Strong Match — 97.6% match
based on chemical composition and mechanical property overlap.
NF A35-574 Z7CN18-09 (NF A35-574:1990) and BS 970 (Part 1) 304S31 (BS 970 (Part 1):1983) are both steel grades.
Both fall under the Stainless Steel category.
NF A35-574 Z7CN18-09 is typically used for used for food processing equipment, kitchen equipment, chemical tanks, piping, architectural components, and fasteners., while BS 970 (Part 1) 304S31 is commonly used for austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (table 14, with table 15 for the cold drawn condition)..
NF A35-574 Z7CN18-09 is defined under Association Francaise de Normalisation (NF), originating from France, while BS 970 (Part 1) 304S31 is defined under British Standards (BS), originating from United Kingdom.
As per chemical composition, NF A35-574 Z7CN18-09 vs BS 970 (Part 1) 304S31 is a 97.6% 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 97.6%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property
NF A35-574 Z7CN18-09
BS 970 (Part 1) 304S31
Tensile Strength
500-700 MPa
Not specified
Yield Strength
190-250 MPa
Not specified
Elongation
40-55%
Not specified
Hardness
140-210 HB
Not specified
Typical Applications
NF A35-574 Z7CN18-09
Used for food processing equipment, kitchen equipment, chemical tanks, piping, architectural components, and fasteners.
BS 970 (Part 1) 304S31
Austenitic stainless and heat resisting steel for mechanical and allied engineering purposes (Table 14, with Table 15 for the cold drawn condition).
Can NF A35-574 Z7CN18-09 Be Substituted With BS 970 (Part 1) 304S31?
NF A35-574 Z7CN18-09 and BS 970 (Part 1) 304S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 304S31 is often considered as a substitute for NF A35-574 Z7CN18-09 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 NF A35-574 Z7CN18-09 and BS 970 (Part 1) 304S31?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can NF A35-574 Z7CN18-09 be substituted with BS 970 (Part 1) 304S31?
NF A35-574 Z7CN18-09 and BS 970 (Part 1) 304S31 overlap closely enough on chemistry and mechanical properties that BS 970 (Part 1) 304S31 is often considered as a substitute for NF A35-574 Z7CN18-09 in many applications. Always confirm the specific property range your application needs before substituting, and check with your supplier's mill certificate.