Strong Match — 92.9% match
based on chemical composition and mechanical property overlap.
ASTM A276/A276M S30900 (ASTM A276/A276M:2017) and ASTM A959 309Cb (ASTM A959:2011) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A276/A276M S30900 is typically used for stainless steel bars and shapes (hot-finished or cold-finished), while ASTM A959 309Cb is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1).
ASTM A276/A276M S30900 is defined under ASTM International, originating from United States, while ASTM A959 309Cb is defined under ASTM International, originating from United States.
As per chemical composition, ASTM A276/A276M S30900 vs ASTM A959 309Cb is a 92.9% 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 92.9%.
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 S30900
ASTM A959 309Cb
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 S30900
Stainless steel bars and shapes (hot-finished or cold-finished)
ASTM A959 309Cb
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Can ASTM A276/A276M S30900 Be Substituted With ASTM A959 309Cb?
ASTM A276/A276M S30900 and ASTM A959 309Cb overlap closely enough on chemistry and mechanical properties that ASTM A959 309Cb is often considered as a substitute for ASTM A276/A276M S30900 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 ASTM A276/A276M S30900 and ASTM A959 309Cb?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A276/A276M S30900 be substituted with ASTM A959 309Cb?
ASTM A276/A276M S30900 and ASTM A959 309Cb overlap closely enough on chemistry and mechanical properties that ASTM A959 309Cb is often considered as a substitute for ASTM A276/A276M S30900 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.