Standard GBASMEEMCULENDINIECGS etc. Material Q235A/Q235B/Q235C/Q345A/Q345B/Q345C/45#/65Mn. Thickness 6.00-150mm. Width 1300-3000mm. Tolerance "+ /-0.2mm" Surface treatment oiling drying passivation treatment chromium-free passivation treatm

Spring plate standard GB material 27SiMn 35SiMn 55SiMn 60Si2Mn 65Mn. Thickness 8-650mm width 1500-3000mm tolerance Surface treatment 65Mn spring steel is generally shot peened in accordance with the requirements of the national standard so that the