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Introduction
254SMO is an austenitic stainless steel, similar to alloy 904L, but with increased molybdenum and nitrogen contents, to be used in seawater, oil and gas piping systems on offshore production platforms and other aggressive chloride bearing media. With an excellent resistant to pitting, crevice corrosion and to stress-corrosion cracking.
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Characters
l Excellent resistance to pitting and crevice corrosion
l High resistance to general corrosion
l High resistance to stress corrosion cracking
l Higher strength than conventional austenitic stainless steels
l Good weldability
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Applications
l Seawater handling equipment
l Pulp mill bleach systems
l Tall oil distillation columns and equipment
l Chemical processing equipment
l Food processing equipment
l Desalination equipment
l Flue gas desulfurization scrubbers
l Oil and Gas production equipment
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Equal grades
UNS S31254,EN Number 1.4547,EN Name X1CrNiMoCuN20-18-7,W.Nr. 1.4529*(close replacement),F44(ASTM A182/A 182M)
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Chemical composition (%)
C≤0.020,Si≤0.80,Mn≤1.00,P≤0.030,S≤0.010,Cr=19.5~20.5,Ni=17.5~18.5,Mo=6.0~6.5,N=0.18~0.22, Cu=0.50~1.00,Fe=remainder
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Standards
Seamless pipe: ASTM A269, A213, A312, NFA 49-217, EN 10216-5
Welded pipe: ASTM A249, A269 , A312, A358, A409
Fitting: ASTM A182
Bar & rod: ASTM A276, A479, EN 10088-3
Forging: ASTM A473
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Forms available at A-one Alloy
Plate, sheet, strip, pipe, tube
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Delivery
Please confirm with A-one Alloy.
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