL MATCH
No shared data
OVERALL
83.2%
Specifications
Property BS 970 EN56DM BS 970 (Part 1) 416S21
Standard BS 970:1955 BS 970 (Part 1):1991
Category Stainless Steel Stainless Steel
C (%) 0.25-0.35 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 EN56DM 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 EN56DM
Not documented
BS 970 (Part 1) 416S21
Ferritic and martensitic stainless and heat resisting steel (section five)
Key Differences
Can BS 970 EN56DM Be Substituted With BS 970 (Part 1) 416S21?
BS 970 EN56DM 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.
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BS 970 EN56DM
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BS 970 (Part 1) 416S21
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Frequently Asked Questions
What is the difference between BS 970 EN56DM and BS 970 (Part 1) 416S21?
BS 970 EN56DM specifies Se, Zr, Pb which are not specified for BS 970 (Part 1) 416S21.
Can BS 970 EN56DM be substituted with BS 970 (Part 1) 416S21?
BS 970 EN56DM 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.