ASTM A959:2011 29-4C: Ferritic stainless steel type 29-4C (UNS S44735) with the composition limits of ASTM A959-11. Carbon up to 0.030% and chromium 28.0-30.0%.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Cr
Mn
Mo
N
Ni
P
S
Si
<=0.030
28.0-30.0
<=1.00
3.6-4.2
<=0.045
<=1.00
<=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
S44735
Metallurgical class
Ferritic grade: body-centered cubic, little or no tempered martensite, hardenable only slightly by cold working
Type
29-4C (common type number, not a trademark, widely used; not associated with any one product)
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)
Ti+Cb 6x(C+N)-1.00, and Ti-Cb 0.20 min
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.
Source: ASTM A959:2011, Table 1 and its footnotes
Active ASTM A959:2011 29-4C Listings on M-EX (For Sale)