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StE255 lamina ferrea

Steel StE255 ad speciales requisita adhibita secundum DIN 17178 : 1986-5 pro tubulis ferreis iuncta et secundum DIN 17179 : 1986-5 pro tubulis ferri inconsutilibus. Hi fistulae chalybea potissimum adhibentur in pressione vasis constructionis, apparatus constructionis, constructionis organi, necnon in genere machinae et constructionis instrumentorum.
Compositio chemica
Gradus 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
Mechanica Property
Grades R . fortitudo distrahentesmfor*
crassitudines productum s, in mm *
N/mm²
UpperYield StressReH*) pro productum crassitudines s, in mm
N/mm² min.
Prolongatio post fracturam3)
(Lo*=5do*% min.
Mandrel diametri ad flexuram test 4).
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 Transversus 6)
StE255 360~480 350~470 340~460 330~450 320~440 255 245 235 225 215 205 195 25
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