Cold Rolled Stainless Steel Sheet Grade 444 Thickness 0.8 - 3.0mm
2B Surface Small Tolerance
Our 444 stainless steel sheet in stock
Grade 444 is a low carbon, dual stabilised, molybdenum containing
ferritic stainless steel with good ductility, toughness and
resistance to sensitisation, even in the welds. With 18% chromium
and 2% molybdenum, the steel has good pitting resistance and
crevice corrosion resistance, similar to 316 and good general
corrosion resistance and oxidation resistance, similar to 316 in
most environments. Being a ferritic stainless steel, 444 is not
susceptible to Stress Corrosion Cracking. Annealed 444 is ductile
and can be formed using a wide range of roll forming or mild
stretch bending operations as well as the more common drawing and
bending operations. 444 does not harden excessively during cold
working.The steel has limited weldability and should not be used in
the as-welded condition for dynamic or impact loaded structures. As
with most ferritic stainless steels, 444 can undergo grain growth
in the heat affected zone of weldments, which may adversely affect
the mechanical properties in these zones. Applications involving
welded 444 are thus generally limited to a thickness of 2.5mm.444
has good pitting resistance and is thus suitable for roofing and
cladding in marine environments, as well as hot water tanks and
geysers, heat exchanger tubing and food processing equipment.
Chemical Composition of 444 stainless steel
|444 max||0.025||1.00||1.00||0.040||0.030||1.75 - 2.50||17.5 - 19.5||1||1||0.2+4(C+N)-0.8|
Grade 444 is Molybdenum alloyed ferritc steel, and because of this,
resistance to localized corrosion is close to grade 1.4404 / AISI
316 “acid-proof” austenitic. In chloride containing solutions
pitting and crevice corrosion is possible, depending on various
parameters like chloride concentration, temperature, pH value,
redox potential, crevice geometry and others. Optimal material
performance is usually achieved through efficient design, correct
post-weld treatment and regular cleaning during use (if
The nickel-free ferritic grades have excellent resistances to
chloride induced stress corrosion cracking.
444 can be readily cold-formed by all standard processes. It is
particularly suitable for deep drawing. The deep drawability of 444
is comparable to that of deep drawing quality carbon steels.
444 has a lower work hardening rate than standard austenitic
grades. This characteristic makes the grade 444 less suitable for
applications involving stretch forming. For the same reason, 444 is
more easily cold formed and machined. The forces needed in
cold-forming and machining are similar to those needed for
low-alloyed carbon steels.
Normally, 444 is not prone to the “ridging and roping” surface
defect in deep drawing.
444 has low C and N contents. It is also stabilized with titanium
and niobium which reduces or prevents the sensitation and formation
of martensite. The stabilization gives this ferritic steel better
weldability than many of the previously presented ferritic steels.
The weldability is mainly limited by grain growth in the HAZ (heat
affected zone), so the heat input must be kept to a minimum.
Austenitic fillers are mostly used.