Steel Plate GB/T1591

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GB/T1591 Q345A
C % Si % Mn % P % S % N %
≤0.16 ≤0.55 0.80-1.50 ≤0.040 ≤0.040 …
Thickness Yield Strength (Mpa) Tensile Strength Elongation Impact Energy
(mm) (MPa) (%) Min 
≤ 16 295 390-570 23 +20℃ 34J
> 16-40 275 390-570 23 +20℃ 34J
>40 255 390-570 23 +20℃ 34J
The min impact energy is longitudinal energy
GB/T1591 Q390A
C % Si % Mn % P % S % N %
≤0.20 ≤0.55 1.00-1.60 ≤0.045 ≤0.045 …
Thickness Yield Strength (Mpa) Tensile Strength Elongation Impact Energy
(mm) (MPa) (%) Min 
≤ 16 390 490-650 19 - -
> 16-35 370 490-650 19 - -
>35 350 490-650 19 - -
The min impact energy is longitudinal energy
GB/T1591 Q420B
C % Si % Mn % P % S % N %
≤0.20 ≤0.55 1.00-1.70 ≤0.040 ≤0.040 …
Thickness Yield Strength (Mpa) Tensile Strength Elongation Impact Energy
(mm) (MPa) (%) Min 
≤ 16 420 520-680 18 20 34
> 16-35 400 520-680 18 20 34
>35 380 520-680 18 20 34
The min impact energy is longitudinal energy
GB/T1591 Q460E
C % Si % Mn % P % S % N %
≤0.20 ≤0.55 1.00-1.70 ≤0.025 ≤0.025 …
Thickness Yield Strength (Mpa) Tensile Strength Elongation Impact Energy
(mm) (MPa) (%) Min 
≤ 16 460 550-720 17 -40 27
> 16-35 440 550-720 17 -40 27
>35 420 550-720 17 -40 27
The min impact energy is longitudinal energy

If you are interested in other carbon steel plates, please click here - ASTM A36, ASTM A283, ASTM A572, ASTM A656, JIS G3101 SS400, EN10025-2, DIN 17100, DIN 17102, GB/T700.

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