Strong Match — 94.2% match
based on chemical composition and mechanical property overlap.
ASTM A959 309H (ASTM A959:2011) and ASTM A276/A276M S30900 (ASTM A276/A276M:2017) are both steel grades.
Both fall under the Stainless Steel category.
ASTM A959 309H is typically used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1), while ASTM A276/A276M S30900 is commonly used for stainless steel bars and shapes (hot-finished or cold-finished).
ASTM A959 309H is defined under ASTM International, originating from United States, while ASTM A276/A276M S30900 is defined under ASTM International, originating from United States.
As per chemical composition, ASTM A959 309H vs ASTM A276/A276M S30900 is a 94.2% 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 94.2%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
ASTM A959 309H
ASTM A276/A276M S30900
Tensile Strength
Not specified
>=515 MPa
Yield Strength
Not specified
>=205 MPa
Elongation
Not specified
>=40%
Condition
Not specified
Condition A (Annealed), hot-finished, all sizes (first row printed)
Typical Applications
ASTM A959 309H
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
ASTM A276/A276M S30900
Stainless steel bars and shapes (hot-finished or cold-finished)
Can ASTM A959 309H Be Substituted With ASTM A276/A276M S30900?
ASTM A959 309H and ASTM A276/A276M S30900 overlap closely enough on chemistry and mechanical properties that ASTM A276/A276M S30900 is often considered as a substitute for ASTM A959 309H 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 A959 309H and ASTM A276/A276M S30900?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can ASTM A959 309H be substituted with ASTM A276/A276M S30900?
ASTM A959 309H and ASTM A276/A276M S30900 overlap closely enough on chemistry and mechanical properties that ASTM A276/A276M S30900 is often considered as a substitute for ASTM A959 309H in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.