Cov muaj pes tsawg leeg ntawm S355 (qib tsheb)?
C Tsawg dua lossis sib npaug 0.22%, Si Less dua lossis sib npaug 0.55%, Mn Tsawg dua lossis sib npaug 1.60%, P Tsawg dua lossis sib npaug 0.025%, S Tsawg dua lossis sib npaug 0.015%.
Mechanical Properties (Key automotive indicators)?
Yield zog: 355MPa (tsawg dua los yog sib npaug rau 16mm)
Tensile zog: 470-630MPa
Elongation: Ntau dua lossis sib npaug li 21% (JR); Ntau dua lossis sib npaug li 25% (MC)
Kev cuam tshuam: JR (Ntau dua lossis sib npaug rau 27J ntawm 20 degree), J2 (Ntau dua lossis sib npaug rau 27J ntawm -20 degree), MC (zoo heev rau kev sib sau txias)
Hardness (HB)?
140-190HB, yooj yim rau txiav / laum / stamp.
Kev qaug zog ua haujlwm (core automotive nam)?
Siab - voj voog qaug zog ≈180–220MPa, kwv yees li 40% zoo dua Q235, haum rau chassis / ncua sij hawm alternating loads.
Weldability (key automotive aspect)? Carbon equivalent ≤0.40%, no preheating required for conventional welding; for thick plates (>20mm), preheating ntawm 100-150℃yog tsim nyog los tiv thaiv kev tawg.