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Ste255 irin awo

Steel Ste255 ni a lo fun awọn ibeere pataki gẹgẹbi DIN 17178: 1986-5 fun awọn tubes irin ti a fi oju ṣe ati ni ibamu si DIN 17179: 1986-5 fun awọn tubes irin ti ko ni oju. Awọn tubes irin wọnyi ni a lo ju gbogbo wọn lọ ni ikole ọkọ oju omi titẹ, ikole ohun elo, ikole paipu, ati ni ẹrọ gbogbogbo ati ikole ohun elo.
Kemikali Tiwqn
Ipele C
Si Mn P
S
N
Al
Kr
Ku
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 Ini
Awọn ipele Agbara Fifẹ Rmfun
awọn sisanra ọja s,ni mm
N/mm²
UpperEso WahalaReH²) fun awọn sisanra ọja s, ni mm
N/mm² min.
Elongation lẹhin dida egungun3)
(Lo= 5do) % iseju.
Iwọn ila opin Mandrel fun idanwo tẹ 4), 5)
s≤70 70s≤85 85s≤100 100 s≤125 125s≤150 s≤16 16s≤35 35s≤50 50 s≤60 60s≤70 70s≤85 85s≤100 100 s≤125 125s≤150 Gigun Iyipada 6)
StE255 360~480 350~470 340~460 330~450 320~440 255 245 235 225 215 205 195 25
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