Strong Match — 92.8% match
based on chemical composition and mechanical property overlap.
KS D3566 STS304 (KS D3566:2021) and ASTM A959 XM-21 (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
KS D3566 STS304 is typically used for chemical equipment, food processing machinery, kitchen equipment, architectural applications, storage tanks., while ASTM A959 XM-21 is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
KS D3566 STS304 is defined under Korean Industrial Standards (KS), originating from South Korea, while ASTM A959 XM-21 is defined under ASTM International, originating from United States.
As per chemical composition, KS D3566 STS304 vs ASTM A959 XM-21 is a 92.8% 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 92.8%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
ASTM A959 XM-21 specifies N which is not specified for KS D3566 STS304.
Can KS D3566 STS304 Be Substituted With ASTM A959 XM-21?
KS D3566 STS304 and ASTM A959 XM-21 overlap closely enough on chemistry and mechanical properties that ASTM A959 XM-21 is often considered as a substitute for KS D3566 STS304 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.
What is the difference between KS D3566 STS304 and ASTM A959 XM-21?
ASTM A959 XM-21 specifies N which is not specified for KS D3566 STS304.
Can KS D3566 STS304 be substituted with ASTM A959 XM-21?
KS D3566 STS304 and ASTM A959 XM-21 overlap closely enough on chemistry and mechanical properties that ASTM A959 XM-21 is often considered as a substitute for KS D3566 STS304 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.