Q1100D (GB / T 1591) yog ib qho ultra-}}}} mo, 0.02-0.20% v / nb / ti, thiab tsawg dua lossis sib npaug rau 0.030% p / s.
Qhov no muaj cov kab ke muab faib 1100 MPa yam tsawg kawg ntawm lub zog thiab muaj zog rau cov neeg ua yeeb yam zoo dua lossis sib npaug ntawm 40}} Q1100D muab cov kev ua kom muaj zog - rau {{14} Qhov hnyav nyhav, txo qhov hnyav los ntawm 50% piv rau cov ntawv thov sib npaug. Nws yog Tuam Tshoj qhov siab tshaj plaws-lub zog qauv qauv hlau, siv rau hauv kev tiv thaiv thiab kev sib cais heev uas tsis muaj zog ntawm lub zog.