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StE255 steel plate

Steel StE255 is used for special requirements according to DIN 17178 : 1986-5 for welded steel tubes and according to DIN 17179 : 1986-5 for seamless steel tubes. These steel tubes are used above all in pressure vessel construction, apparatus construction, pipe construction, as well as in general machine and equipment construction.
Chemical Composition
Grade C
Si Mn P
S
N
Al
Cr
Cu
Mo
Ni
Nb
Ti
V
Nb+Ti+V
StE255 0.18 ≤0.40 0.50 0.035 0.030 0.020 0.020 0.30 0.20 0.08 0.30 0.03 --- --- 0.05
Mechanical Property
Grades Tensile Strength Rm for
product thicknesses s,in mm
N/mm²
UpperYield StressReH²) for product thicknesses s,in mm
N/mm² min.
Elongation after fracture3)
(Lo=5do) % min.
Mandrel diameter for bend test 4), 5)
s≤70 70<s≤85 85<s≤100 100<s≤125 125<s≤150 s≤16 16<s≤35 35<s≤50 50<s≤60 60<s≤70 70<s≤85 85<s≤100 100<s≤125 125<s≤150 Longitudinal Transverse 6)
StE255 360~480 350~470 340~460 330~450 320~440 255 245 235 225 215 205 195 25
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