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BS 970 (Part 1) 416S21 vs BS 970 (Part 3) 416S21

Strong Match — 100% match based on chemical composition and mechanical property overlap.

BS 970 (Part 1) 416S21 (BS 970 (Part 1):1991) and BS 970 (Part 3) 416S21 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. BS 970 (Part 1) 416S21 is typically used for ferritic and martensitic stainless and heat resisting steel (section five), while BS 970 (Part 3) 416S21 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (table 17). BS 970 (Part 1) 416S21 is defined under British Standards (BS), originating from United Kingdom, while BS 970 (Part 3) 416S21 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, BS 970 (Part 1) 416S21 vs BS 970 (Part 3) 416S21 is a 100% 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 100%.

Frequently Compared With BS 970 (Part 1) 416S21:
IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12MoH EN 10088-1 1.4401 GOST 5632 06Kh23N28 IS 1570 (Part 7) 12Cr13H ASTM A959 .- GB/T 3280 06Cr19Ni10 GOST 5632 08X18H10 EN 10088-1 1.4006 EN 10088-1 1.4301 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH
Match Breakdown
CHEMISTRY MATCH
100%
MECHANICAL MATCH
No shared data
OVERALL
100%
Specifications
Property BS 970 (Part 1) 416S21 BS 970 (Part 3) 416S21
Standard BS 970 (Part 1):1991 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) 0.09-0.15 0.09-0.15
Si (%) <=1.0 <=1.0
Mn (%) <=1.5 <=1.5
P (%) <=0.060 <=0.060
S (%) 0.15-0.35 0.15-0.35
Cr (%) 11.5-13.5 11.5-13.5
Mo (%) <=0.60 <=0.60
Ni (%) <=1.00 <=1.00
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
BS 970 (Part 1) 416S21
Ferritic and martensitic stainless and heat resisting steel (section five)
BS 970 (Part 3) 416S21
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; martensitic stainless steel (Table 17)
Can BS 970 (Part 1) 416S21 Be Substituted With BS 970 (Part 3) 416S21?
BS 970 (Part 1) 416S21 and BS 970 (Part 3) 416S21 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 416S21 is often considered as a substitute for BS 970 (Part 1) 416S21 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 (Part 1) 416S21
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BS 970 (Part 3) 416S21
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Frequently Asked Questions
What is the difference between BS 970 (Part 1) 416S21 and BS 970 (Part 3) 416S21?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 416S21 be substituted with BS 970 (Part 3) 416S21?
BS 970 (Part 1) 416S21 and BS 970 (Part 3) 416S21 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 416S21 is often considered as a substitute for BS 970 (Part 1) 416S21 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.