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ASTM A959 S41026 vs BS 970 (Part 1) 416S21

Close Alternative — 72.1% match based on chemical composition and mechanical property overlap.

ASTM A959 S41026 (ASTM A959:2011) and BS 970 (Part 1) 416S21 (BS 970 (Part 1):1983) are both steel grades. Both fall under the Stainless Steel category. ASTM A959 S41026 is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while BS 970 (Part 1) 416S21 is commonly used for stainless and heat resisting steel for mechanical and allied engineering purposes (table 13).. ASTM A959 S41026 is defined under ASTM International, originating from United States, while BS 970 (Part 1) 416S21 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, ASTM A959 S41026 vs BS 970 (Part 1) 416S21 is a 72.1% 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 72.1%.

Frequently Compared With ASTM A959 S41026:
IS 1570 (Part 7) 12Cr12MoH ASTM A959 .- GB/T 3280 06Cr19Ni10 EN 10088-1 1.4301 EN 10088-1 1.4006 EN 10088-1 1.4401 IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4845 IS 1570 (Part 7) 11Cr17Ni13W3TiH
Match Breakdown
CHEMISTRY MATCH
72.1%
MECHANICAL MATCH
No shared data
OVERALL
72.1%
Specifications
Property ASTM A959 S41026 BS 970 (Part 1) 416S21
Standard ASTM A959:2011 BS 970 (Part 1):1983
Category Stainless Steel Stainless Steel
C (%) <=0.15 0.09-0.15
Cr (%) 11.5-13.5 11.5-13.5
Cu (%) <=0.50 Not specified
Mn (%) <=1.00 <=1.5
Mo (%) 0.40-0.60 <=0.60
Ni (%) 1.00-2.00 <=1.00
P (%) <=0.02 <=0.060
S (%) <=0.02 0.15-0.35
Si (%) <=1.00 <=1.0
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Typical Applications
ASTM A959 S41026
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
BS 970 (Part 1) 416S21
Stainless and heat resisting steel for mechanical and allied engineering purposes (Table 13).
Key Differences
Can ASTM A959 S41026 Be Substituted With BS 970 (Part 1) 416S21?
ASTM A959 S41026 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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ASTM A959 S41026
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BS 970 (Part 1) 416S21
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Frequently Asked Questions
What is the difference between ASTM A959 S41026 and BS 970 (Part 1) 416S21?
ASTM A959 S41026 specifies Cu which is not specified for BS 970 (Part 1) 416S21.
Can ASTM A959 S41026 be substituted with BS 970 (Part 1) 416S21?
ASTM A959 S41026 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.