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SN400A welding structure steel is in the Japanese standard JIS G3136 .SN400A structural steel plate/sheet is used for the structure part with high requirement of mechanical property and welding performance in building, bridge, ship , automobile, pertroleum container and construction vehicles.
Standard: JIS G3136
Dimension range : 3mm -580mm x 1000mm-4000mm x 1000mm-18000mm
Heat treatment of SN400A steel sheet /plate maybe subjected to normalizing,quench-hardening and tempering,or tempering as necessary .Further ,or appropriate heat treatment may be applied upon the purchase .
JIS G3136 SN400A Mild steel plate Mechanical Properties :
Mechanical Properties |
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Grade |
Tensile test (transverse) |
V notch impact test |
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Upper yield strength MPa |
Tensile strength MPa |
Elongation% |
180°Bend test b≥35mm Inner diameter |
Temperature °C |
Energy J |
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L=50 b=25 |
L=200 b=40 |
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Nominal thickness mm |
Nominal thickness mm |
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≤16 |
>16 |
|
≤5 |
>5~16 |
>16 |
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SN400A |
N.A |
N.A |
400~510 |
≥18 |
≥18 |
≥22 |
2a |
- |
≥27 |
SN400A Carbon steel sheet Chemical composition ( %) :
Chemical composition | ||||||
Grade |
Thickness mm |
C ≤ |
Si ≤ |
Mn ≤ |
P ≤ |
S ≤ |
SN400A |
≥16 ≤50 |
0.20 |
0.35 |
0.60~1.40 |
0.020 |
0.008 |
>50 ≤100 |
0.22 |
Delivery Status : Rolling, rolling or normalizing probe
JIS G3136 SN400A structural steel plate application :
SN400A is mainly used in the production of industrial and civil buildings, such as pillars and bearing beams, for high-rise buildings and large-span buildings.
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