ASTM A959:2011 439: Ferritic stainless steel type 439 (UNS S43035) with the composition limits of ASTM A959-11. Carbon up to 0.030% and chromium 17.0-19.0%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
Al
C
Cr
Mn
N
Ni
P
S
Si
<=0.15
<=0.030
17.0-19.0
<=1.00
<=0.030
<=0.50
<=0.040
<=0.030
<=1.00
More data from ASTM A959:2011
From the standard
Other composition limitsfrom Table 1 and its footnotes
UNS number
S43035
Metallurgical class
Ferritic grade: body-centered cubic, little or no tempered martensite, hardenable only slightly by cold working
Type
439 (designation originally assigned by the American Iron and Steel Institute)
Values
Maximum unless a range or minimum is shown; where two limits are shown for the same element in one grade the more stringent applies
Other elements (as printed)
Al 0.15, Ti 0.20+4x(C+N)-1.10
These are the recommended composition limits of the A959 guide, intended for adoption by standards for stainless steel products; they are not a product specification. As printed: printed twice, under Ferritic grades and under Martensitic grades, with the same limits; loaded once as ferritic.
Source: ASTM A959:2011, Table 1 and its footnotes
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