Q420 steel yog Suav steel qib qis alloy siab zog cov qauv hlau nrog lub zog ntawm 420 MPa, lub zog tensile ntawm 520-680 MPa thiab cov khoom ntom ntom ntawm 7.85 g / cm3.
GB / T1591 Q420 muaj tsib qib steel sib txawv raws li Q420A, Q420B, Q420C, Q420D thiab Q420E.Structural steel Q420D yuav tsum ua kom muaj kev cuam tshuam rau qhov ntsuas kub qis qis qis 20 degree centigrade.Normalised kev kho cua sov pom zoo kom ua rau qis alloy steel phaj hnyav tuab.
Tshuaj muaj pes tsawg leeg:
| Cov ntsiab lus tshuaj tseem ceeb ntawm Q420D | ||||||||||
| C | Si | Mn | P | S | V | Nb | Ti | Al (min.) | Cr | Ni |
| 0.20 | 0.55 | 1.00-1.70 | 0.030 | 0.030 | 0.02-0.20 | 0.015-0.060 | 0.02-0.20 | 0.015 | 0.40 | 0.70 |
Mechanical khoom:
| Thickness (hli) | ||||
| Q420D | Tsawg dua los yog sib npaug li 16 | >16 Tsawg dua lossis sib npaug li 35 | >35 Tsawg dua los yog sib npaug li 50 | >50 |
| Yield zog (Ntau dua lossis sib npaug rau Mpa) | 420 | 400 | 380 | 360 |
| Tensile zog (Mpa) | 520-680 | |||
