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ASTM A276/A276M S32100 vs BS 970 (Part 3) 321S31

Strong Match — 94.8% match based on chemical composition and mechanical property overlap.

ASTM A276/A276M S32100 (ASTM A276/A276M:2017) and BS 970 (Part 3) 321S31 (BS 970 (Part 3):1991) are both steel grades. Both fall under the Stainless Steel category. ASTM A276/A276M S32100 is typically used for stainless steel bars and shapes (hot-finished or cold-finished), while BS 970 (Part 3) 321S31 is commonly used for bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (table 18). ASTM A276/A276M S32100 is defined under ASTM International, originating from United States, while BS 970 (Part 3) 321S31 is defined under British Standards (BS), originating from United Kingdom.

As per chemical composition, ASTM A276/A276M S32100 vs BS 970 (Part 3) 321S31 is a 94.8% 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 94.8%.

Frequently Compared With ASTM A276/A276M S32100:
GOST 5632 06Kh23N28 GOST 5632 08X18H10 IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr13H ASTM A959 .- EN 10088-1 1.4006 EN 10088-1 1.4301 IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoVH GB/T 3280 06Cr19Ni10 EN 10088-1 1.4401 EN 10088-1 1.4845
Match Breakdown
CHEMISTRY MATCH
94.8%
MECHANICAL MATCH
No shared data
OVERALL
94.8%
Specifications
Property ASTM A276/A276M S32100 BS 970 (Part 3) 321S31
Standard ASTM A276/A276M:2017 BS 970 (Part 3):1991
Category Stainless Steel Stainless Steel
C (%) <=0.08 <=0.08
Mn (%) <=2.00 <=2.0
P (%) <=0.045 <=0.045
S (%) <=0.030 <=0.030
Si (%) <=1.00 <=1.0
Cr (%) 17.0-19.0 17.0-19.0
Ni (%) 9.0-12.0 9.0-12.0
Ti (%) <=0.70 Not specified
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property ASTM A276/A276M S32100 BS 970 (Part 3) 321S31
Tensile Strength >=515 MPa Not specified
Yield Strength >=205 MPa Not specified
Elongation >=40% Not specified
Condition Condition A (Annealed), hot-finished, all sizes (first row printed) Not specified
Typical Applications
ASTM A276/A276M S32100
Stainless steel bars and shapes (hot-finished or cold-finished)
BS 970 (Part 3) 321S31
Bright cold finished bars (cold drawn, turned or precision ground) for general engineering purposes, in straight lengths; austenitic stainless and heat resisting steel (Table 18)
Key Differences
Can ASTM A276/A276M S32100 Be Substituted With BS 970 (Part 3) 321S31?
ASTM A276/A276M S32100 and BS 970 (Part 3) 321S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 321S31 is often considered as a substitute for ASTM A276/A276M S32100 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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ASTM A276/A276M S32100
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BS 970 (Part 3) 321S31
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Frequently Asked Questions
What is the difference between ASTM A276/A276M S32100 and BS 970 (Part 3) 321S31?
ASTM A276/A276M S32100 specifies Ti which is not specified for BS 970 (Part 3) 321S31.
Can ASTM A276/A276M S32100 be substituted with BS 970 (Part 3) 321S31?
ASTM A276/A276M S32100 and BS 970 (Part 3) 321S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 3) 321S31 is often considered as a substitute for ASTM A276/A276M S32100 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.