Q355 steel yog dab tsi?
Q355 yog qhov qis- alloy siab- lub zog cov qauv hlau tau teev tseg hauv Suav teb tus qauv GB/T 1591-2018, hloov cov qib qub 16Mn thiab Q345.
Qib Q355 txhais li cas?
Q: Thawj tsab ntawv ntawm tus pinyin rau yield zog (Qu);
355: Yam tsawg kawg nkaus yield zog Ntau tshaj los yog sib npaug rau 355MPa rau thickness Tsawg dua los yog sib npaug rau 16mm;
A / B / C / D / E: Cov qib zoo (qhov sib txawv ntawm qhov kub thiab txias thiab P / S cov ntsiab lus).
Q355 yog dab tsi? Dab tsi yog qhov txawv?
Cov qauv tau muab faib ua tsib theem: A, B, C, D, thiab E. Qhov sib txawv tseem ceeb nyob hauv qhov kub thiab txias thiab qhov txwv siab ntawm cov khoom tsis zoo (P / S):
A: Tsis muaj kev cuam tshuam, P Tsawg dua lossis sib npaug rau 0.045%, S Tsawg dua lossis sib npaug li 0.045%;
B: Kev cuam tshuam ntawm 20℃Ntau dua lossis sib npaug rau 34J, P Tsawg dua lossis sib npaug rau 0.040%, S Tsawg dua lossis sib npaug li 0.040%;
C: Kev cuam tshuam ntawm 0℃Ntau dua lossis sib npaug rau 34J, P Tsawg dua lossis sib npaug rau 0.035%, S Tsawg dua lossis sib npaug 0.035%;
D: Kev cuam tshuam ntawm -20℃Ntau dua lossis sib npaug rau 27J, P Tsawg dua lossis sib npaug rau 0.030%, S Tsawg dua lossis sib npaug 0.025%;
E: Kev cuam tshuam ntawm -40℃Ntau dua lossis sib npaug rau 27J, P Tsawg dua lossis sib npaug rau 0.025%, S Tsawg dua lossis sib npaug rau 0.025%.
Dab tsi yog qhov txawv ntawm Q355, Q345, thiab Q235? Q235: Ordinary carbon structural steel, yield zog 235MPa, qis zog thiab qis tshaj tus nqi;
Q345: Cov laus qis- alloy siab- lub zog steel, tawm lub zog 345MPa, hloov los ntawm Q355;
Q355: Cov tiam tshiab qis- alloy siab- lub zog steel, yield zog 355MPa, superior zog, toughness, thiab weldability.
Dab tsi yog qhov sib npaug thoob ntiaj teb ntawm Q355?
Kwv yees qhov sib npaug: S355JR (European standard EN 10025), A572 Gr.50 (American standard ASTM), tab sis qhov muaj pes tsawg leeg thiab cov kev xav tau sib txawv.