What is the Chinese made car side door bumper?

What is the Chinese made car side door bumper?

China's automobile side door anti-collision steel pipe is made of Shanghai Baosteel BR1500HS material anti-collision steel pipe,
How many tensile strength of BR1500HS welded pipe [BR1500HS material anti-collision steel tube] used in automobile manufacturing?
It's a kind of high strength weather resistant steel
Percentage of ingredients (wt%)
C 0.19~0.25
B 0.0008~0.005
Mn 1.10~1.4
Cr 0.15~0.35
Al 0.02~0.06
Ti 0.02~0.05
Si = 0.40
P = 0.025
S = 0.015
Performance of BR1500HS automotive side door bumper:
BR1500HS car side door anti-collision before quenching yield strength more than 300MPa, the tensile strength is more than 600MPa;
BR1500HS car side collision rod after quenching yield strength more than 1200MPa, the tensile strength is more than 1500MPa;