We are professional Nickle alloy / superalloy fasteners factory.We
can produce Bolt , Nut, Washer, Threaded rod, Split cotter
Pins, R clips and machining special parts according to the drawing
with material of Hastelloy,Monel,Incoloy,Inconel,Titanium ,
Duplex series,Nimonic and normal stainless steel. If you
select us,you will enjoy the service by our 10 years experienced
sales!We seek:Professional service!Good quality
products!Trustworthy factory!254SMo/1.4547 HEX WASHER 1. Standard:
DIN125A/9021,ISO7098/7093,SAE,USS 2. Grade: 254SMo/1.4547 3.
Material: 254SMo/1.4547 4. Colour: Bright 5. Package: Bulk in 25 kg
carton, then in pallet 6. Delivery time: 35days Professional
factoryWe have duplex,hastelloy,Monel,Incoloy,Inconel
fastenersDelivery time2-3 weeks to urgent orderProduct Description
254SMO UNSAISI/ASTMIDW.NrS31254254SMoF441.4547
254SMO Chemical composition:
Alloy%NiCrMoCuNCMnSiPS254SMOMin.17.519.560.50.18 Max.18.520.56.510.220.0210.80.030.01
254SMO Physical properties : Density8.0
g/cm3Melting point1320-1390 ºC 254SMO minimum
mechanical properties in the room temperature: StatusTensile
strengthRm N Rm N/mm2Yield strength RP0.2N/mm2ElongationA5
%254 SMO65030035 Characteristic: The high
concentration of molybdenum,chromium and nitrogen made 254SMO has
very good resistance to pitting and crevice corrosion performance.
Copper improved corrosion resistance in some of the acid . In
addition, due to its high content of nickel,chromium and
molybdenum, so that 254SMO have a good stress strength corrosion
cracking performance. 1.A lot of a wide range use of experience has
shown that even iin higher temperatures, 254SMO in the sea water is
also highly resistant to corrosion performance gap, only a few
types of stainless steel with this performance. 2.254SMO such as
bleach paper required for the production of acidic solution and the
solution halide oxidative corrosion resistance and corrosion
resistance can be compared to the most resilient in the base alloy
of nickel and titanium alloys. 3.254SMO due to a high nitrogen
content, so its mechanical strength than other types of austenitic
stainless steel is higher. In addition, 254SMO also highly scalable
and impact strength and good weldability. 4.254SMO with high
molybdenum content can make it higher rate of oxidation in the
annealing , which after the acid cleaning with rough surface than
normal stainless steel is more common than the rough surface.
However,has not adversely affected for the corrosion resistance of
this steel . Metallurgical structure 254SMO is face-centered
cubic lattice structure. In order to obtain austenitic structure,
254SMO general annealing in the 1150-1200ºC.In some cases, the
material maybe with the traces of metal middle phase (χ phase and
α-phase). However,their impact strength and corrosion resistance
are not adversely affected in normal circumstances. When placed in
the range of 600-1000ºC, they may phase in the grain boundary
precipitation. Corrosion resistance 254SMO with very low
carbon content, which means that the danger by the heating caused
of carbide precipitation is very small. Even in the
600-1000ºC after one hour sensitization still able to Strauss
through the intergranular corrosion test (Strauss Test ASTMA262
order E).However, because of the high-alloy steel content. In the
above-mentioned temperature range intermetallic phase with the
possibility of metal in the grain boundary precipitation. These
sediments do not make it occur intergranular corrosion in the
corrosive media applications, then,welding can be carried out
without intergranular corrosion.But in the heat of concentrated
nitric acid, these sediments may be caused intergranular corrosion
in heat-affected zone. If ordinary stainless steel in the solution
that containing chloride, bromide or iodide,it will show pitting,
crevice corrosion or stress corrosion cracking form by localized
corrosion. However, in some cases,the existence of halide will
speed up the uniform corrosion. Particularly in the non-oxidizing
acid. In pure sulfuric acid, 254SMO with a much greater corrosion
resistance than 316(common stainless steel),but with abated
corrosion resistance compared to 904L (NO8904) stainless
steel in high concentrations. In the sulfuric acid containing
chloride ions , 254SMO with the largest corrosion resistance
ability.The 316 can not be used for stainless steel in hydrochloric
acid since it may occur localized corrosion and uniform corrosion,
but 254SMO can be used in diluted hydrochloric acid in general
temperatures,uder the border region do not need to worry about
corrosion occurred. However, we must try to avoid the gap cracks.
In the fluoride silicate (H2SiF4) and hydrofluoric acid (HF), the
corrosion resistance of ordinary stainless steel is very limited,
and 254SMO can be used in a very wide temperature and
concentration. Applied field:254SMO is a mult-purpose
material can be used in many industrial applications: 1. Petroleum,
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