Strong Match — 93.9% match
based on chemical composition and mechanical property overlap.
BS 970 (Part 1) 304S15 (BS 970 (Part 1):1983) and UNI 6900 X5CrNi1810 (UNI 6900:1971) are both steel grades.
Both fall under the Stainless Steel category.
BS 970 (Part 1) 304S15 is typically used for austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (table 14, with table 15 for the cold drawn condition)., while UNI 6900 X5CrNi1810 is commonly used for used in kitchen equipment, chemical tanks, piping, architectural panels, food processing equipment, and fasteners..
BS 970 (Part 1) 304S15 is defined under British Standards (BS), originating from United Kingdom, while UNI 6900 X5CrNi1810 is defined under Ente Nazionale Italiano di Unificazione (UNI), originating from Italy.
As per chemical composition, BS 970 (Part 1) 304S15 vs UNI 6900 X5CrNi1810 is a 93.9% 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 93.9%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
BS 970 (Part 1) 304S15
UNI 6900 X5CrNi1810
Tensile Strength
Not specified
520-720 MPa
Yield Strength
Not specified
210 MPa min
Elongation
Not specified
45% min
Hardness
Not specified
187 HB max
Typical Applications
BS 970 (Part 1) 304S15
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
UNI 6900 X5CrNi1810
Used in kitchen equipment, chemical tanks, piping, architectural panels, food processing equipment, and fasteners.
Can BS 970 (Part 1) 304S15 Be Substituted With UNI 6900 X5CrNi1810?
BS 970 (Part 1) 304S15 and UNI 6900 X5CrNi1810 overlap closely enough on chemistry and mechanical properties that UNI 6900 X5CrNi1810 is often considered as a substitute for BS 970 (Part 1) 304S15 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 BS 970 (Part 1) 304S15 and UNI 6900 X5CrNi1810?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can BS 970 (Part 1) 304S15 be substituted with UNI 6900 X5CrNi1810?
BS 970 (Part 1) 304S15 and UNI 6900 X5CrNi1810 overlap closely enough on chemistry and mechanical properties that UNI 6900 X5CrNi1810 is often considered as a substitute for BS 970 (Part 1) 304S15 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.