Chemical element composition of Chinese grade hot-rolled or normalized bridge steel Q460qF
Q460qF Approximate Grade Lookup Table

Q460qF  Chemical composition of thermomechanically rolled steel

Grade Quality
grade		 Chemical Composition(Quality Fraction)/%
C Si Mnᵃ  S   P  Nbᵇ Vᵇ Tiᵇ Alsᵇ,ᶜ Cr Ni Cu Mo N
≤ ≤
Q460q F 0.11 0.55 1.00~1.70  ≤0.006   ≤0.015  0.010~
0.090		 0.010~
0.080		 0.006~
0.030		 0.010~
0.045		 0.5 0.3 0.3 0.25 0.008
a:According to the agreement between the supplier and the buyer, the maximum manganese content can be 2.00%.
b:Al, Nb, V, and Ti can be added individually or in combination. When added individually, they should comply with the provisions in the table. When added in combination, at least one alloying element should be added at the lower limit specified in the table, and Nb+V+Ti ≤ 0.22%.
c:When using total aluminum (Alt) content for calculation, the total aluminum content should be 0.015%~0.050%.

Q460qF  Mechanical properties of steel

Grade Quality grade Tensile testᵃ,ᵇ Impact testᶜ
Lower yield strength ReL/MPa tensile strength Rm/MPa Elongation after fracture
A/%		 Temperature℃ Impact absorption energy
KV2/J
Thickness≤50mm 50mm<Thickness≤100mm 100mm<Thickness≤150mm
≥ ≥
Q460q F 460 450 — 570 18 -60 47
a:When the yield strength is not obvious, Rp0.2 can be measured instead of the lower yield strength.
b:For tensile tests, transverse specimens are taken.
c:Longitudinal specimens are used for impact testing.