Q490R thawv steel phaj, muab faib ua D \ E \ F, 3 qib, feem ntau siv hauv pob tso tsheb hlau luam, roj thiab roj tso tsheb hlau luam, roj tso tsheb hlau luam, lub zog hluav taws xob nuclear reactor siab plhaub, roj av liquefied roj thooj av, hydraulic turbine worm shells thiab lwm yam.
"Q": qhia lub zog ntawm steel phaj "yield" pib
"490": qhia tias qhov kev txwv qis ntawm cov khoom siv zog ntawm cov phaj steel tsis tsawg dua 490MPa.
"R": qhia tias cov phaj hlau yog lub thawv phaj
"D": qhia tias steel phaj zoo qib D qhia tias steel phaj ua -20 degrees cuam tshuam
"E": qhia tias steel phaj zoo qib E qhia tias steel phaj ua -40 degrees cuam tshuam
"F": qhia tias steel phaj zoo qib E qhia tias steel phaj ua -60 degrees cuam tshuam
Qib: Q490R
Tensile zog (σb / MPa): Ntau dua lossis sib npaug rau 440 ~ 590Mpa
Tawm taw tes (σs / MPa): Ntau dua lossis sib npaug rau 260Mpa
Elongation: Ntau dua lossis sib npaug li 22%
Kub / degree: 20 degree
Kev cuam tshuam lub zog nqus KV2 / J: Ntau dua lossis sib npaug rau 31J
Tensile zog: 440-580Mpa
Yield zog: 570-720Mpa
Elongation: 18%
Qhov kub thiab txias: -20 degrees
Kev ua haujlwm siab: 47J
180 degree dabtsi yog khoov kuaj dabtsi yog khoov txoj kab uas hla (b Ntau tshaj lossis sib npaug rau 35mm): d=3a
